/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 13:49:44,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 13:49:44,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 13:49:44,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 13:49:44,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 13:49:44,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 13:49:44,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 13:49:44,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 13:49:44,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 13:49:44,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 13:49:44,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 13:49:44,379 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 13:49:44,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 13:49:44,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 13:49:44,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 13:49:44,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 13:49:44,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 13:49:44,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 13:49:44,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 13:49:44,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 13:49:44,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 13:49:44,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 13:49:44,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 13:49:44,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 13:49:44,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 13:49:44,726 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 13:49:44,727 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 13:49:44,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl [2021-05-03 13:49:44,728 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/fibonacci.wvr.bpl' [2021-05-03 13:49:44,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 13:49:44,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 13:49:44,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 13:49:44,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 13:49:44,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 13:49:44,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 13:49:44,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 13:49:44,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 13:49:44,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 13:49:44,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 13:49:44,869 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 13:49:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 13:49:44,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 13:49:44,870 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 13:49:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 13:49:44,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 13:49:44,870 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 13:49:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 13:49:44,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 13:49:44,872 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 13:49:45,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 13:49:45,072 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 13:49:45,073 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:45 BoogieIcfgContainer [2021-05-03 13:49:45,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 13:49:45,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 13:49:45,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 13:49:45,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 13:49:45,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/2) ... [2021-05-03 13:49:45,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275caa8e and model type fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 01:49:45, skipping insertion in model container [2021-05-03 13:49:45,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:45" (2/2) ... [2021-05-03 13:49:45,080 INFO L111 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.bpl [2021-05-03 13:49:45,085 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 13:49:45,085 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 13:49:45,088 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 13:49:45,089 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 13:49:45,113 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 13:49:45,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 13:49:45,160 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 13:49:45,160 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 13:49:45,160 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 13:49:45,160 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 13:49:45,160 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 13:49:45,161 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 13:49:45,161 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 13:49:45,161 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 13:49:45,167 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-05-03 13:49:45,206 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 13:49:45,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,218 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,218 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1266515445, now seen corresponding path program 1 times [2021-05-03 13:49:45,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36485574] [2021-05-03 13:49:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36485574] [2021-05-03 13:49:45,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:45,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 13:49:45,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505497470] [2021-05-03 13:49:45,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:45,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:45,574 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,639 INFO L93 Difference]: Finished difference Result 61 states and 108 transitions. [2021-05-03 13:49:45,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 13:49:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,648 INFO L225 Difference]: With dead ends: 61 [2021-05-03 13:49:45,648 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 13:49:45,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 13:49:45,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2021-05-03 13:49:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-05-03 13:49:45,678 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 13 [2021-05-03 13:49:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,678 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-05-03 13:49:45,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-05-03 13:49:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 13:49:45,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,680 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 13:49:45,680 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 861572483, now seen corresponding path program 2 times [2021-05-03 13:49:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861661724] [2021-05-03 13:49:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861661724] [2021-05-03 13:49:45,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:45,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 13:49:45,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269708331] [2021-05-03 13:49:45,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:45,844 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,915 INFO L93 Difference]: Finished difference Result 52 states and 95 transitions. [2021-05-03 13:49:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 13:49:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,918 INFO L225 Difference]: With dead ends: 52 [2021-05-03 13:49:45,918 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 13:49:45,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 13:49:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-03 13:49:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2021-05-03 13:49:45,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 13 [2021-05-03 13:49:45,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,934 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2021-05-03 13:49:45,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2021-05-03 13:49:45,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:45,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,936 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 13:49:45,936 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -580645877, now seen corresponding path program 1 times [2021-05-03 13:49:45,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195563045] [2021-05-03 13:49:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195563045] [2021-05-03 13:49:46,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:46,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331731011] [2021-05-03 13:49:46,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:46,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,008 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,086 INFO L93 Difference]: Finished difference Result 63 states and 114 transitions. [2021-05-03 13:49:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,088 INFO L225 Difference]: With dead ends: 63 [2021-05-03 13:49:46,088 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 13:49:46,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 13:49:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-05-03 13:49:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-05-03 13:49:46,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-05-03 13:49:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,093 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-05-03 13:49:46,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-05-03 13:49:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 13:49:46,094 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1509805029, now seen corresponding path program 1 times [2021-05-03 13:49:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759574419] [2021-05-03 13:49:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759574419] [2021-05-03 13:49:46,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708911273] [2021-05-03 13:49:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 13:49:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310161030] [2021-05-03 13:49:46,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:49:46,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:49:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:49:46,301 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,338 INFO L93 Difference]: Finished difference Result 59 states and 110 transitions. [2021-05-03 13:49:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,340 INFO L225 Difference]: With dead ends: 59 [2021-05-03 13:49:46,340 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 13:49:46,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 13:49:46,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-05-03 13:49:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-05-03 13:49:46,344 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-05-03 13:49:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,345 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-05-03 13:49:46,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-05-03 13:49:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,346 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,568 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash -709388465, now seen corresponding path program 2 times [2021-05-03 13:49:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909884290] [2021-05-03 13:49:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909884290] [2021-05-03 13:49:46,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:46,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:46,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193525989] [2021-05-03 13:49:46,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:46,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,594 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,640 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-05-03 13:49:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:46,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,641 INFO L225 Difference]: With dead ends: 80 [2021-05-03 13:49:46,641 INFO L226 Difference]: Without dead ends: 80 [2021-05-03 13:49:46,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-03 13:49:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 43. [2021-05-03 13:49:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-05-03 13:49:46,658 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 14 [2021-05-03 13:49:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,659 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-05-03 13:49:46,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-05-03 13:49:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,660 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 13:49:46,660 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,661 INFO L82 PathProgramCache]: Analyzing trace with hash -137933659, now seen corresponding path program 3 times [2021-05-03 13:49:46,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693470932] [2021-05-03 13:49:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693470932] [2021-05-03 13:49:46,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:46,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:46,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016050458] [2021-05-03 13:49:46,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:46,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:46,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,685 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,746 INFO L93 Difference]: Finished difference Result 77 states and 137 transitions. [2021-05-03 13:49:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:49:46,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:46,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,748 INFO L225 Difference]: With dead ends: 77 [2021-05-03 13:49:46,748 INFO L226 Difference]: Without dead ends: 74 [2021-05-03 13:49:46,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-03 13:49:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-05-03 13:49:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-05-03 13:49:46,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 14 [2021-05-03 13:49:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,760 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-05-03 13:49:46,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-05-03 13:49:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,765 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 13:49:46,767 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2069505205, now seen corresponding path program 2 times [2021-05-03 13:49:46,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116935238] [2021-05-03 13:49:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116935238] [2021-05-03 13:49:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409934208] [2021-05-03 13:49:46,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:46,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 13:49:46,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911566530] [2021-05-03 13:49:46,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:49:46,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:49:46,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:46,911 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,943 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2021-05-03 13:49:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,945 INFO L225 Difference]: With dead ends: 67 [2021-05-03 13:49:46,945 INFO L226 Difference]: Without dead ends: 67 [2021-05-03 13:49:46,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-03 13:49:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2021-05-03 13:49:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-05-03 13:49:46,959 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-05-03 13:49:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,959 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-05-03 13:49:46,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-05-03 13:49:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,960 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,960 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,173 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1760870987, now seen corresponding path program 3 times [2021-05-03 13:49:47,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099964330] [2021-05-03 13:49:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099964330] [2021-05-03 13:49:47,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296761853] [2021-05-03 13:49:47,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,200 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,238 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-05-03 13:49:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 13:49:47,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,239 INFO L225 Difference]: With dead ends: 60 [2021-05-03 13:49:47,239 INFO L226 Difference]: Without dead ends: 58 [2021-05-03 13:49:47,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-03 13:49:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-05-03 13:49:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-05-03 13:49:47,242 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-05-03 13:49:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,242 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-05-03 13:49:47,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-05-03 13:49:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,243 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 13:49:47,243 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1740461429, now seen corresponding path program 4 times [2021-05-03 13:49:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775918680] [2021-05-03 13:49:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775918680] [2021-05-03 13:49:47,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852169890] [2021-05-03 13:49:47,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,276 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,318 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2021-05-03 13:49:47,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:47,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,319 INFO L225 Difference]: With dead ends: 63 [2021-05-03 13:49:47,319 INFO L226 Difference]: Without dead ends: 63 [2021-05-03 13:49:47,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-03 13:49:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2021-05-03 13:49:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-05-03 13:49:47,326 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-05-03 13:49:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,326 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-05-03 13:49:47,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-05-03 13:49:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,328 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,328 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 13:49:47,329 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1478794711, now seen corresponding path program 5 times [2021-05-03 13:49:47,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510262929] [2021-05-03 13:49:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510262929] [2021-05-03 13:49:47,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677269186] [2021-05-03 13:49:47,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,372 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,415 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-05-03 13:49:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,416 INFO L225 Difference]: With dead ends: 65 [2021-05-03 13:49:47,416 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 13:49:47,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 13:49:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-05-03 13:49:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-05-03 13:49:47,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 14 [2021-05-03 13:49:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,419 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-05-03 13:49:47,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-05-03 13:49:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,419 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 13:49:47,420 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2050249517, now seen corresponding path program 6 times [2021-05-03 13:49:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668689058] [2021-05-03 13:49:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668689058] [2021-05-03 13:49:47,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466355459] [2021-05-03 13:49:47,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,450 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,493 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-05-03 13:49:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 13:49:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,494 INFO L225 Difference]: With dead ends: 58 [2021-05-03 13:49:47,494 INFO L226 Difference]: Without dead ends: 55 [2021-05-03 13:49:47,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-03 13:49:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2021-05-03 13:49:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 73 transitions. [2021-05-03 13:49:47,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 73 transitions. Word has length 14 [2021-05-03 13:49:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,497 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 73 transitions. [2021-05-03 13:49:47,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 73 transitions. [2021-05-03 13:49:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,497 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 13:49:47,498 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,498 INFO L82 PathProgramCache]: Analyzing trace with hash 118677971, now seen corresponding path program 4 times [2021-05-03 13:49:47,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229730901] [2021-05-03 13:49:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229730901] [2021-05-03 13:49:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398320565] [2021-05-03 13:49:47,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:49:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:47,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 13:49:47,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945957779] [2021-05-03 13:49:47,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:49:47,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:49:47,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:47,614 INFO L87 Difference]: Start difference. First operand 39 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,669 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-05-03 13:49:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,670 INFO L225 Difference]: With dead ends: 60 [2021-05-03 13:49:47,671 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 13:49:47,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 13:49:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-05-03 13:49:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 79 transitions. [2021-05-03 13:49:47,673 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 79 transitions. Word has length 14 [2021-05-03 13:49:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,673 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 79 transitions. [2021-05-03 13:49:47,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 79 transitions. [2021-05-03 13:49:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,674 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-03 13:49:47,874 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,875 INFO L82 PathProgramCache]: Analyzing trace with hash -345913133, now seen corresponding path program 5 times [2021-05-03 13:49:47,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800932695] [2021-05-03 13:49:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800932695] [2021-05-03 13:49:47,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403640409] [2021-05-03 13:49:47,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,896 INFO L87 Difference]: Start difference. First operand 41 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,952 INFO L93 Difference]: Finished difference Result 74 states and 127 transitions. [2021-05-03 13:49:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:49:47,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,953 INFO L225 Difference]: With dead ends: 74 [2021-05-03 13:49:47,953 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 13:49:47,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 13:49:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-05-03 13:49:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-05-03 13:49:47,955 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-05-03 13:49:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,955 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-05-03 13:49:47,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-05-03 13:49:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,956 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,956 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-03 13:49:47,956 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 36807255, now seen corresponding path program 6 times [2021-05-03 13:49:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612137396] [2021-05-03 13:49:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612137396] [2021-05-03 13:49:47,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:47,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 13:49:47,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776971347] [2021-05-03 13:49:47,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:47,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:47,979 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,015 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-05-03 13:49:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:48,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 13:49:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,016 INFO L225 Difference]: With dead ends: 44 [2021-05-03 13:49:48,016 INFO L226 Difference]: Without dead ends: 40 [2021-05-03 13:49:48,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-03 13:49:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-03 13:49:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-05-03 13:49:48,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 14 [2021-05-03 13:49:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,018 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-05-03 13:49:48,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-05-03 13:49:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:48,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,019 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:48,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-03 13:49:48,019 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash 467311611, now seen corresponding path program 1 times [2021-05-03 13:49:48,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977630772] [2021-05-03 13:49:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977630772] [2021-05-03 13:49:48,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878732151] [2021-05-03 13:49:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:48,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 13:49:48,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377896913] [2021-05-03 13:49:48,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:49:48,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:49:48,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:48,258 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,333 INFO L93 Difference]: Finished difference Result 61 states and 113 transitions. [2021-05-03 13:49:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,334 INFO L225 Difference]: With dead ends: 61 [2021-05-03 13:49:48,334 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 13:49:48,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 13:49:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-05-03 13:49:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 97 transitions. [2021-05-03 13:49:48,340 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 97 transitions. Word has length 15 [2021-05-03 13:49:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,340 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 97 transitions. [2021-05-03 13:49:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 97 transitions. [2021-05-03 13:49:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:48,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,341 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:48,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,564 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash 338569023, now seen corresponding path program 2 times [2021-05-03 13:49:48,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:48,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019997134] [2021-05-03 13:49:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019997134] [2021-05-03 13:49:48,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393192517] [2021-05-03 13:49:48,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:48,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:48,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 13:49:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070737814] [2021-05-03 13:49:48,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:48,797 INFO L87 Difference]: Start difference. First operand 51 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,878 INFO L93 Difference]: Finished difference Result 76 states and 137 transitions. [2021-05-03 13:49:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,881 INFO L225 Difference]: With dead ends: 76 [2021-05-03 13:49:48,881 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 13:49:48,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 13:49:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-05-03 13:49:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-05-03 13:49:48,883 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-05-03 13:49:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,884 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-05-03 13:49:48,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-05-03 13:49:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:48,884 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,884 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:49,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 13:49:49,101 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1953271747, now seen corresponding path program 3 times [2021-05-03 13:49:49,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:49,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601582096] [2021-05-03 13:49:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601582096] [2021-05-03 13:49:49,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839490620] [2021-05-03 13:49:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:49,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:49,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 13:49:49,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529114738] [2021-05-03 13:49:49,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:49,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:49,319 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:49,395 INFO L93 Difference]: Finished difference Result 64 states and 119 transitions. [2021-05-03 13:49:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:49,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:49,397 INFO L225 Difference]: With dead ends: 64 [2021-05-03 13:49:49,397 INFO L226 Difference]: Without dead ends: 57 [2021-05-03 13:49:49,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-03 13:49:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-05-03 13:49:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-05-03 13:49:49,399 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-05-03 13:49:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:49,399 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-05-03 13:49:49,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-05-03 13:49:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:49,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:49,400 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:49,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,605 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash -713510149, now seen corresponding path program 4 times [2021-05-03 13:49:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:49,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633933972] [2021-05-03 13:49:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633933972] [2021-05-03 13:49:49,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488048379] [2021-05-03 13:49:49,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:49,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 13:49:49,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54210848] [2021-05-03 13:49:49,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:49,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:49,803 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:49,876 INFO L93 Difference]: Finished difference Result 80 states and 148 transitions. [2021-05-03 13:49:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:49,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:49,877 INFO L225 Difference]: With dead ends: 80 [2021-05-03 13:49:49,877 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 13:49:49,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 13:49:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-05-03 13:49:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2021-05-03 13:49:49,879 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2021-05-03 13:49:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:49,880 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2021-05-03 13:49:49,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2021-05-03 13:49:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:49,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:49,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,089 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash 901192575, now seen corresponding path program 5 times [2021-05-03 13:49:50,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918871413] [2021-05-03 13:49:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918871413] [2021-05-03 13:49:50,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295518928] [2021-05-03 13:49:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:50,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:50,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 13:49:50,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621281523] [2021-05-03 13:49:50,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:50,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:50,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:50,331 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:50,405 INFO L93 Difference]: Finished difference Result 82 states and 150 transitions. [2021-05-03 13:49:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:50,406 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:50,406 INFO L225 Difference]: With dead ends: 82 [2021-05-03 13:49:50,407 INFO L226 Difference]: Without dead ends: 75 [2021-05-03 13:49:50,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-03 13:49:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-05-03 13:49:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-05-03 13:49:50,409 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-05-03 13:49:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:50,409 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-05-03 13:49:50,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-05-03 13:49:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:50,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:50,411 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 13:49:50,625 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1178101253, now seen corresponding path program 6 times [2021-05-03 13:49:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97920604] [2021-05-03 13:49:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97920604] [2021-05-03 13:49:50,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622410211] [2021-05-03 13:49:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:50,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 13:49:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:50,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:50,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 13:49:50,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707682830] [2021-05-03 13:49:50,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:49:50,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:49:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:50,842 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:50,908 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2021-05-03 13:49:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:50,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:50,909 INFO L225 Difference]: With dead ends: 67 [2021-05-03 13:49:50,909 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 13:49:50,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 13:49:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-05-03 13:49:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 57 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 113 transitions. [2021-05-03 13:49:50,911 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 113 transitions. Word has length 15 [2021-05-03 13:49:50,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:50,911 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 113 transitions. [2021-05-03 13:49:50,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,911 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 113 transitions. [2021-05-03 13:49:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:50,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:50,912 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,134 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385307, now seen corresponding path program 7 times [2021-05-03 13:49:51,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989060783] [2021-05-03 13:49:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989060783] [2021-05-03 13:49:51,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436014324] [2021-05-03 13:49:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:51,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 13:49:51,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60157578] [2021-05-03 13:49:51,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:51,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:51,254 INFO L87 Difference]: Start difference. First operand 58 states and 113 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:51,343 INFO L93 Difference]: Finished difference Result 84 states and 155 transitions. [2021-05-03 13:49:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:49:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:51,344 INFO L225 Difference]: With dead ends: 84 [2021-05-03 13:49:51,344 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 13:49:51,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 13:49:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2021-05-03 13:49:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 103 transitions. [2021-05-03 13:49:51,346 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 103 transitions. Word has length 16 [2021-05-03 13:49:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:51,346 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 103 transitions. [2021-05-03 13:49:51,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 103 transitions. [2021-05-03 13:49:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:51,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:51,347 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,568 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1405744629, now seen corresponding path program 8 times [2021-05-03 13:49:51,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420649805] [2021-05-03 13:49:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420649805] [2021-05-03 13:49:51,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991965488] [2021-05-03 13:49:51,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:51,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 13:49:51,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762527079] [2021-05-03 13:49:51,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:51,687 INFO L87 Difference]: Start difference. First operand 53 states and 103 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:51,739 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-05-03 13:49:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:51,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:51,740 INFO L225 Difference]: With dead ends: 81 [2021-05-03 13:49:51,740 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 13:49:51,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 13:49:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2021-05-03 13:49:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-05-03 13:49:51,743 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 16 [2021-05-03 13:49:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:51,743 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-05-03 13:49:51,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-05-03 13:49:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:51,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:51,744 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 13:49:51,957 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1226449649, now seen corresponding path program 9 times [2021-05-03 13:49:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840181994] [2021-05-03 13:49:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840181994] [2021-05-03 13:49:51,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369416200] [2021-05-03 13:49:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:52,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:52,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:52,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095571634] [2021-05-03 13:49:52,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:52,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:52,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:52,066 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,171 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2021-05-03 13:49:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:49:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,172 INFO L225 Difference]: With dead ends: 154 [2021-05-03 13:49:52,172 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 13:49:52,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 13:49:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2021-05-03 13:49:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1639344262295084) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 132 transitions. [2021-05-03 13:49:52,175 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 132 transitions. Word has length 16 [2021-05-03 13:49:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,176 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 132 transitions. [2021-05-03 13:49:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 132 transitions. [2021-05-03 13:49:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:52,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,176 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 13:49:52,385 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash -654994843, now seen corresponding path program 10 times [2021-05-03 13:49:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527340300] [2021-05-03 13:49:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:52,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527340300] [2021-05-03 13:49:52,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505803793] [2021-05-03 13:49:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:52,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:52,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:52,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584102594] [2021-05-03 13:49:52,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:52,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:52,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:52,520 INFO L87 Difference]: Start difference. First operand 62 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,699 INFO L93 Difference]: Finished difference Result 157 states and 283 transitions. [2021-05-03 13:49:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:49:52,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,700 INFO L225 Difference]: With dead ends: 157 [2021-05-03 13:49:52,700 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 13:49:52,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:49:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 13:49:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-05-03 13:49:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.096774193548387) internal successors, (130), 62 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 130 transitions. [2021-05-03 13:49:52,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 130 transitions. Word has length 16 [2021-05-03 13:49:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,703 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 130 transitions. [2021-05-03 13:49:52,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 130 transitions. [2021-05-03 13:49:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:52,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,704 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 13:49:52,917 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1708400907, now seen corresponding path program 11 times [2021-05-03 13:49:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846636205] [2021-05-03 13:49:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846636205] [2021-05-03 13:49:52,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053442074] [2021-05-03 13:49:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:52,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:53,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:53,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027822999] [2021-05-03 13:49:53,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:53,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:53,037 INFO L87 Difference]: Start difference. First operand 63 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:53,129 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-05-03 13:49:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:49:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:53,130 INFO L225 Difference]: With dead ends: 160 [2021-05-03 13:49:53,130 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 13:49:53,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:49:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 13:49:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2021-05-03 13:49:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.217391304347826) internal successors, (153), 69 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 153 transitions. [2021-05-03 13:49:53,133 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 153 transitions. Word has length 16 [2021-05-03 13:49:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:53,133 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 153 transitions. [2021-05-03 13:49:53,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 153 transitions. [2021-05-03 13:49:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:53,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:53,134 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,345 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1243809803, now seen corresponding path program 12 times [2021-05-03 13:49:53,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601917222] [2021-05-03 13:49:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601917222] [2021-05-03 13:49:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754920629] [2021-05-03 13:49:53,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:53,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:49:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:53,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:53,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252625306] [2021-05-03 13:49:53,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:53,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:53,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:53,503 INFO L87 Difference]: Start difference. First operand 70 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:53,641 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2021-05-03 13:49:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:49:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:53,642 INFO L225 Difference]: With dead ends: 114 [2021-05-03 13:49:53,642 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 13:49:53,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:49:53,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 13:49:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 72. [2021-05-03 13:49:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-05-03 13:49:53,646 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 16 [2021-05-03 13:49:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:53,646 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-05-03 13:49:53,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-05-03 13:49:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:53,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:53,647 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 13:49:53,857 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash -119765041, now seen corresponding path program 13 times [2021-05-03 13:49:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675553029] [2021-05-03 13:49:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675553029] [2021-05-03 13:49:53,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237687347] [2021-05-03 13:49:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729078775] [2021-05-03 13:49:53,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:53,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:53,967 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:54,101 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2021-05-03 13:49:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:49:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:54,104 INFO L225 Difference]: With dead ends: 132 [2021-05-03 13:49:54,104 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 13:49:54,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 13:49:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-05-03 13:49:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 71 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 153 transitions. [2021-05-03 13:49:54,110 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 153 transitions. Word has length 16 [2021-05-03 13:49:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:54,110 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 153 transitions. [2021-05-03 13:49:54,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 153 transitions. [2021-05-03 13:49:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:54,110 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:54,110 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:54,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 13:49:54,321 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -841282353, now seen corresponding path program 14 times [2021-05-03 13:49:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:54,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376973315] [2021-05-03 13:49:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376973315] [2021-05-03 13:49:54,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708977515] [2021-05-03 13:49:54,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 13:49:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537285925] [2021-05-03 13:49:54,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:54,442 INFO L87 Difference]: Start difference. First operand 72 states and 153 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:54,569 INFO L93 Difference]: Finished difference Result 186 states and 367 transitions. [2021-05-03 13:49:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:49:54,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:54,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:54,572 INFO L225 Difference]: With dead ends: 186 [2021-05-03 13:49:54,572 INFO L226 Difference]: Without dead ends: 186 [2021-05-03 13:49:54,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:49:54,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-03 13:49:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 84. [2021-05-03 13:49:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 192 transitions. [2021-05-03 13:49:54,585 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 192 transitions. Word has length 16 [2021-05-03 13:49:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:54,586 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 192 transitions. [2021-05-03 13:49:54,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 192 transitions. [2021-05-03 13:49:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:54,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:54,586 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:54,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 13:49:54,797 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1305873457, now seen corresponding path program 15 times [2021-05-03 13:49:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210150374] [2021-05-03 13:49:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:54,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210150374] [2021-05-03 13:49:54,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408824216] [2021-05-03 13:49:54,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 13:49:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:54,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:54,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 13:49:54,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644085122] [2021-05-03 13:49:54,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:54,919 INFO L87 Difference]: Start difference. First operand 84 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,070 INFO L93 Difference]: Finished difference Result 157 states and 310 transitions. [2021-05-03 13:49:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:49:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,071 INFO L225 Difference]: With dead ends: 157 [2021-05-03 13:49:55,071 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 13:49:55,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:49:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 13:49:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 84. [2021-05-03 13:49:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 191 transitions. [2021-05-03 13:49:55,074 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 191 transitions. Word has length 16 [2021-05-03 13:49:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,074 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 191 transitions. [2021-05-03 13:49:55,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 191 transitions. [2021-05-03 13:49:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:55,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,075 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:55,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-03 13:49:55,285 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1339472685, now seen corresponding path program 16 times [2021-05-03 13:49:55,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:55,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825880533] [2021-05-03 13:49:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825880533] [2021-05-03 13:49:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065848031] [2021-05-03 13:49:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:55,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:55,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:55,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 13:49:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106442606] [2021-05-03 13:49:55,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:49:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:49:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:55,401 INFO L87 Difference]: Start difference. First operand 84 states and 191 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,565 INFO L93 Difference]: Finished difference Result 146 states and 304 transitions. [2021-05-03 13:49:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:49:55,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,566 INFO L225 Difference]: With dead ends: 146 [2021-05-03 13:49:55,566 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 13:49:55,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:49:55,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 13:49:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 94. [2021-05-03 13:49:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-05-03 13:49:55,571 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 16 [2021-05-03 13:49:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,571 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-05-03 13:49:55,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-05-03 13:49:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:55,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,571 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:55,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,785 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:55,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1363701933, now seen corresponding path program 17 times [2021-05-03 13:49:55,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:55,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548751112] [2021-05-03 13:49:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548751112] [2021-05-03 13:49:55,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345004734] [2021-05-03 13:49:55,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:55,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:55,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 13:49:55,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547762090] [2021-05-03 13:49:55,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:55,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:55,897 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,961 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2021-05-03 13:49:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,961 INFO L225 Difference]: With dead ends: 128 [2021-05-03 13:49:55,961 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 13:49:55,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 13:49:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-05-03 13:49:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.391304347826087) internal successors, (220), 92 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2021-05-03 13:49:55,965 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 16 [2021-05-03 13:49:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,965 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2021-05-03 13:49:55,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2021-05-03 13:49:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:55,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,965 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:56,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 13:49:56,188 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:56,188 INFO L82 PathProgramCache]: Analyzing trace with hash -351009401, now seen corresponding path program 18 times [2021-05-03 13:49:56,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:56,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992091380] [2021-05-03 13:49:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992091380] [2021-05-03 13:49:56,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717744841] [2021-05-03 13:49:56,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:49:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:56,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:56,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733252418] [2021-05-03 13:49:56,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:56,323 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:56,443 INFO L93 Difference]: Finished difference Result 128 states and 288 transitions. [2021-05-03 13:49:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:49:56,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:56,444 INFO L225 Difference]: With dead ends: 128 [2021-05-03 13:49:56,444 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 13:49:56,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:49:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 13:49:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-05-03 13:49:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.422680412371134) internal successors, (235), 97 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2021-05-03 13:49:56,451 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 16 [2021-05-03 13:49:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:56,451 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2021-05-03 13:49:56,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2021-05-03 13:49:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:56,451 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:56,451 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:56,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 13:49:56,665 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1795161359, now seen corresponding path program 19 times [2021-05-03 13:49:56,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:56,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488165695] [2021-05-03 13:49:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488165695] [2021-05-03 13:49:56,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828595394] [2021-05-03 13:49:56,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:56,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:56,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42311049] [2021-05-03 13:49:56,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:56,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:56,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:56,797 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:56,896 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-05-03 13:49:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:49:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:56,897 INFO L225 Difference]: With dead ends: 175 [2021-05-03 13:49:56,897 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 13:49:56,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:49:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 13:49:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 101. [2021-05-03 13:49:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.46) internal successors, (246), 100 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 246 transitions. [2021-05-03 13:49:56,900 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 246 transitions. Word has length 16 [2021-05-03 13:49:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:56,901 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 246 transitions. [2021-05-03 13:49:56,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 246 transitions. [2021-05-03 13:49:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:56,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:56,901 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:57,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,109 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1928351131, now seen corresponding path program 20 times [2021-05-03 13:49:57,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:57,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502129189] [2021-05-03 13:49:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502129189] [2021-05-03 13:49:57,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687318035] [2021-05-03 13:49:57,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:57,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:57,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499876433] [2021-05-03 13:49:57,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:57,240 INFO L87 Difference]: Start difference. First operand 101 states and 246 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:57,392 INFO L93 Difference]: Finished difference Result 143 states and 309 transitions. [2021-05-03 13:49:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:49:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:57,393 INFO L225 Difference]: With dead ends: 143 [2021-05-03 13:49:57,393 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 13:49:57,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:49:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 13:49:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-05-03 13:49:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4329896907216493) internal successors, (236), 97 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 236 transitions. [2021-05-03 13:49:57,400 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 236 transitions. Word has length 16 [2021-05-03 13:49:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:57,400 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 236 transitions. [2021-05-03 13:49:57,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 236 transitions. [2021-05-03 13:49:57,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:57,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:57,401 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:57,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 13:49:57,617 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash 435044619, now seen corresponding path program 21 times [2021-05-03 13:49:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:57,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001619410] [2021-05-03 13:49:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001619410] [2021-05-03 13:49:57,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121796039] [2021-05-03 13:49:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:57,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:57,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820583395] [2021-05-03 13:49:57,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:57,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:57,732 INFO L87 Difference]: Start difference. First operand 98 states and 236 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:57,852 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-05-03 13:49:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:49:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:57,853 INFO L225 Difference]: With dead ends: 189 [2021-05-03 13:49:57,853 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 13:49:57,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 13:49:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 106. [2021-05-03 13:49:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5047619047619047) internal successors, (263), 105 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 263 transitions. [2021-05-03 13:49:57,857 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 263 transitions. Word has length 16 [2021-05-03 13:49:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:57,857 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 263 transitions. [2021-05-03 13:49:57,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,857 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 263 transitions. [2021-05-03 13:49:57,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:57,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:57,858 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,061 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,061 INFO L82 PathProgramCache]: Analyzing trace with hash -29546485, now seen corresponding path program 22 times [2021-05-03 13:49:58,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674279646] [2021-05-03 13:49:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674279646] [2021-05-03 13:49:58,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874649695] [2021-05-03 13:49:58,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:58,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:58,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:58,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:58,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:58,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479686278] [2021-05-03 13:49:58,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:58,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:58,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:58,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:58,165 INFO L87 Difference]: Start difference. First operand 106 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:58,315 INFO L93 Difference]: Finished difference Result 179 states and 382 transitions. [2021-05-03 13:49:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:49:58,316 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:58,316 INFO L225 Difference]: With dead ends: 179 [2021-05-03 13:49:58,316 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 13:49:58,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:49:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 13:49:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 101. [2021-05-03 13:49:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.44) internal successors, (244), 100 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 244 transitions. [2021-05-03 13:49:58,320 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 244 transitions. Word has length 16 [2021-05-03 13:49:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:58,320 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 244 transitions. [2021-05-03 13:49:58,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 244 transitions. [2021-05-03 13:49:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:58,320 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:58,320 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 13:49:58,538 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash -63145713, now seen corresponding path program 23 times [2021-05-03 13:49:58,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972329688] [2021-05-03 13:49:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972329688] [2021-05-03 13:49:58,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183741368] [2021-05-03 13:49:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:58,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:58,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 13:49:58,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878357871] [2021-05-03 13:49:58,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:58,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:58,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:58,650 INFO L87 Difference]: Start difference. First operand 101 states and 244 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:58,775 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-05-03 13:49:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:49:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:58,776 INFO L225 Difference]: With dead ends: 150 [2021-05-03 13:49:58,776 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 13:49:58,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 13:49:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2021-05-03 13:49:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.42) internal successors, (242), 100 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 242 transitions. [2021-05-03 13:49:58,779 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 242 transitions. Word has length 16 [2021-05-03 13:49:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:58,779 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 242 transitions. [2021-05-03 13:49:58,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 242 transitions. [2021-05-03 13:49:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:58,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:58,780 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 13:49:58,981 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1083715573, now seen corresponding path program 24 times [2021-05-03 13:49:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520947044] [2021-05-03 13:49:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520947044] [2021-05-03 13:49:59,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779412841] [2021-05-03 13:49:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 13:49:59,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:59,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 13:49:59,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743370250] [2021-05-03 13:49:59,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:59,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:59,077 INFO L87 Difference]: Start difference. First operand 101 states and 242 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:59,134 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2021-05-03 13:49:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:49:59,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:59,134 INFO L225 Difference]: With dead ends: 114 [2021-05-03 13:49:59,134 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 13:49:59,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:49:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 13:49:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2021-05-03 13:49:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.41) internal successors, (241), 100 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 241 transitions. [2021-05-03 13:49:59,138 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 241 transitions. Word has length 16 [2021-05-03 13:49:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:59,138 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 241 transitions. [2021-05-03 13:49:59,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 241 transitions. [2021-05-03 13:49:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:59,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:59,139 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:59,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 13:49:59,359 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash 977688019, now seen corresponding path program 25 times [2021-05-03 13:49:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:59,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117147640] [2021-05-03 13:49:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117147640] [2021-05-03 13:49:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173808670] [2021-05-03 13:49:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:59,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 13:49:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465658015] [2021-05-03 13:49:59,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:49:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:49:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:59,481 INFO L87 Difference]: Start difference. First operand 101 states and 241 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:59,600 INFO L93 Difference]: Finished difference Result 167 states and 364 transitions. [2021-05-03 13:49:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:49:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:49:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:59,601 INFO L225 Difference]: With dead ends: 167 [2021-05-03 13:49:59,601 INFO L226 Difference]: Without dead ends: 167 [2021-05-03 13:49:59,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:49:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-03 13:49:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 104. [2021-05-03 13:49:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.436893203883495) internal successors, (251), 103 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 251 transitions. [2021-05-03 13:49:59,604 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 251 transitions. Word has length 16 [2021-05-03 13:49:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:59,604 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 251 transitions. [2021-05-03 13:49:59,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 251 transitions. [2021-05-03 13:49:59,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:49:59,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:59,605 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:59,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,821 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash 935675603, now seen corresponding path program 26 times [2021-05-03 13:49:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:59,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844356482] [2021-05-03 13:49:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844356482] [2021-05-03 13:49:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676306785] [2021-05-03 13:49:59,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:59,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:59,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:59,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 13:49:59,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483871030] [2021-05-03 13:49:59,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:59,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:59,933 INFO L87 Difference]: Start difference. First operand 104 states and 251 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:00,047 INFO L93 Difference]: Finished difference Result 217 states and 462 transitions. [2021-05-03 13:50:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:00,049 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:50:00,049 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:50:00,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:50:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 115. [2021-05-03 13:50:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.526315789473684) internal successors, (288), 114 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2021-05-03 13:50:00,052 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 16 [2021-05-03 13:50:00,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:00,053 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2021-05-03 13:50:00,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,053 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2021-05-03 13:50:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:00,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:00,053 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 13:50:00,254 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1507130409, now seen corresponding path program 27 times [2021-05-03 13:50:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299011154] [2021-05-03 13:50:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:00,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299011154] [2021-05-03 13:50:00,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558072410] [2021-05-03 13:50:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:00,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 13:50:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:00,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-05-03 13:50:00,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086209683] [2021-05-03 13:50:00,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:00,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:00,372 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:00,547 INFO L93 Difference]: Finished difference Result 201 states and 430 transitions. [2021-05-03 13:50:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:50:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:00,548 INFO L225 Difference]: With dead ends: 201 [2021-05-03 13:50:00,548 INFO L226 Difference]: Without dead ends: 198 [2021-05-03 13:50:00,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:50:00,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-03 13:50:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2021-05-03 13:50:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 265 transitions. [2021-05-03 13:50:00,552 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 265 transitions. Word has length 16 [2021-05-03 13:50:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:00,552 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 265 transitions. [2021-05-03 13:50:00,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 265 transitions. [2021-05-03 13:50:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:00,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:00,552 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,774 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2042360211, now seen corresponding path program 28 times [2021-05-03 13:50:00,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992819094] [2021-05-03 13:50:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992819094] [2021-05-03 13:50:00,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530581113] [2021-05-03 13:50:00,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 13:50:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923575193] [2021-05-03 13:50:00,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:00,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:00,903 INFO L87 Difference]: Start difference. First operand 109 states and 265 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:01,082 INFO L93 Difference]: Finished difference Result 183 states and 400 transitions. [2021-05-03 13:50:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:50:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:01,083 INFO L225 Difference]: With dead ends: 183 [2021-05-03 13:50:01,083 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 13:50:01,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 13:50:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 122. [2021-05-03 13:50:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4958677685950414) internal successors, (302), 121 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 302 transitions. [2021-05-03 13:50:01,087 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 302 transitions. Word has length 16 [2021-05-03 13:50:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:01,087 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 302 transitions. [2021-05-03 13:50:01,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 302 transitions. [2021-05-03 13:50:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:01,087 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:01,087 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:01,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,290 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash -601783285, now seen corresponding path program 29 times [2021-05-03 13:50:01,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:01,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39122742] [2021-05-03 13:50:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39122742] [2021-05-03 13:50:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319686892] [2021-05-03 13:50:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:01,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:01,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:01,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:01,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 13:50:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526731640] [2021-05-03 13:50:01,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:01,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:01,512 INFO L87 Difference]: Start difference. First operand 122 states and 302 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:01,713 INFO L93 Difference]: Finished difference Result 223 states and 473 transitions. [2021-05-03 13:50:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:01,714 INFO L225 Difference]: With dead ends: 223 [2021-05-03 13:50:01,714 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 13:50:01,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 13:50:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2021-05-03 13:50:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.475177304964539) internal successors, (349), 141 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 349 transitions. [2021-05-03 13:50:01,718 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 349 transitions. Word has length 17 [2021-05-03 13:50:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:01,719 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 349 transitions. [2021-05-03 13:50:01,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 349 transitions. [2021-05-03 13:50:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:01,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:01,719 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:01,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 13:50:01,939 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash 838349055, now seen corresponding path program 30 times [2021-05-03 13:50:01,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:01,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622567509] [2021-05-03 13:50:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:02,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622567509] [2021-05-03 13:50:02,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895992644] [2021-05-03 13:50:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:02,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:02,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:02,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:02,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 13:50:02,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076715611] [2021-05-03 13:50:02,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:02,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:02,157 INFO L87 Difference]: Start difference. First operand 142 states and 349 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:02,294 INFO L93 Difference]: Finished difference Result 253 states and 530 transitions. [2021-05-03 13:50:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:02,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:02,296 INFO L225 Difference]: With dead ends: 253 [2021-05-03 13:50:02,296 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 13:50:02,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 13:50:02,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 149. [2021-05-03 13:50:02,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.527027027027027) internal successors, (374), 148 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 374 transitions. [2021-05-03 13:50:02,300 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 374 transitions. Word has length 17 [2021-05-03 13:50:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:02,300 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 374 transitions. [2021-05-03 13:50:02,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 374 transitions. [2021-05-03 13:50:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:02,301 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:02,301 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:02,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 13:50:02,517 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1841915517, now seen corresponding path program 31 times [2021-05-03 13:50:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:02,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585044646] [2021-05-03 13:50:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:02,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585044646] [2021-05-03 13:50:02,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172054065] [2021-05-03 13:50:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:02,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:02,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 13:50:02,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470872164] [2021-05-03 13:50:02,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:02,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:02,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:02,744 INFO L87 Difference]: Start difference. First operand 149 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:02,923 INFO L93 Difference]: Finished difference Result 239 states and 510 transitions. [2021-05-03 13:50:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:02,925 INFO L225 Difference]: With dead ends: 239 [2021-05-03 13:50:02,925 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 13:50:02,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 13:50:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 148. [2021-05-03 13:50:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-05-03 13:50:02,929 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-05-03 13:50:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:02,929 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-05-03 13:50:02,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-05-03 13:50:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:02,930 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:02,930 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:03,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-03 13:50:03,141 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1409803861, now seen corresponding path program 32 times [2021-05-03 13:50:03,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:03,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658602691] [2021-05-03 13:50:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658602691] [2021-05-03 13:50:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714539616] [2021-05-03 13:50:03,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:03,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:03,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 13:50:03,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645806013] [2021-05-03 13:50:03,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:03,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:03,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:03,340 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:03,473 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-05-03 13:50:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:03,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:03,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:03,474 INFO L225 Difference]: With dead ends: 224 [2021-05-03 13:50:03,474 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:50:03,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:50:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2021-05-03 13:50:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.5238095238095237) internal successors, (371), 147 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 371 transitions. [2021-05-03 13:50:03,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 371 transitions. Word has length 17 [2021-05-03 13:50:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:03,478 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 371 transitions. [2021-05-03 13:50:03,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 371 transitions. [2021-05-03 13:50:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:03,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:03,478 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:03,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,697 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:03,697 INFO L82 PathProgramCache]: Analyzing trace with hash 437462331, now seen corresponding path program 33 times [2021-05-03 13:50:03,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:03,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171438207] [2021-05-03 13:50:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171438207] [2021-05-03 13:50:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358554859] [2021-05-03 13:50:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:03,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:03,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 13:50:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531305626] [2021-05-03 13:50:03,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:03,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:03,904 INFO L87 Difference]: Start difference. First operand 148 states and 371 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:04,020 INFO L93 Difference]: Finished difference Result 218 states and 492 transitions. [2021-05-03 13:50:04,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:50:04,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:04,022 INFO L225 Difference]: With dead ends: 218 [2021-05-03 13:50:04,022 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 13:50:04,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:04,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 13:50:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 157. [2021-05-03 13:50:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.551282051282051) internal successors, (398), 156 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 398 transitions. [2021-05-03 13:50:04,026 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 398 transitions. Word has length 17 [2021-05-03 13:50:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:04,026 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 398 transitions. [2021-05-03 13:50:04,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 398 transitions. [2021-05-03 13:50:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:04,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:04,027 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:04,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 13:50:04,248 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:04,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2052165055, now seen corresponding path program 34 times [2021-05-03 13:50:04,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:04,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253253748] [2021-05-03 13:50:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253253748] [2021-05-03 13:50:04,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325210942] [2021-05-03 13:50:04,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:04,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:04,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:04,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:04,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 13:50:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343565622] [2021-05-03 13:50:04,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:04,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:04,480 INFO L87 Difference]: Start difference. First operand 157 states and 398 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:04,598 INFO L93 Difference]: Finished difference Result 220 states and 491 transitions. [2021-05-03 13:50:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:04,599 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:50:04,600 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 13:50:04,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 13:50:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 156. [2021-05-03 13:50:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-05-03 13:50:04,604 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-05-03 13:50:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:04,604 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-05-03 13:50:04,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-05-03 13:50:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:04,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:04,605 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:04,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 13:50:04,826 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -27128773, now seen corresponding path program 35 times [2021-05-03 13:50:04,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:04,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893357350] [2021-05-03 13:50:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893357350] [2021-05-03 13:50:04,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296924048] [2021-05-03 13:50:04,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:04,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:04,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:05,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 13:50:05,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828926303] [2021-05-03 13:50:05,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:05,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:05,079 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,210 INFO L93 Difference]: Finished difference Result 203 states and 463 transitions. [2021-05-03 13:50:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,211 INFO L225 Difference]: With dead ends: 203 [2021-05-03 13:50:05,211 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 13:50:05,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 13:50:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-05-03 13:50:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.535483870967742) internal successors, (393), 155 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 393 transitions. [2021-05-03 13:50:05,215 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 393 transitions. Word has length 17 [2021-05-03 13:50:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,215 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 393 transitions. [2021-05-03 13:50:05,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 393 transitions. [2021-05-03 13:50:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:05,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,216 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:05,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,429 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 894875775, now seen corresponding path program 36 times [2021-05-03 13:50:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912047402] [2021-05-03 13:50:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912047402] [2021-05-03 13:50:05,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366621826] [2021-05-03 13:50:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:05,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:05,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 13:50:05,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137239567] [2021-05-03 13:50:05,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:05,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:05,628 INFO L87 Difference]: Start difference. First operand 156 states and 393 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,811 INFO L93 Difference]: Finished difference Result 276 states and 609 transitions. [2021-05-03 13:50:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,813 INFO L225 Difference]: With dead ends: 276 [2021-05-03 13:50:05,813 INFO L226 Difference]: Without dead ends: 259 [2021-05-03 13:50:05,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-03 13:50:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2021-05-03 13:50:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.604651162790698) internal successors, (448), 172 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 448 transitions. [2021-05-03 13:50:05,818 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 448 transitions. Word has length 17 [2021-05-03 13:50:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,819 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 448 transitions. [2021-05-03 13:50:05,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 448 transitions. [2021-05-03 13:50:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:05,819 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,819 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,033 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1785388797, now seen corresponding path program 37 times [2021-05-03 13:50:06,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737453301] [2021-05-03 13:50:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737453301] [2021-05-03 13:50:06,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316159857] [2021-05-03 13:50:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:06,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 13:50:06,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344575970] [2021-05-03 13:50:06,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:06,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:06,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:06,264 INFO L87 Difference]: Start difference. First operand 173 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:06,436 INFO L93 Difference]: Finished difference Result 277 states and 604 transitions. [2021-05-03 13:50:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:06,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:06,438 INFO L225 Difference]: With dead ends: 277 [2021-05-03 13:50:06,438 INFO L226 Difference]: Without dead ends: 261 [2021-05-03 13:50:06,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-03 13:50:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2021-05-03 13:50:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.57396449704142) internal successors, (435), 169 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 435 transitions. [2021-05-03 13:50:06,442 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 435 transitions. Word has length 17 [2021-05-03 13:50:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:06,442 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 435 transitions. [2021-05-03 13:50:06,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 435 transitions. [2021-05-03 13:50:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:06,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:06,443 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,652 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,652 INFO L82 PathProgramCache]: Analyzing trace with hash 430284671, now seen corresponding path program 38 times [2021-05-03 13:50:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352305703] [2021-05-03 13:50:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352305703] [2021-05-03 13:50:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546962554] [2021-05-03 13:50:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:06,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 13:50:06,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367151955] [2021-05-03 13:50:06,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:06,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:06,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:06,866 INFO L87 Difference]: Start difference. First operand 170 states and 435 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,069 INFO L93 Difference]: Finished difference Result 262 states and 576 transitions. [2021-05-03 13:50:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,070 INFO L225 Difference]: With dead ends: 262 [2021-05-03 13:50:07,070 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 13:50:07,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 13:50:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2021-05-03 13:50:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5773809523809526) internal successors, (433), 168 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 433 transitions. [2021-05-03 13:50:07,075 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 433 transitions. Word has length 17 [2021-05-03 13:50:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,075 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 433 transitions. [2021-05-03 13:50:07,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 433 transitions. [2021-05-03 13:50:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:07,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,076 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,298 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash 396685443, now seen corresponding path program 39 times [2021-05-03 13:50:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609649576] [2021-05-03 13:50:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:07,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609649576] [2021-05-03 13:50:07,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200827872] [2021-05-03 13:50:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 13:50:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:07,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:07,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:07,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 13:50:07,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999238144] [2021-05-03 13:50:07,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:07,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:07,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:07,628 INFO L87 Difference]: Start difference. First operand 169 states and 433 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,761 INFO L93 Difference]: Finished difference Result 233 states and 528 transitions. [2021-05-03 13:50:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:07,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,762 INFO L225 Difference]: With dead ends: 233 [2021-05-03 13:50:07,762 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 13:50:07,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 13:50:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 175. [2021-05-03 13:50:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5402298850574714) internal successors, (442), 174 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 442 transitions. [2021-05-03 13:50:07,766 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 442 transitions. Word has length 17 [2021-05-03 13:50:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,766 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 442 transitions. [2021-05-03 13:50:07,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 442 transitions. [2021-05-03 13:50:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:07,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,767 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,985 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash 852863359, now seen corresponding path program 40 times [2021-05-03 13:50:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338043717] [2021-05-03 13:50:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338043717] [2021-05-03 13:50:08,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28099709] [2021-05-03 13:50:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:08,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:08,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:08,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:08,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 13:50:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289406050] [2021-05-03 13:50:08,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:08,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:08,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:08,182 INFO L87 Difference]: Start difference. First operand 175 states and 442 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,303 INFO L93 Difference]: Finished difference Result 259 states and 585 transitions. [2021-05-03 13:50:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:08,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,305 INFO L225 Difference]: With dead ends: 259 [2021-05-03 13:50:08,305 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 13:50:08,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 13:50:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-05-03 13:50:08,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.569060773480663) internal successors, (465), 181 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 465 transitions. [2021-05-03 13:50:08,309 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 465 transitions. Word has length 17 [2021-05-03 13:50:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,309 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 465 transitions. [2021-05-03 13:50:08,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 465 transitions. [2021-05-03 13:50:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:08,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,310 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:08,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,531 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1827401213, now seen corresponding path program 41 times [2021-05-03 13:50:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:08,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584396161] [2021-05-03 13:50:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584396161] [2021-05-03 13:50:08,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712749820] [2021-05-03 13:50:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:08,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:08,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 13:50:08,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064960156] [2021-05-03 13:50:08,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:08,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:08,721 INFO L87 Difference]: Start difference. First operand 182 states and 465 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,829 INFO L93 Difference]: Finished difference Result 247 states and 565 transitions. [2021-05-03 13:50:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:50:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,831 INFO L225 Difference]: With dead ends: 247 [2021-05-03 13:50:08,831 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 13:50:08,831 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 13:50:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 183. [2021-05-03 13:50:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-05-03 13:50:08,835 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 17 [2021-05-03 13:50:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,835 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-05-03 13:50:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-05-03 13:50:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:50:08,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,835 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,045 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1424318165, now seen corresponding path program 42 times [2021-05-03 13:50:09,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114129585] [2021-05-03 13:50:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114129585] [2021-05-03 13:50:09,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244122929] [2021-05-03 13:50:09,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:09,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:50:09,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:09,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-03 13:50:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885517975] [2021-05-03 13:50:09,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:09,215 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:09,319 INFO L93 Difference]: Finished difference Result 231 states and 537 transitions. [2021-05-03 13:50:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:09,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:50:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:09,320 INFO L225 Difference]: With dead ends: 231 [2021-05-03 13:50:09,320 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 13:50:09,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 13:50:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2021-05-03 13:50:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-05-03 13:50:09,324 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 17 [2021-05-03 13:50:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:09,324 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-05-03 13:50:09,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-05-03 13:50:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:09,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:09,324 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,537 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1448785397, now seen corresponding path program 43 times [2021-05-03 13:50:09,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630383808] [2021-05-03 13:50:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630383808] [2021-05-03 13:50:09,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393000323] [2021-05-03 13:50:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:09,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 13:50:09,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62158564] [2021-05-03 13:50:09,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:09,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:09,680 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:09,770 INFO L93 Difference]: Finished difference Result 295 states and 722 transitions. [2021-05-03 13:50:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:09,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:09,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:09,772 INFO L225 Difference]: With dead ends: 295 [2021-05-03 13:50:09,772 INFO L226 Difference]: Without dead ends: 281 [2021-05-03 13:50:09,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:50:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-03 13:50:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-05-03 13:50:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-05-03 13:50:09,776 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 18 [2021-05-03 13:50:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:09,776 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-05-03 13:50:09,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-05-03 13:50:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:09,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:09,776 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-03 13:50:09,993 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1017532901, now seen corresponding path program 44 times [2021-05-03 13:50:09,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905685830] [2021-05-03 13:50:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905685830] [2021-05-03 13:50:10,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299460142] [2021-05-03 13:50:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:10,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:10,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 13:50:10,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279301508] [2021-05-03 13:50:10,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:10,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:10,114 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:10,204 INFO L93 Difference]: Finished difference Result 302 states and 747 transitions. [2021-05-03 13:50:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:10,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:10,206 INFO L225 Difference]: With dead ends: 302 [2021-05-03 13:50:10,206 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 13:50:10,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 13:50:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 183. [2021-05-03 13:50:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.576923076923077) internal successors, (469), 182 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2021-05-03 13:50:10,211 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 18 [2021-05-03 13:50:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:10,211 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2021-05-03 13:50:10,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2021-05-03 13:50:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:10,211 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:10,211 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:10,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,433 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1381829455, now seen corresponding path program 45 times [2021-05-03 13:50:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:10,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458990867] [2021-05-03 13:50:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458990867] [2021-05-03 13:50:10,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728204482] [2021-05-03 13:50:10,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:10,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:10,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:10,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:10,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632928534] [2021-05-03 13:50:10,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:10,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:10,592 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:10,859 INFO L93 Difference]: Finished difference Result 476 states and 1093 transitions. [2021-05-03 13:50:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:50:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:10,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:10,861 INFO L225 Difference]: With dead ends: 476 [2021-05-03 13:50:10,861 INFO L226 Difference]: Without dead ends: 474 [2021-05-03 13:50:10,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-05-03 13:50:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 222. [2021-05-03 13:50:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.746606334841629) internal successors, (607), 221 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 607 transitions. [2021-05-03 13:50:10,885 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 607 transitions. Word has length 18 [2021-05-03 13:50:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:10,886 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 607 transitions. [2021-05-03 13:50:10,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 607 transitions. [2021-05-03 13:50:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:10,886 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:10,886 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:11,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 13:50:11,097 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1953284261, now seen corresponding path program 46 times [2021-05-03 13:50:11,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:11,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695331232] [2021-05-03 13:50:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695331232] [2021-05-03 13:50:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15937377] [2021-05-03 13:50:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:11,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:11,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:11,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922051203] [2021-05-03 13:50:11,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:11,240 INFO L87 Difference]: Start difference. First operand 222 states and 607 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:11,512 INFO L93 Difference]: Finished difference Result 476 states and 1089 transitions. [2021-05-03 13:50:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:50:11,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:11,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:11,513 INFO L225 Difference]: With dead ends: 476 [2021-05-03 13:50:11,513 INFO L226 Difference]: Without dead ends: 470 [2021-05-03 13:50:11,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-03 13:50:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 205. [2021-05-03 13:50:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.661764705882353) internal successors, (543), 204 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 543 transitions. [2021-05-03 13:50:11,519 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 543 transitions. Word has length 18 [2021-05-03 13:50:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:11,519 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 543 transitions. [2021-05-03 13:50:11,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 543 transitions. [2021-05-03 13:50:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:11,520 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:11,520 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:11,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 13:50:11,737 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 21712715, now seen corresponding path program 47 times [2021-05-03 13:50:11,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:11,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136714643] [2021-05-03 13:50:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136714643] [2021-05-03 13:50:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135608029] [2021-05-03 13:50:11,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:11,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:11,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:11,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:11,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294661398] [2021-05-03 13:50:11,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:11,889 INFO L87 Difference]: Start difference. First operand 205 states and 543 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:12,117 INFO L93 Difference]: Finished difference Result 423 states and 962 transitions. [2021-05-03 13:50:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:50:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:12,119 INFO L225 Difference]: With dead ends: 423 [2021-05-03 13:50:12,119 INFO L226 Difference]: Without dead ends: 423 [2021-05-03 13:50:12,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-03 13:50:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 211. [2021-05-03 13:50:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.6904761904761907) internal successors, (565), 210 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 565 transitions. [2021-05-03 13:50:12,124 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 565 transitions. Word has length 18 [2021-05-03 13:50:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:12,124 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 565 transitions. [2021-05-03 13:50:12,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 565 transitions. [2021-05-03 13:50:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:12,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:12,125 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:12,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 13:50:12,349 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash -442878389, now seen corresponding path program 48 times [2021-05-03 13:50:12,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:12,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746512512] [2021-05-03 13:50:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746512512] [2021-05-03 13:50:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522223349] [2021-05-03 13:50:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:12,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:12,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:12,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:12,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:12,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:12,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:12,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408135815] [2021-05-03 13:50:12,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:12,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:12,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:12,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:12,484 INFO L87 Difference]: Start difference. First operand 211 states and 565 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:12,793 INFO L93 Difference]: Finished difference Result 326 states and 774 transitions. [2021-05-03 13:50:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:50:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:12,794 INFO L225 Difference]: With dead ends: 326 [2021-05-03 13:50:12,794 INFO L226 Difference]: Without dead ends: 322 [2021-05-03 13:50:12,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-03 13:50:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 205. [2021-05-03 13:50:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.6666666666666665) internal successors, (544), 204 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 544 transitions. [2021-05-03 13:50:12,798 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 544 transitions. Word has length 18 [2021-05-03 13:50:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 544 transitions. [2021-05-03 13:50:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 544 transitions. [2021-05-03 13:50:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:12,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:12,799 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:13,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 13:50:13,013 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1806453233, now seen corresponding path program 49 times [2021-05-03 13:50:13,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:13,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874261326] [2021-05-03 13:50:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874261326] [2021-05-03 13:50:13,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359394940] [2021-05-03 13:50:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:13,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:13,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737077717] [2021-05-03 13:50:13,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:13,146 INFO L87 Difference]: Start difference. First operand 205 states and 544 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:13,377 INFO L93 Difference]: Finished difference Result 460 states and 1057 transitions. [2021-05-03 13:50:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:13,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:13,379 INFO L225 Difference]: With dead ends: 460 [2021-05-03 13:50:13,379 INFO L226 Difference]: Without dead ends: 451 [2021-05-03 13:50:13,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:50:13,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-05-03 13:50:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 215. [2021-05-03 13:50:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.682242990654206) internal successors, (574), 214 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 574 transitions. [2021-05-03 13:50:13,384 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 574 transitions. Word has length 18 [2021-05-03 13:50:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:13,384 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 574 transitions. [2021-05-03 13:50:13,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 574 transitions. [2021-05-03 13:50:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:13,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:13,385 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:13,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 13:50:13,601 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1900768741, now seen corresponding path program 50 times [2021-05-03 13:50:13,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:13,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339251356] [2021-05-03 13:50:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339251356] [2021-05-03 13:50:13,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122646413] [2021-05-03 13:50:13,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:13,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:13,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:13,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024072341] [2021-05-03 13:50:13,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:13,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:13,800 INFO L87 Difference]: Start difference. First operand 215 states and 574 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:13,992 INFO L93 Difference]: Finished difference Result 374 states and 891 transitions. [2021-05-03 13:50:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:50:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:13,994 INFO L225 Difference]: With dead ends: 374 [2021-05-03 13:50:13,994 INFO L226 Difference]: Without dead ends: 365 [2021-05-03 13:50:13,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-03 13:50:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 215. [2021-05-03 13:50:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.6728971962616823) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2021-05-03 13:50:14,001 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 18 [2021-05-03 13:50:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:14,001 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2021-05-03 13:50:14,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2021-05-03 13:50:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:14,002 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:14,002 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:14,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 13:50:14,209 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 479126159, now seen corresponding path program 51 times [2021-05-03 13:50:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:14,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751814652] [2021-05-03 13:50:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:14,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751814652] [2021-05-03 13:50:14,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119477972] [2021-05-03 13:50:14,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:14,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:14,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 13:50:14,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866329325] [2021-05-03 13:50:14,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:14,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:14,358 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:14,585 INFO L93 Difference]: Finished difference Result 439 states and 1014 transitions. [2021-05-03 13:50:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:14,586 INFO L225 Difference]: With dead ends: 439 [2021-05-03 13:50:14,586 INFO L226 Difference]: Without dead ends: 436 [2021-05-03 13:50:14,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-03 13:50:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 233. [2021-05-03 13:50:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2021-05-03 13:50:14,591 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 18 [2021-05-03 13:50:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:14,591 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2021-05-03 13:50:14,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2021-05-03 13:50:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:14,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:14,592 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:14,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 13:50:14,814 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 14535055, now seen corresponding path program 52 times [2021-05-03 13:50:14,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:14,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445539029] [2021-05-03 13:50:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445539029] [2021-05-03 13:50:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4600631] [2021-05-03 13:50:14,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:14,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:14,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 13:50:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685988013] [2021-05-03 13:50:14,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:14,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:14,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:14,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:14,965 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:15,271 INFO L93 Difference]: Finished difference Result 389 states and 889 transitions. [2021-05-03 13:50:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:50:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:15,272 INFO L225 Difference]: With dead ends: 389 [2021-05-03 13:50:15,272 INFO L226 Difference]: Without dead ends: 383 [2021-05-03 13:50:15,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:50:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-03 13:50:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-05-03 13:50:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6511627906976742) internal successors, (570), 215 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 570 transitions. [2021-05-03 13:50:15,277 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 570 transitions. Word has length 18 [2021-05-03 13:50:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:15,278 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 570 transitions. [2021-05-03 13:50:15,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 570 transitions. [2021-05-03 13:50:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:15,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:15,278 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:15,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,493 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -19064173, now seen corresponding path program 53 times [2021-05-03 13:50:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:15,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382512962] [2021-05-03 13:50:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382512962] [2021-05-03 13:50:15,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646006007] [2021-05-03 13:50:15,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:15,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:15,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:15,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 13:50:15,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611130464] [2021-05-03 13:50:15,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:15,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:15,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:15,627 INFO L87 Difference]: Start difference. First operand 216 states and 570 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:15,909 INFO L93 Difference]: Finished difference Result 347 states and 818 transitions. [2021-05-03 13:50:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:50:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:15,911 INFO L225 Difference]: With dead ends: 347 [2021-05-03 13:50:15,911 INFO L226 Difference]: Without dead ends: 339 [2021-05-03 13:50:15,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:50:15,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-03 13:50:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 227. [2021-05-03 13:50:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.65929203539823) internal successors, (601), 226 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 601 transitions. [2021-05-03 13:50:15,916 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 601 transitions. Word has length 18 [2021-05-03 13:50:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:15,916 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 601 transitions. [2021-05-03 13:50:15,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 601 transitions. [2021-05-03 13:50:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:15,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:15,917 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:16,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 13:50:16,139 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1774041035, now seen corresponding path program 54 times [2021-05-03 13:50:16,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:16,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609793372] [2021-05-03 13:50:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609793372] [2021-05-03 13:50:16,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294580249] [2021-05-03 13:50:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:16,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:16,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-03 13:50:16,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411987936] [2021-05-03 13:50:16,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:16,296 INFO L87 Difference]: Start difference. First operand 227 states and 601 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:16,500 INFO L93 Difference]: Finished difference Result 526 states and 1217 transitions. [2021-05-03 13:50:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:16,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:16,502 INFO L225 Difference]: With dead ends: 526 [2021-05-03 13:50:16,502 INFO L226 Difference]: Without dead ends: 523 [2021-05-03 13:50:16,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-05-03 13:50:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 274. [2021-05-03 13:50:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7472527472527473) internal successors, (750), 273 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 750 transitions. [2021-05-03 13:50:16,508 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 750 transitions. Word has length 18 [2021-05-03 13:50:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:16,508 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 750 transitions. [2021-05-03 13:50:16,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 750 transitions. [2021-05-03 13:50:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:16,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:16,509 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:16,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,713 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1309449931, now seen corresponding path program 55 times [2021-05-03 13:50:16,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:16,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839868120] [2021-05-03 13:50:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:16,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839868120] [2021-05-03 13:50:16,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391308253] [2021-05-03 13:50:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:16,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:16,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-03 13:50:16,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694863625] [2021-05-03 13:50:16,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:16,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:16,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:16,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:16,891 INFO L87 Difference]: Start difference. First operand 274 states and 750 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:17,207 INFO L93 Difference]: Finished difference Result 468 states and 1095 transitions. [2021-05-03 13:50:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:50:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:17,210 INFO L225 Difference]: With dead ends: 468 [2021-05-03 13:50:17,210 INFO L226 Difference]: Without dead ends: 464 [2021-05-03 13:50:17,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:50:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-05-03 13:50:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 272. [2021-05-03 13:50:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.734317343173432) internal successors, (741), 271 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 741 transitions. [2021-05-03 13:50:17,216 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 741 transitions. Word has length 18 [2021-05-03 13:50:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:17,216 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 741 transitions. [2021-05-03 13:50:17,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 741 transitions. [2021-05-03 13:50:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:17,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:17,217 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:17,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-03 13:50:17,433 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1275850703, now seen corresponding path program 56 times [2021-05-03 13:50:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:17,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414784512] [2021-05-03 13:50:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414784512] [2021-05-03 13:50:17,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428612293] [2021-05-03 13:50:17,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:17,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:17,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:17,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:17,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 13:50:17,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912917622] [2021-05-03 13:50:17,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:17,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:17,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:17,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:17,655 INFO L87 Difference]: Start difference. First operand 272 states and 741 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:17,984 INFO L93 Difference]: Finished difference Result 487 states and 1167 transitions. [2021-05-03 13:50:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:50:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:17,986 INFO L225 Difference]: With dead ends: 487 [2021-05-03 13:50:17,986 INFO L226 Difference]: Without dead ends: 479 [2021-05-03 13:50:17,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:50:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-03 13:50:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 293. [2021-05-03 13:50:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.791095890410959) internal successors, (815), 292 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 815 transitions. [2021-05-03 13:50:17,993 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 815 transitions. Word has length 18 [2021-05-03 13:50:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:17,993 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 815 transitions. [2021-05-03 13:50:17,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 815 transitions. [2021-05-03 13:50:17,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:17,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:17,994 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:18,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,216 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash 234274635, now seen corresponding path program 57 times [2021-05-03 13:50:18,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243144427] [2021-05-03 13:50:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243144427] [2021-05-03 13:50:18,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971440843] [2021-05-03 13:50:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:18,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:18,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 13:50:18,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060044999] [2021-05-03 13:50:18,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:18,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:18,388 INFO L87 Difference]: Start difference. First operand 293 states and 815 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:18,674 INFO L93 Difference]: Finished difference Result 466 states and 1157 transitions. [2021-05-03 13:50:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:18,676 INFO L225 Difference]: With dead ends: 466 [2021-05-03 13:50:18,676 INFO L226 Difference]: Without dead ends: 454 [2021-05-03 13:50:18,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:50:18,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-03 13:50:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 312. [2021-05-03 13:50:18,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.8006430868167205) internal successors, (871), 311 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 871 transitions. [2021-05-03 13:50:18,682 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 871 transitions. Word has length 18 [2021-05-03 13:50:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:18,682 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 871 transitions. [2021-05-03 13:50:18,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,683 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 871 transitions. [2021-05-03 13:50:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:18,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:18,683 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:18,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,893 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1797099147, now seen corresponding path program 58 times [2021-05-03 13:50:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:18,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135911534] [2021-05-03 13:50:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135911534] [2021-05-03 13:50:18,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212143362] [2021-05-03 13:50:18,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:18,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:19,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 13:50:19,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351961491] [2021-05-03 13:50:19,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:19,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:19,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:19,022 INFO L87 Difference]: Start difference. First operand 312 states and 871 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,122 INFO L93 Difference]: Finished difference Result 436 states and 1155 transitions. [2021-05-03 13:50:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:19,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,124 INFO L225 Difference]: With dead ends: 436 [2021-05-03 13:50:19,124 INFO L226 Difference]: Without dead ends: 436 [2021-05-03 13:50:19,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-05-03 13:50:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2021-05-03 13:50:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.812698412698413) internal successors, (886), 315 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 886 transitions. [2021-05-03 13:50:19,128 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 886 transitions. Word has length 18 [2021-05-03 13:50:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,128 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 886 transitions. [2021-05-03 13:50:19,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,128 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 886 transitions. [2021-05-03 13:50:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:19,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,129 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:19,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,330 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1169170729, now seen corresponding path program 59 times [2021-05-03 13:50:19,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:19,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111950060] [2021-05-03 13:50:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111950060] [2021-05-03 13:50:19,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351986133] [2021-05-03 13:50:19,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:19,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:19,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:19,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:19,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113329287] [2021-05-03 13:50:19,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:19,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:19,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:19,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:19,462 INFO L87 Difference]: Start difference. First operand 316 states and 886 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,636 INFO L93 Difference]: Finished difference Result 389 states and 1033 transitions. [2021-05-03 13:50:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:19,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,637 INFO L225 Difference]: With dead ends: 389 [2021-05-03 13:50:19,637 INFO L226 Difference]: Without dead ends: 389 [2021-05-03 13:50:19,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:50:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-03 13:50:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 319. [2021-05-03 13:50:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8144654088050314) internal successors, (895), 318 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 895 transitions. [2021-05-03 13:50:19,646 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 895 transitions. Word has length 18 [2021-05-03 13:50:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,646 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 895 transitions. [2021-05-03 13:50:19,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 895 transitions. [2021-05-03 13:50:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:19,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,647 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:19,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 13:50:19,861 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 937613391, now seen corresponding path program 60 times [2021-05-03 13:50:19,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:19,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634093246] [2021-05-03 13:50:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634093246] [2021-05-03 13:50:19,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491385558] [2021-05-03 13:50:19,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:20,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:20,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665185878] [2021-05-03 13:50:20,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:20,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:20,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:20,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:20,014 INFO L87 Difference]: Start difference. First operand 319 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:20,212 INFO L93 Difference]: Finished difference Result 399 states and 1054 transitions. [2021-05-03 13:50:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:50:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:20,214 INFO L225 Difference]: With dead ends: 399 [2021-05-03 13:50:20,215 INFO L226 Difference]: Without dead ends: 399 [2021-05-03 13:50:20,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:50:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-05-03 13:50:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 322. [2021-05-03 13:50:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.8161993769470404) internal successors, (904), 321 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 904 transitions. [2021-05-03 13:50:20,220 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 904 transitions. Word has length 18 [2021-05-03 13:50:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:20,221 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 904 transitions. [2021-05-03 13:50:20,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 904 transitions. [2021-05-03 13:50:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:20,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:20,222 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:20,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:20,437 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1211183145, now seen corresponding path program 61 times [2021-05-03 13:50:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:20,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546885766] [2021-05-03 13:50:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546885766] [2021-05-03 13:50:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794542032] [2021-05-03 13:50:20,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:20,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:20,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309976616] [2021-05-03 13:50:20,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:20,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:20,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:20,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:20,563 INFO L87 Difference]: Start difference. First operand 322 states and 904 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:20,784 INFO L93 Difference]: Finished difference Result 497 states and 1220 transitions. [2021-05-03 13:50:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:50:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:20,785 INFO L225 Difference]: With dead ends: 497 [2021-05-03 13:50:20,785 INFO L226 Difference]: Without dead ends: 497 [2021-05-03 13:50:20,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=259, Invalid=443, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-05-03 13:50:20,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 319. [2021-05-03 13:50:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.8207547169811322) internal successors, (897), 318 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 897 transitions. [2021-05-03 13:50:20,790 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 897 transitions. Word has length 18 [2021-05-03 13:50:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:20,790 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 897 transitions. [2021-05-03 13:50:20,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 897 transitions. [2021-05-03 13:50:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:20,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:20,791 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:20,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 13:50:20,995 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:20,995 INFO L82 PathProgramCache]: Analyzing trace with hash -639728339, now seen corresponding path program 62 times [2021-05-03 13:50:20,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:20,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733112037] [2021-05-03 13:50:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733112037] [2021-05-03 13:50:21,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958505376] [2021-05-03 13:50:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:21,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961732211] [2021-05-03 13:50:21,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:21,140 INFO L87 Difference]: Start difference. First operand 319 states and 897 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:21,399 INFO L93 Difference]: Finished difference Result 422 states and 1069 transitions. [2021-05-03 13:50:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:50:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:21,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:21,400 INFO L225 Difference]: With dead ends: 422 [2021-05-03 13:50:21,400 INFO L226 Difference]: Without dead ends: 416 [2021-05-03 13:50:21,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-03 13:50:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 313. [2021-05-03 13:50:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.8108974358974357) internal successors, (877), 312 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 877 transitions. [2021-05-03 13:50:21,406 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 877 transitions. Word has length 18 [2021-05-03 13:50:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:21,406 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 877 transitions. [2021-05-03 13:50:21,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 877 transitions. [2021-05-03 13:50:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:21,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:21,407 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:21,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-03 13:50:21,621 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1723667411, now seen corresponding path program 63 times [2021-05-03 13:50:21,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:21,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376630514] [2021-05-03 13:50:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376630514] [2021-05-03 13:50:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841723538] [2021-05-03 13:50:21,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:21,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106278099] [2021-05-03 13:50:21,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:21,751 INFO L87 Difference]: Start difference. First operand 313 states and 877 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:21,972 INFO L93 Difference]: Finished difference Result 573 states and 1416 transitions. [2021-05-03 13:50:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:50:21,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:21,974 INFO L225 Difference]: With dead ends: 573 [2021-05-03 13:50:21,974 INFO L226 Difference]: Without dead ends: 570 [2021-05-03 13:50:21,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-03 13:50:21,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 353. [2021-05-03 13:50:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.875) internal successors, (1012), 352 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1012 transitions. [2021-05-03 13:50:21,980 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1012 transitions. Word has length 18 [2021-05-03 13:50:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:21,980 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1012 transitions. [2021-05-03 13:50:21,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1012 transitions. [2021-05-03 13:50:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:21,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:21,981 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:22,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 13:50:22,201 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1259076307, now seen corresponding path program 64 times [2021-05-03 13:50:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:22,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730706260] [2021-05-03 13:50:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730706260] [2021-05-03 13:50:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599705251] [2021-05-03 13:50:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:22,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:22,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102081166] [2021-05-03 13:50:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:22,320 INFO L87 Difference]: Start difference. First operand 353 states and 1012 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:22,601 INFO L93 Difference]: Finished difference Result 554 states and 1385 transitions. [2021-05-03 13:50:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:50:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:22,603 INFO L225 Difference]: With dead ends: 554 [2021-05-03 13:50:22,603 INFO L226 Difference]: Without dead ends: 550 [2021-05-03 13:50:22,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-03 13:50:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 334. [2021-05-03 13:50:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.8228228228228227) internal successors, (940), 333 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 940 transitions. [2021-05-03 13:50:22,610 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 940 transitions. Word has length 18 [2021-05-03 13:50:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:22,610 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 940 transitions. [2021-05-03 13:50:22,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 940 transitions. [2021-05-03 13:50:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:22,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:22,611 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:22,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:22,829 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1225477079, now seen corresponding path program 65 times [2021-05-03 13:50:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:22,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981969971] [2021-05-03 13:50:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981969971] [2021-05-03 13:50:22,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215682130] [2021-05-03 13:50:22,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:22,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:22,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927003106] [2021-05-03 13:50:22,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:22,965 INFO L87 Difference]: Start difference. First operand 334 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,209 INFO L93 Difference]: Finished difference Result 542 states and 1356 transitions. [2021-05-03 13:50:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,211 INFO L225 Difference]: With dead ends: 542 [2021-05-03 13:50:23,211 INFO L226 Difference]: Without dead ends: 534 [2021-05-03 13:50:23,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:50:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-03 13:50:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 348. [2021-05-03 13:50:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.829971181556196) internal successors, (982), 347 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 982 transitions. [2021-05-03 13:50:23,218 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 982 transitions. Word has length 18 [2021-05-03 13:50:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,218 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 982 transitions. [2021-05-03 13:50:23,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 982 transitions. [2021-05-03 13:50:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:23,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,219 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:23,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 13:50:23,440 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash 183901011, now seen corresponding path program 66 times [2021-05-03 13:50:23,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:23,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005178244] [2021-05-03 13:50:23,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005178244] [2021-05-03 13:50:23,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139973499] [2021-05-03 13:50:23,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:23,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:23,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:23,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 13:50:23,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800456709] [2021-05-03 13:50:23,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:23,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:23,561 INFO L87 Difference]: Start difference. First operand 348 states and 982 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,747 INFO L93 Difference]: Finished difference Result 473 states and 1218 transitions. [2021-05-03 13:50:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:50:23,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,749 INFO L225 Difference]: With dead ends: 473 [2021-05-03 13:50:23,749 INFO L226 Difference]: Without dead ends: 467 [2021-05-03 13:50:23,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-03 13:50:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 349. [2021-05-03 13:50:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.82183908045977) internal successors, (982), 348 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 982 transitions. [2021-05-03 13:50:23,754 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 982 transitions. Word has length 18 [2021-05-03 13:50:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,754 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 982 transitions. [2021-05-03 13:50:23,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 982 transitions. [2021-05-03 13:50:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:23,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,755 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:23,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,969 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:23,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1388993577, now seen corresponding path program 67 times [2021-05-03 13:50:23,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:23,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644490254] [2021-05-03 13:50:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644490254] [2021-05-03 13:50:24,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881983161] [2021-05-03 13:50:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:24,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:24,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 13:50:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940436198] [2021-05-03 13:50:24,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:24,112 INFO L87 Difference]: Start difference. First operand 349 states and 982 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:24,187 INFO L93 Difference]: Finished difference Result 405 states and 1105 transitions. [2021-05-03 13:50:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:24,188 INFO L225 Difference]: With dead ends: 405 [2021-05-03 13:50:24,188 INFO L226 Difference]: Without dead ends: 397 [2021-05-03 13:50:24,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-03 13:50:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 349. [2021-05-03 13:50:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.8189655172413794) internal successors, (981), 348 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 981 transitions. [2021-05-03 13:50:24,194 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 981 transitions. Word has length 18 [2021-05-03 13:50:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:24,194 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 981 transitions. [2021-05-03 13:50:24,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 981 transitions. [2021-05-03 13:50:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:24,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:24,195 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:24,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-05-03 13:50:24,395 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1365743627, now seen corresponding path program 68 times [2021-05-03 13:50:24,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:24,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360401813] [2021-05-03 13:50:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360401813] [2021-05-03 13:50:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537119759] [2021-05-03 13:50:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:24,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:24,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:24,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 13:50:24,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43455372] [2021-05-03 13:50:24,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:24,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:24,543 INFO L87 Difference]: Start difference. First operand 349 states and 981 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:24,811 INFO L93 Difference]: Finished difference Result 447 states and 1174 transitions. [2021-05-03 13:50:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:24,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:24,813 INFO L225 Difference]: With dead ends: 447 [2021-05-03 13:50:24,813 INFO L226 Difference]: Without dead ends: 447 [2021-05-03 13:50:24,814 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:50:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-03 13:50:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-05-03 13:50:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.818696883852691) internal successors, (995), 353 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 995 transitions. [2021-05-03 13:50:24,827 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 995 transitions. Word has length 18 [2021-05-03 13:50:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:24,827 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 995 transitions. [2021-05-03 13:50:24,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 995 transitions. [2021-05-03 13:50:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:24,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:24,827 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,028 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,028 INFO L82 PathProgramCache]: Analyzing trace with hash 63358731, now seen corresponding path program 69 times [2021-05-03 13:50:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406050445] [2021-05-03 13:50:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406050445] [2021-05-03 13:50:25,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688728366] [2021-05-03 13:50:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:25,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:25,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:25,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 13:50:25,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212560299] [2021-05-03 13:50:25,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:25,165 INFO L87 Difference]: Start difference. First operand 354 states and 995 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:25,362 INFO L93 Difference]: Finished difference Result 485 states and 1256 transitions. [2021-05-03 13:50:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:50:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:25,363 INFO L225 Difference]: With dead ends: 485 [2021-05-03 13:50:25,363 INFO L226 Difference]: Without dead ends: 483 [2021-05-03 13:50:25,364 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-05-03 13:50:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 352. [2021-05-03 13:50:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.8290598290598292) internal successors, (993), 351 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 993 transitions. [2021-05-03 13:50:25,369 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 993 transitions. Word has length 18 [2021-05-03 13:50:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,369 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 993 transitions. [2021-05-03 13:50:25,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 993 transitions. [2021-05-03 13:50:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:25,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,370 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 13:50:25,577 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash 21346315, now seen corresponding path program 70 times [2021-05-03 13:50:25,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320042598] [2021-05-03 13:50:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320042598] [2021-05-03 13:50:25,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867708576] [2021-05-03 13:50:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:25,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:25,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 13:50:25,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028006824] [2021-05-03 13:50:25,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:25,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:25,689 INFO L87 Difference]: Start difference. First operand 352 states and 993 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:25,883 INFO L93 Difference]: Finished difference Result 553 states and 1393 transitions. [2021-05-03 13:50:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:25,884 INFO L225 Difference]: With dead ends: 553 [2021-05-03 13:50:25,884 INFO L226 Difference]: Without dead ends: 553 [2021-05-03 13:50:25,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-03 13:50:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 355. [2021-05-03 13:50:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.824858757062147) internal successors, (1000), 354 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1000 transitions. [2021-05-03 13:50:25,891 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1000 transitions. Word has length 18 [2021-05-03 13:50:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,891 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1000 transitions. [2021-05-03 13:50:25,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1000 transitions. [2021-05-03 13:50:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:25,892 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,892 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:26,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:26,113 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:26,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:26,113 INFO L82 PathProgramCache]: Analyzing trace with hash 592801121, now seen corresponding path program 71 times [2021-05-03 13:50:26,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:26,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794251692] [2021-05-03 13:50:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:26,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794251692] [2021-05-03 13:50:26,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50613531] [2021-05-03 13:50:26,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:26,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:26,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-05-03 13:50:26,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18775119] [2021-05-03 13:50:26,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:26,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:26,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:26,236 INFO L87 Difference]: Start difference. First operand 355 states and 1000 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:26,509 INFO L93 Difference]: Finished difference Result 530 states and 1319 transitions. [2021-05-03 13:50:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:50:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:26,510 INFO L225 Difference]: With dead ends: 530 [2021-05-03 13:50:26,510 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 13:50:26,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=380, Invalid=742, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:50:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 13:50:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 341. [2021-05-03 13:50:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.8) internal successors, (952), 340 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 952 transitions. [2021-05-03 13:50:26,515 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 952 transitions. Word has length 18 [2021-05-03 13:50:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:26,515 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 952 transitions. [2021-05-03 13:50:26,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 952 transitions. [2021-05-03 13:50:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:26,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:26,516 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:26,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 13:50:26,717 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1128030923, now seen corresponding path program 72 times [2021-05-03 13:50:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:26,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387184840] [2021-05-03 13:50:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387184840] [2021-05-03 13:50:26,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780665201] [2021-05-03 13:50:26,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:26,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:26,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 13:50:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369333834] [2021-05-03 13:50:26,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:26,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:26,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:26,848 INFO L87 Difference]: Start difference. First operand 341 states and 952 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,127 INFO L93 Difference]: Finished difference Result 483 states and 1236 transitions. [2021-05-03 13:50:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:50:27,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,128 INFO L225 Difference]: With dead ends: 483 [2021-05-03 13:50:27,128 INFO L226 Difference]: Without dead ends: 471 [2021-05-03 13:50:27,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:50:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-05-03 13:50:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 348. [2021-05-03 13:50:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.809798270893372) internal successors, (975), 347 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 975 transitions. [2021-05-03 13:50:27,133 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 975 transitions. Word has length 18 [2021-05-03 13:50:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,133 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 975 transitions. [2021-05-03 13:50:27,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 975 transitions. [2021-05-03 13:50:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:27,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,134 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:27,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 13:50:27,345 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1656289961, now seen corresponding path program 73 times [2021-05-03 13:50:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:27,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666840745] [2021-05-03 13:50:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666840745] [2021-05-03 13:50:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166245330] [2021-05-03 13:50:27,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:27,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:27,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 13:50:27,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472478369] [2021-05-03 13:50:27,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:27,600 INFO L87 Difference]: Start difference. First operand 348 states and 975 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,967 INFO L93 Difference]: Finished difference Result 521 states and 1344 transitions. [2021-05-03 13:50:27,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:50:27,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,968 INFO L225 Difference]: With dead ends: 521 [2021-05-03 13:50:27,968 INFO L226 Difference]: Without dead ends: 521 [2021-05-03 13:50:27,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:50:27,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-03 13:50:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 368. [2021-05-03 13:50:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.8147138964577656) internal successors, (1033), 367 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1033 transitions. [2021-05-03 13:50:27,973 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1033 transitions. Word has length 18 [2021-05-03 13:50:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,973 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1033 transitions. [2021-05-03 13:50:27,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,973 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1033 transitions. [2021-05-03 13:50:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:27,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,974 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:28,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,174 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1268731953, now seen corresponding path program 74 times [2021-05-03 13:50:28,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:28,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322998188] [2021-05-03 13:50:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322998188] [2021-05-03 13:50:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101730036] [2021-05-03 13:50:28,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:28,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:28,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 13:50:28,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294461955] [2021-05-03 13:50:28,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:28,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:28,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:28,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:28,316 INFO L87 Difference]: Start difference. First operand 368 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:28,529 INFO L93 Difference]: Finished difference Result 613 states and 1567 transitions. [2021-05-03 13:50:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:50:28,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:28,530 INFO L225 Difference]: With dead ends: 613 [2021-05-03 13:50:28,530 INFO L226 Difference]: Without dead ends: 613 [2021-05-03 13:50:28,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=230, Invalid=472, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-03 13:50:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 413. [2021-05-03 13:50:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.8567961165048543) internal successors, (1177), 412 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1177 transitions. [2021-05-03 13:50:28,536 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1177 transitions. Word has length 18 [2021-05-03 13:50:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:28,536 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1177 transitions. [2021-05-03 13:50:28,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1177 transitions. [2021-05-03 13:50:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:28,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:28,537 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:28,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 13:50:28,738 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash -424946089, now seen corresponding path program 75 times [2021-05-03 13:50:28,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:28,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903238336] [2021-05-03 13:50:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903238336] [2021-05-03 13:50:28,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237001721] [2021-05-03 13:50:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:28,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-03 13:50:28,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671712123] [2021-05-03 13:50:28,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:28,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:28,894 INFO L87 Difference]: Start difference. First operand 413 states and 1177 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:29,145 INFO L93 Difference]: Finished difference Result 723 states and 1864 transitions. [2021-05-03 13:50:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:29,146 INFO L225 Difference]: With dead ends: 723 [2021-05-03 13:50:29,146 INFO L226 Difference]: Without dead ends: 723 [2021-05-03 13:50:29,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-05-03 13:50:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 473. [2021-05-03 13:50:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9110169491525424) internal successors, (1374), 472 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1374 transitions. [2021-05-03 13:50:29,154 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1374 transitions. Word has length 18 [2021-05-03 13:50:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:29,155 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 1374 transitions. [2021-05-03 13:50:29,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1374 transitions. [2021-05-03 13:50:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:29,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:29,156 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 13:50:29,376 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 146508717, now seen corresponding path program 76 times [2021-05-03 13:50:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69805944] [2021-05-03 13:50:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69805944] [2021-05-03 13:50:29,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598925116] [2021-05-03 13:50:29,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:29,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:29,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:29,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-05-03 13:50:29,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845337340] [2021-05-03 13:50:29,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:29,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:29,508 INFO L87 Difference]: Start difference. First operand 473 states and 1374 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:29,848 INFO L93 Difference]: Finished difference Result 693 states and 1787 transitions. [2021-05-03 13:50:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:50:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:29,856 INFO L225 Difference]: With dead ends: 693 [2021-05-03 13:50:29,856 INFO L226 Difference]: Without dead ends: 687 [2021-05-03 13:50:29,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:50:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-03 13:50:29,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 463. [2021-05-03 13:50:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.8896103896103895) internal successors, (1335), 462 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1335 transitions. [2021-05-03 13:50:29,862 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1335 transitions. Word has length 18 [2021-05-03 13:50:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 1335 transitions. [2021-05-03 13:50:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1335 transitions. [2021-05-03 13:50:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:29,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:29,863 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,065 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 681738519, now seen corresponding path program 77 times [2021-05-03 13:50:30,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134618550] [2021-05-03 13:50:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134618550] [2021-05-03 13:50:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202388844] [2021-05-03 13:50:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:30,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:30,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-05-03 13:50:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138051637] [2021-05-03 13:50:30,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:30,198 INFO L87 Difference]: Start difference. First operand 463 states and 1335 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:30,495 INFO L93 Difference]: Finished difference Result 706 states and 1819 transitions. [2021-05-03 13:50:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:50:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:30,496 INFO L225 Difference]: With dead ends: 706 [2021-05-03 13:50:30,496 INFO L226 Difference]: Without dead ends: 694 [2021-05-03 13:50:30,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:50:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-03 13:50:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 476. [2021-05-03 13:50:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.903157894736842) internal successors, (1379), 475 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1379 transitions. [2021-05-03 13:50:30,502 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1379 transitions. Word has length 18 [2021-05-03 13:50:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:30,502 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1379 transitions. [2021-05-03 13:50:30,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1379 transitions. [2021-05-03 13:50:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 13:50:30,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:30,503 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,705 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,705 INFO L82 PathProgramCache]: Analyzing trace with hash 93993197, now seen corresponding path program 78 times [2021-05-03 13:50:30,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481265399] [2021-05-03 13:50:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:30,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481265399] [2021-05-03 13:50:30,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790340843] [2021-05-03 13:50:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:30,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:30,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 13:50:30,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287459790] [2021-05-03 13:50:30,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:30,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:30,837 INFO L87 Difference]: Start difference. First operand 476 states and 1379 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,113 INFO L93 Difference]: Finished difference Result 674 states and 1783 transitions. [2021-05-03 13:50:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 13:50:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,114 INFO L225 Difference]: With dead ends: 674 [2021-05-03 13:50:31,114 INFO L226 Difference]: Without dead ends: 656 [2021-05-03 13:50:31,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:50:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-05-03 13:50:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 498. [2021-05-03 13:50:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.9014084507042255) internal successors, (1442), 497 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1442 transitions. [2021-05-03 13:50:31,121 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1442 transitions. Word has length 18 [2021-05-03 13:50:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,121 INFO L480 AbstractCegarLoop]: Abstraction has 498 states and 1442 transitions. [2021-05-03 13:50:31,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1442 transitions. [2021-05-03 13:50:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:31,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,122 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:31,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,322 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1452121605, now seen corresponding path program 79 times [2021-05-03 13:50:31,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:31,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905858940] [2021-05-03 13:50:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:31,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905858940] [2021-05-03 13:50:31,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414339258] [2021-05-03 13:50:31,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:31,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:31,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:31,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200593061] [2021-05-03 13:50:31,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:31,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:31,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:31,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:31,566 INFO L87 Difference]: Start difference. First operand 498 states and 1442 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,808 INFO L93 Difference]: Finished difference Result 678 states and 1761 transitions. [2021-05-03 13:50:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:50:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,809 INFO L225 Difference]: With dead ends: 678 [2021-05-03 13:50:31,809 INFO L226 Difference]: Without dead ends: 655 [2021-05-03 13:50:31,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:50:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-05-03 13:50:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 531. [2021-05-03 13:50:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.8679245283018866) internal successors, (1520), 530 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1520 transitions. [2021-05-03 13:50:31,816 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1520 transitions. Word has length 19 [2021-05-03 13:50:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,817 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1520 transitions. [2021-05-03 13:50:31,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1520 transitions. [2021-05-03 13:50:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:31,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,817 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:32,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,021 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1378493247, now seen corresponding path program 80 times [2021-05-03 13:50:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:32,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729670350] [2021-05-03 13:50:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729670350] [2021-05-03 13:50:32,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631929681] [2021-05-03 13:50:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:32,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:32,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:32,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:32,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:32,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833664929] [2021-05-03 13:50:32,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:32,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:32,284 INFO L87 Difference]: Start difference. First operand 531 states and 1520 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:32,472 INFO L93 Difference]: Finished difference Result 714 states and 1853 transitions. [2021-05-03 13:50:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:32,473 INFO L225 Difference]: With dead ends: 714 [2021-05-03 13:50:32,473 INFO L226 Difference]: Without dead ends: 707 [2021-05-03 13:50:32,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-05-03 13:50:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 555. [2021-05-03 13:50:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.895306859205776) internal successors, (1604), 554 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1604 transitions. [2021-05-03 13:50:32,482 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1604 transitions. Word has length 19 [2021-05-03 13:50:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:32,482 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1604 transitions. [2021-05-03 13:50:32,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1604 transitions. [2021-05-03 13:50:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:32,483 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:32,483 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:32,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 13:50:32,697 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1301771325, now seen corresponding path program 81 times [2021-05-03 13:50:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:32,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899857598] [2021-05-03 13:50:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899857598] [2021-05-03 13:50:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495579032] [2021-05-03 13:50:32,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:32,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:32,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:32,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-05-03 13:50:32,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751393820] [2021-05-03 13:50:32,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:32,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:32,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:32,983 INFO L87 Difference]: Start difference. First operand 555 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,226 INFO L93 Difference]: Finished difference Result 700 states and 1833 transitions. [2021-05-03 13:50:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,228 INFO L225 Difference]: With dead ends: 700 [2021-05-03 13:50:33,228 INFO L226 Difference]: Without dead ends: 684 [2021-05-03 13:50:33,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-05-03 13:50:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 542. [2021-05-03 13:50:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-05-03 13:50:33,242 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-05-03 13:50:33,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,242 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-05-03 13:50:33,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,242 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-05-03 13:50:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:33,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,243 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:33,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 13:50:33,465 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1949948053, now seen corresponding path program 82 times [2021-05-03 13:50:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:33,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149276042] [2021-05-03 13:50:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149276042] [2021-05-03 13:50:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811518954] [2021-05-03 13:50:33,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:33,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:33,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:33,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:33,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780985165] [2021-05-03 13:50:33,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:33,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:33,689 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,910 INFO L93 Difference]: Finished difference Result 698 states and 1814 transitions. [2021-05-03 13:50:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:33,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,912 INFO L225 Difference]: With dead ends: 698 [2021-05-03 13:50:33,912 INFO L226 Difference]: Without dead ends: 691 [2021-05-03 13:50:33,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-05-03 13:50:33,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 542. [2021-05-03 13:50:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-05-03 13:50:33,918 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-05-03 13:50:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,919 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-05-03 13:50:33,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-05-03 13:50:33,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:33,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,920 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,120 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1809789441, now seen corresponding path program 83 times [2021-05-03 13:50:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949330402] [2021-05-03 13:50:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:34,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949330402] [2021-05-03 13:50:34,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28171368] [2021-05-03 13:50:34,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:34,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:34,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382492149] [2021-05-03 13:50:34,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:34,339 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:34,582 INFO L93 Difference]: Finished difference Result 664 states and 1755 transitions. [2021-05-03 13:50:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:34,584 INFO L225 Difference]: With dead ends: 664 [2021-05-03 13:50:34,584 INFO L226 Difference]: Without dead ends: 657 [2021-05-03 13:50:34,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-05-03 13:50:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 542. [2021-05-03 13:50:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.8927911275415896) internal successors, (1565), 541 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1565 transitions. [2021-05-03 13:50:34,590 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1565 transitions. Word has length 19 [2021-05-03 13:50:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:34,590 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1565 transitions. [2021-05-03 13:50:34,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1565 transitions. [2021-05-03 13:50:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:34,591 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:34,591 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 13:50:34,796 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash -310264069, now seen corresponding path program 84 times [2021-05-03 13:50:34,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251479926] [2021-05-03 13:50:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:34,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251479926] [2021-05-03 13:50:34,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30520115] [2021-05-03 13:50:34,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:34,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:34,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:35,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208380706] [2021-05-03 13:50:35,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:35,023 INFO L87 Difference]: Start difference. First operand 542 states and 1565 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:35,186 INFO L93 Difference]: Finished difference Result 660 states and 1787 transitions. [2021-05-03 13:50:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:35,188 INFO L225 Difference]: With dead ends: 660 [2021-05-03 13:50:35,188 INFO L226 Difference]: Without dead ends: 653 [2021-05-03 13:50:35,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-05-03 13:50:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 555. [2021-05-03 13:50:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9097472924187726) internal successors, (1612), 554 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1612 transitions. [2021-05-03 13:50:35,194 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1612 transitions. Word has length 19 [2021-05-03 13:50:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:35,195 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1612 transitions. [2021-05-03 13:50:35,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1612 transitions. [2021-05-03 13:50:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:35,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:35,197 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:35,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 13:50:35,415 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1304438655, now seen corresponding path program 85 times [2021-05-03 13:50:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:35,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358468998] [2021-05-03 13:50:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358468998] [2021-05-03 13:50:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561435117] [2021-05-03 13:50:35,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:35,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246013197] [2021-05-03 13:50:35,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:35,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:35,739 INFO L87 Difference]: Start difference. First operand 555 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:35,890 INFO L93 Difference]: Finished difference Result 661 states and 1784 transitions. [2021-05-03 13:50:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:35,892 INFO L225 Difference]: With dead ends: 661 [2021-05-03 13:50:35,892 INFO L226 Difference]: Without dead ends: 652 [2021-05-03 13:50:35,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-05-03 13:50:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 555. [2021-05-03 13:50:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-05-03 13:50:35,901 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-05-03 13:50:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:35,901 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-05-03 13:50:35,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-05-03 13:50:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:35,902 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:35,902 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:36,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:36,124 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -774855173, now seen corresponding path program 86 times [2021-05-03 13:50:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:36,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319857051] [2021-05-03 13:50:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:36,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319857051] [2021-05-03 13:50:36,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370965717] [2021-05-03 13:50:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:36,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:36,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:36,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:36,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023617226] [2021-05-03 13:50:36,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:36,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:36,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:36,396 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:36,594 INFO L93 Difference]: Finished difference Result 635 states and 1737 transitions. [2021-05-03 13:50:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:36,596 INFO L225 Difference]: With dead ends: 635 [2021-05-03 13:50:36,596 INFO L226 Difference]: Without dead ends: 628 [2021-05-03 13:50:36,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-05-03 13:50:36,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 555. [2021-05-03 13:50:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.904332129963899) internal successors, (1609), 554 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1609 transitions. [2021-05-03 13:50:36,608 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1609 transitions. Word has length 19 [2021-05-03 13:50:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:36,608 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1609 transitions. [2021-05-03 13:50:36,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1609 transitions. [2021-05-03 13:50:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:36,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:36,611 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:36,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:36,830 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1122133313, now seen corresponding path program 87 times [2021-05-03 13:50:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:36,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579830101] [2021-05-03 13:50:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579830101] [2021-05-03 13:50:37,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919499239] [2021-05-03 13:50:37,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:37,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:37,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 13:50:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183581518] [2021-05-03 13:50:37,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:37,141 INFO L87 Difference]: Start difference. First operand 555 states and 1609 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:37,371 INFO L93 Difference]: Finished difference Result 776 states and 2043 transitions. [2021-05-03 13:50:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:37,373 INFO L225 Difference]: With dead ends: 776 [2021-05-03 13:50:37,373 INFO L226 Difference]: Without dead ends: 759 [2021-05-03 13:50:37,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-03 13:50:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 594. [2021-05-03 13:50:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.9409780775716694) internal successors, (1744), 593 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1744 transitions. [2021-05-03 13:50:37,380 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1744 transitions. Word has length 19 [2021-05-03 13:50:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:37,380 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1744 transitions. [2021-05-03 13:50:37,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1744 transitions. [2021-05-03 13:50:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:37,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:37,381 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:37,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 13:50:37,581 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:37,582 INFO L82 PathProgramCache]: Analyzing trace with hash 492569411, now seen corresponding path program 88 times [2021-05-03 13:50:37,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:37,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583950705] [2021-05-03 13:50:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583950705] [2021-05-03 13:50:37,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499423904] [2021-05-03 13:50:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:37,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 13:50:37,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862427181] [2021-05-03 13:50:37,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:37,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:37,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:37,841 INFO L87 Difference]: Start difference. First operand 594 states and 1744 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:38,042 INFO L93 Difference]: Finished difference Result 774 states and 2026 transitions. [2021-05-03 13:50:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:38,044 INFO L225 Difference]: With dead ends: 774 [2021-05-03 13:50:38,044 INFO L226 Difference]: Without dead ends: 756 [2021-05-03 13:50:38,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-05-03 13:50:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 583. [2021-05-03 13:50:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.922680412371134) internal successors, (1701), 582 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1701 transitions. [2021-05-03 13:50:38,053 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1701 transitions. Word has length 19 [2021-05-03 13:50:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:38,053 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1701 transitions. [2021-05-03 13:50:38,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1701 transitions. [2021-05-03 13:50:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:38,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:38,054 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:38,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 13:50:38,269 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1586724417, now seen corresponding path program 89 times [2021-05-03 13:50:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:38,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821167583] [2021-05-03 13:50:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821167583] [2021-05-03 13:50:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966354122] [2021-05-03 13:50:38,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:38,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:38,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:38,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:38,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:38,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870553236] [2021-05-03 13:50:38,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:38,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:38,495 INFO L87 Difference]: Start difference. First operand 583 states and 1701 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:38,748 INFO L93 Difference]: Finished difference Result 744 states and 1952 transitions. [2021-05-03 13:50:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:38,761 INFO L225 Difference]: With dead ends: 744 [2021-05-03 13:50:38,762 INFO L226 Difference]: Without dead ends: 722 [2021-05-03 13:50:38,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-03 13:50:38,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 580. [2021-05-03 13:50:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.9153713298791017) internal successors, (1688), 579 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1688 transitions. [2021-05-03 13:50:38,771 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1688 transitions. Word has length 19 [2021-05-03 13:50:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:38,771 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1688 transitions. [2021-05-03 13:50:38,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1688 transitions. [2021-05-03 13:50:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:38,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:38,772 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:38,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,989 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1620323645, now seen corresponding path program 90 times [2021-05-03 13:50:38,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:38,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631432326] [2021-05-03 13:50:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:39,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631432326] [2021-05-03 13:50:39,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016227474] [2021-05-03 13:50:39,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:39,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:39,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:39,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:39,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801906231] [2021-05-03 13:50:39,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:39,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:39,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:39,240 INFO L87 Difference]: Start difference. First operand 580 states and 1688 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:39,453 INFO L93 Difference]: Finished difference Result 695 states and 1864 transitions. [2021-05-03 13:50:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:39,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:39,454 INFO L225 Difference]: With dead ends: 695 [2021-05-03 13:50:39,454 INFO L226 Difference]: Without dead ends: 688 [2021-05-03 13:50:39,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-05-03 13:50:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 582. [2021-05-03 13:50:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.910499139414802) internal successors, (1691), 581 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1691 transitions. [2021-05-03 13:50:39,461 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1691 transitions. Word has length 19 [2021-05-03 13:50:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:39,461 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1691 transitions. [2021-05-03 13:50:39,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1691 transitions. [2021-05-03 13:50:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:39,462 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:39,462 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:39,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,662 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -592690923, now seen corresponding path program 91 times [2021-05-03 13:50:39,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:39,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602613902] [2021-05-03 13:50:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:39,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602613902] [2021-05-03 13:50:39,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860749702] [2021-05-03 13:50:39,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:39,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:39,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:39,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:39,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499462872] [2021-05-03 13:50:39,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:39,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:39,900 INFO L87 Difference]: Start difference. First operand 582 states and 1691 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:40,050 INFO L93 Difference]: Finished difference Result 647 states and 1795 transitions. [2021-05-03 13:50:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:50:40,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:40,051 INFO L225 Difference]: With dead ends: 647 [2021-05-03 13:50:40,051 INFO L226 Difference]: Without dead ends: 634 [2021-05-03 13:50:40,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:40,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-05-03 13:50:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 577. [2021-05-03 13:50:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.907986111111111) internal successors, (1675), 576 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1675 transitions. [2021-05-03 13:50:40,058 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1675 transitions. Word has length 19 [2021-05-03 13:50:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:40,058 INFO L480 AbstractCegarLoop]: Abstraction has 577 states and 1675 transitions. [2021-05-03 13:50:40,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1675 transitions. [2021-05-03 13:50:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:40,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:40,059 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:40,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 13:50:40,273 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:40,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:40,273 INFO L82 PathProgramCache]: Analyzing trace with hash -520276101, now seen corresponding path program 92 times [2021-05-03 13:50:40,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:40,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387231873] [2021-05-03 13:50:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387231873] [2021-05-03 13:50:40,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56471740] [2021-05-03 13:50:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:40,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:40,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:40,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084920944] [2021-05-03 13:50:40,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:40,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:40,497 INFO L87 Difference]: Start difference. First operand 577 states and 1675 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:40,747 INFO L93 Difference]: Finished difference Result 798 states and 2119 transitions. [2021-05-03 13:50:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:40,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:40,749 INFO L225 Difference]: With dead ends: 798 [2021-05-03 13:50:40,749 INFO L226 Difference]: Without dead ends: 781 [2021-05-03 13:50:40,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-05-03 13:50:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 632. [2021-05-03 13:50:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.9334389857369256) internal successors, (1851), 631 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1851 transitions. [2021-05-03 13:50:40,760 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1851 transitions. Word has length 19 [2021-05-03 13:50:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:40,760 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 1851 transitions. [2021-05-03 13:50:40,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1851 transitions. [2021-05-03 13:50:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:40,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:40,761 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:40,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:40,982 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1094426623, now seen corresponding path program 93 times [2021-05-03 13:50:40,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:40,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032449728] [2021-05-03 13:50:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032449728] [2021-05-03 13:50:41,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225462715] [2021-05-03 13:50:41,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:41,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:41,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:41,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:41,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324702381] [2021-05-03 13:50:41,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:41,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:41,224 INFO L87 Difference]: Start difference. First operand 632 states and 1851 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:41,432 INFO L93 Difference]: Finished difference Result 796 states and 2104 transitions. [2021-05-03 13:50:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:41,433 INFO L225 Difference]: With dead ends: 796 [2021-05-03 13:50:41,433 INFO L226 Difference]: Without dead ends: 780 [2021-05-03 13:50:41,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-05-03 13:50:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 621. [2021-05-03 13:50:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.92258064516129) internal successors, (1812), 620 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1812 transitions. [2021-05-03 13:50:41,440 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1812 transitions. Word has length 19 [2021-05-03 13:50:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:41,440 INFO L480 AbstractCegarLoop]: Abstraction has 621 states and 1812 transitions. [2021-05-03 13:50:41,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1812 transitions. [2021-05-03 13:50:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:41,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:41,441 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:41,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,659 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:41,659 INFO L82 PathProgramCache]: Analyzing trace with hash -984867205, now seen corresponding path program 94 times [2021-05-03 13:50:41,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:41,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097120085] [2021-05-03 13:50:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097120085] [2021-05-03 13:50:41,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277820705] [2021-05-03 13:50:41,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:41,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:41,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:41,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730224275] [2021-05-03 13:50:41,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:41,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:41,891 INFO L87 Difference]: Start difference. First operand 621 states and 1812 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:42,193 INFO L93 Difference]: Finished difference Result 809 states and 2103 transitions. [2021-05-03 13:50:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:42,195 INFO L225 Difference]: With dead ends: 809 [2021-05-03 13:50:42,195 INFO L226 Difference]: Without dead ends: 791 [2021-05-03 13:50:42,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-05-03 13:50:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 614. [2021-05-03 13:50:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2021-05-03 13:50:42,204 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 19 [2021-05-03 13:50:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:42,204 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2021-05-03 13:50:42,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2021-05-03 13:50:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:42,205 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:42,205 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:42,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 13:50:42,429 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:42,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1018466433, now seen corresponding path program 95 times [2021-05-03 13:50:42,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:42,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930133046] [2021-05-03 13:50:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930133046] [2021-05-03 13:50:42,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101420526] [2021-05-03 13:50:42,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:42,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:42,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:42,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:42,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:42,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205236443] [2021-05-03 13:50:42,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:42,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:42,694 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:43,019 INFO L93 Difference]: Finished difference Result 764 states and 2018 transitions. [2021-05-03 13:50:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:50:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:43,020 INFO L225 Difference]: With dead ends: 764 [2021-05-03 13:50:43,020 INFO L226 Difference]: Without dead ends: 744 [2021-05-03 13:50:43,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:50:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-05-03 13:50:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 607. [2021-05-03 13:50:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.9141914191419143) internal successors, (1766), 606 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1766 transitions. [2021-05-03 13:50:43,027 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1766 transitions. Word has length 19 [2021-05-03 13:50:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:43,027 INFO L480 AbstractCegarLoop]: Abstraction has 607 states and 1766 transitions. [2021-05-03 13:50:43,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1766 transitions. [2021-05-03 13:50:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:43,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:43,028 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:43,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:43,228 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2060042501, now seen corresponding path program 96 times [2021-05-03 13:50:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:43,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536600133] [2021-05-03 13:50:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536600133] [2021-05-03 13:50:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985344579] [2021-05-03 13:50:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:43,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:43,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:43,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-03 13:50:43,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473893776] [2021-05-03 13:50:43,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:43,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:43,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:43,491 INFO L87 Difference]: Start difference. First operand 607 states and 1766 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:43,750 INFO L93 Difference]: Finished difference Result 713 states and 1927 transitions. [2021-05-03 13:50:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:43,752 INFO L225 Difference]: With dead ends: 713 [2021-05-03 13:50:43,752 INFO L226 Difference]: Without dead ends: 706 [2021-05-03 13:50:43,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-05-03 13:50:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 615. [2021-05-03 13:50:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8957654723127035) internal successors, (1778), 614 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1778 transitions. [2021-05-03 13:50:43,759 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1778 transitions. Word has length 19 [2021-05-03 13:50:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:43,759 INFO L480 AbstractCegarLoop]: Abstraction has 615 states and 1778 transitions. [2021-05-03 13:50:43,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1778 transitions. [2021-05-03 13:50:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:43,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:43,759 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:43,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-03 13:50:43,960 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:43,960 INFO L82 PathProgramCache]: Analyzing trace with hash 323509763, now seen corresponding path program 97 times [2021-05-03 13:50:43,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:43,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510079890] [2021-05-03 13:50:43,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510079890] [2021-05-03 13:50:44,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213783632] [2021-05-03 13:50:44,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:44,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:44,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344642394] [2021-05-03 13:50:44,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:44,194 INFO L87 Difference]: Start difference. First operand 615 states and 1778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:44,349 INFO L93 Difference]: Finished difference Result 753 states and 2034 transitions. [2021-05-03 13:50:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:44,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:44,350 INFO L225 Difference]: With dead ends: 753 [2021-05-03 13:50:44,350 INFO L226 Difference]: Without dead ends: 743 [2021-05-03 13:50:44,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-05-03 13:50:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2021-05-03 13:50:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.905750798722045) internal successors, (1819), 626 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1819 transitions. [2021-05-03 13:50:44,357 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1819 transitions. Word has length 19 [2021-05-03 13:50:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:44,357 INFO L480 AbstractCegarLoop]: Abstraction has 627 states and 1819 transitions. [2021-05-03 13:50:44,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1819 transitions. [2021-05-03 13:50:44,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:44,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:44,358 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:44,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,558 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:44,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1938212487, now seen corresponding path program 98 times [2021-05-03 13:50:44,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:44,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930524306] [2021-05-03 13:50:44,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930524306] [2021-05-03 13:50:44,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362448237] [2021-05-03 13:50:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:44,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:44,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:44,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617980635] [2021-05-03 13:50:44,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:44,773 INFO L87 Difference]: Start difference. First operand 627 states and 1819 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:44,912 INFO L93 Difference]: Finished difference Result 735 states and 2000 transitions. [2021-05-03 13:50:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:44,914 INFO L225 Difference]: With dead ends: 735 [2021-05-03 13:50:44,914 INFO L226 Difference]: Without dead ends: 728 [2021-05-03 13:50:44,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-05-03 13:50:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 625. [2021-05-03 13:50:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.90224358974359) internal successors, (1811), 624 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1811 transitions. [2021-05-03 13:50:44,922 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1811 transitions. Word has length 19 [2021-05-03 13:50:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:44,922 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1811 transitions. [2021-05-03 13:50:44,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1811 transitions. [2021-05-03 13:50:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:44,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:44,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:45,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-03 13:50:45,145 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash 894964569, now seen corresponding path program 99 times [2021-05-03 13:50:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:45,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23884346] [2021-05-03 13:50:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23884346] [2021-05-03 13:50:45,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557404327] [2021-05-03 13:50:45,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:45,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:50:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:45,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 13:50:45,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702679143] [2021-05-03 13:50:45,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:45,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:45,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:45,353 INFO L87 Difference]: Start difference. First operand 625 states and 1811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:45,493 INFO L93 Difference]: Finished difference Result 709 states and 1948 transitions. [2021-05-03 13:50:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:45,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:45,494 INFO L225 Difference]: With dead ends: 709 [2021-05-03 13:50:45,494 INFO L226 Difference]: Without dead ends: 702 [2021-05-03 13:50:45,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-03 13:50:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 624. [2021-05-03 13:50:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.9020866773675764) internal successors, (1808), 623 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1808 transitions. [2021-05-03 13:50:45,501 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1808 transitions. Word has length 19 [2021-05-03 13:50:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:45,501 INFO L480 AbstractCegarLoop]: Abstraction has 624 states and 1808 transitions. [2021-05-03 13:50:45,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1808 transitions. [2021-05-03 13:50:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:45,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:45,502 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:45,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:45,702 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:45,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:45,703 INFO L82 PathProgramCache]: Analyzing trace with hash 711067771, now seen corresponding path program 100 times [2021-05-03 13:50:45,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:45,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815240887] [2021-05-03 13:50:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815240887] [2021-05-03 13:50:45,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608129300] [2021-05-03 13:50:45,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:45,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:45,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:45,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:45,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:45,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189365750] [2021-05-03 13:50:45,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:45,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:45,924 INFO L87 Difference]: Start difference. First operand 624 states and 1808 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:46,100 INFO L93 Difference]: Finished difference Result 809 states and 2160 transitions. [2021-05-03 13:50:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:46,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:46,101 INFO L225 Difference]: With dead ends: 809 [2021-05-03 13:50:46,101 INFO L226 Difference]: Without dead ends: 799 [2021-05-03 13:50:46,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:46,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-05-03 13:50:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 644. [2021-05-03 13:50:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.9175738724727838) internal successors, (1876), 643 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1876 transitions. [2021-05-03 13:50:46,109 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1876 transitions. Word has length 19 [2021-05-03 13:50:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:46,109 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1876 transitions. [2021-05-03 13:50:46,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1876 transitions. [2021-05-03 13:50:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:46,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:46,109 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:46,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,310 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1969196801, now seen corresponding path program 101 times [2021-05-03 13:50:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:46,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281176481] [2021-05-03 13:50:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:46,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281176481] [2021-05-03 13:50:46,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17851785] [2021-05-03 13:50:46,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:46,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:46,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:46,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:46,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:46,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:46,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:46,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294169400] [2021-05-03 13:50:46,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:46,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:46,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:46,538 INFO L87 Difference]: Start difference. First operand 644 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:46,734 INFO L93 Difference]: Finished difference Result 793 states and 2130 transitions. [2021-05-03 13:50:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:46,735 INFO L225 Difference]: With dead ends: 793 [2021-05-03 13:50:46,735 INFO L226 Difference]: Without dead ends: 786 [2021-05-03 13:50:46,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-05-03 13:50:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 640. [2021-05-03 13:50:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.9139280125195617) internal successors, (1862), 639 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1862 transitions. [2021-05-03 13:50:46,742 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1862 transitions. Word has length 19 [2021-05-03 13:50:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:46,742 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 1862 transitions. [2021-05-03 13:50:46,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1862 transitions. [2021-05-03 13:50:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:46,743 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:46,743 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:46,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-05-03 13:50:46,943 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1282522577, now seen corresponding path program 102 times [2021-05-03 13:50:46,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:46,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423850765] [2021-05-03 13:50:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:47,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423850765] [2021-05-03 13:50:47,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179166120] [2021-05-03 13:50:47,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:47,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:47,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:47,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:47,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:47,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230023149] [2021-05-03 13:50:47,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:47,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:47,135 INFO L87 Difference]: Start difference. First operand 640 states and 1862 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:47,321 INFO L93 Difference]: Finished difference Result 788 states and 2114 transitions. [2021-05-03 13:50:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:47,323 INFO L225 Difference]: With dead ends: 788 [2021-05-03 13:50:47,323 INFO L226 Difference]: Without dead ends: 775 [2021-05-03 13:50:47,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-05-03 13:50:47,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 638. [2021-05-03 13:50:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.9089481946624804) internal successors, (1853), 637 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1853 transitions. [2021-05-03 13:50:47,333 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1853 transitions. Word has length 19 [2021-05-03 13:50:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:47,333 INFO L480 AbstractCegarLoop]: Abstraction has 638 states and 1853 transitions. [2021-05-03 13:50:47,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,333 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1853 transitions. [2021-05-03 13:50:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:50:47,334 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:47,334 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:47,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 13:50:47,549 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1817752379, now seen corresponding path program 103 times [2021-05-03 13:50:47,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:47,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561151404] [2021-05-03 13:50:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561151404] [2021-05-03 13:50:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425525548] [2021-05-03 13:50:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 13:50:47,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:47,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:47,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 13:50:47,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347461158] [2021-05-03 13:50:47,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:47,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:47,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:47,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:47,767 INFO L87 Difference]: Start difference. First operand 638 states and 1853 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:47,970 INFO L93 Difference]: Finished difference Result 748 states and 2031 transitions. [2021-05-03 13:50:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:47,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:50:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:47,971 INFO L225 Difference]: With dead ends: 748 [2021-05-03 13:50:47,971 INFO L226 Difference]: Without dead ends: 741 [2021-05-03 13:50:47,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-03 13:50:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 636. [2021-05-03 13:50:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.9086614173228345) internal successors, (1847), 635 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1847 transitions. [2021-05-03 13:50:47,977 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1847 transitions. Word has length 19 [2021-05-03 13:50:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:47,978 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1847 transitions. [2021-05-03 13:50:47,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1847 transitions. [2021-05-03 13:50:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:47,978 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:47,978 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:48,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,179 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2039469541, now seen corresponding path program 104 times [2021-05-03 13:50:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:48,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234820318] [2021-05-03 13:50:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234820318] [2021-05-03 13:50:48,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827476843] [2021-05-03 13:50:48,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:48,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 13:50:48,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953879476] [2021-05-03 13:50:48,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:48,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:48,319 INFO L87 Difference]: Start difference. First operand 636 states and 1847 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:48,439 INFO L93 Difference]: Finished difference Result 972 states and 2745 transitions. [2021-05-03 13:50:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:50:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:48,441 INFO L225 Difference]: With dead ends: 972 [2021-05-03 13:50:48,441 INFO L226 Difference]: Without dead ends: 955 [2021-05-03 13:50:48,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-03 13:50:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 631. [2021-05-03 13:50:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 2.9158730158730157) internal successors, (1837), 630 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1837 transitions. [2021-05-03 13:50:48,452 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1837 transitions. Word has length 20 [2021-05-03 13:50:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:48,452 INFO L480 AbstractCegarLoop]: Abstraction has 631 states and 1837 transitions. [2021-05-03 13:50:48,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1837 transitions. [2021-05-03 13:50:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:48,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:48,453 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:48,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,669 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1555544053, now seen corresponding path program 105 times [2021-05-03 13:50:48,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:48,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558129233] [2021-05-03 13:50:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558129233] [2021-05-03 13:50:48,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838374627] [2021-05-03 13:50:48,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:48,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 13:50:48,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140344383] [2021-05-03 13:50:48,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:50:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:50:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:48,833 INFO L87 Difference]: Start difference. First operand 631 states and 1837 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:48,991 INFO L93 Difference]: Finished difference Result 996 states and 2821 transitions. [2021-05-03 13:50:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:48,993 INFO L225 Difference]: With dead ends: 996 [2021-05-03 13:50:48,993 INFO L226 Difference]: Without dead ends: 996 [2021-05-03 13:50:48,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:50:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-05-03 13:50:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 650. [2021-05-03 13:50:49,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.9183359013867487) internal successors, (1894), 649 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1894 transitions. [2021-05-03 13:50:49,005 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1894 transitions. Word has length 20 [2021-05-03 13:50:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:49,005 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 1894 transitions. [2021-05-03 13:50:49,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1894 transitions. [2021-05-03 13:50:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:49,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:49,007 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:49,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,229 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash 946430223, now seen corresponding path program 106 times [2021-05-03 13:50:49,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:49,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237191067] [2021-05-03 13:50:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237191067] [2021-05-03 13:50:49,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856804340] [2021-05-03 13:50:49,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:49,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:49,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:49,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:49,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:49,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:49,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:49,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862691881] [2021-05-03 13:50:49,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:49,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:49,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:49,419 INFO L87 Difference]: Start difference. First operand 650 states and 1894 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:49,762 INFO L93 Difference]: Finished difference Result 1332 states and 3575 transitions. [2021-05-03 13:50:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:50:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:49,763 INFO L225 Difference]: With dead ends: 1332 [2021-05-03 13:50:49,763 INFO L226 Difference]: Without dead ends: 1326 [2021-05-03 13:50:49,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:50:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-05-03 13:50:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 787. [2021-05-03 13:50:49,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.0063613231552164) internal successors, (2363), 786 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2363 transitions. [2021-05-03 13:50:49,774 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2363 transitions. Word has length 20 [2021-05-03 13:50:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:49,774 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 2363 transitions. [2021-05-03 13:50:49,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2363 transitions. [2021-05-03 13:50:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:49,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:49,775 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:49,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-05-03 13:50:49,975 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1517885029, now seen corresponding path program 107 times [2021-05-03 13:50:49,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:49,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005515650] [2021-05-03 13:50:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005515650] [2021-05-03 13:50:50,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377575329] [2021-05-03 13:50:50,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:50,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:50,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:50,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238516047] [2021-05-03 13:50:50,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:50,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:50,140 INFO L87 Difference]: Start difference. First operand 787 states and 2363 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:50,561 INFO L93 Difference]: Finished difference Result 1321 states and 3538 transitions. [2021-05-03 13:50:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:50:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:50,562 INFO L225 Difference]: With dead ends: 1321 [2021-05-03 13:50:50,562 INFO L226 Difference]: Without dead ends: 1315 [2021-05-03 13:50:50,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:50:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-05-03 13:50:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 729. [2021-05-03 13:50:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 2.9464285714285716) internal successors, (2145), 728 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2145 transitions. [2021-05-03 13:50:50,572 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2145 transitions. Word has length 20 [2021-05-03 13:50:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:50,572 INFO L480 AbstractCegarLoop]: Abstraction has 729 states and 2145 transitions. [2021-05-03 13:50:50,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2145 transitions. [2021-05-03 13:50:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:50,573 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:50,573 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:50,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-03 13:50:50,773 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash -413686517, now seen corresponding path program 108 times [2021-05-03 13:50:50,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:50,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749056099] [2021-05-03 13:50:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749056099] [2021-05-03 13:50:50,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501511163] [2021-05-03 13:50:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:50,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623442464] [2021-05-03 13:50:50,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:50,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:50,935 INFO L87 Difference]: Start difference. First operand 729 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:51,335 INFO L93 Difference]: Finished difference Result 1177 states and 3102 transitions. [2021-05-03 13:50:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:50:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:51,337 INFO L225 Difference]: With dead ends: 1177 [2021-05-03 13:50:51,337 INFO L226 Difference]: Without dead ends: 1177 [2021-05-03 13:50:51,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:50:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-03 13:50:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 767. [2021-05-03 13:50:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.971279373368146) internal successors, (2276), 766 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2276 transitions. [2021-05-03 13:50:51,348 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2276 transitions. Word has length 20 [2021-05-03 13:50:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:51,348 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2276 transitions. [2021-05-03 13:50:51,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2276 transitions. [2021-05-03 13:50:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:51,349 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:51,349 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:51,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-03 13:50:51,549 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash -878277621, now seen corresponding path program 109 times [2021-05-03 13:50:51,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:51,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611619398] [2021-05-03 13:50:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:51,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611619398] [2021-05-03 13:50:51,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794855770] [2021-05-03 13:50:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:51,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:51,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:51,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:51,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86001468] [2021-05-03 13:50:51,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:51,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:51,725 INFO L87 Difference]: Start difference. First operand 767 states and 2276 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:52,170 INFO L93 Difference]: Finished difference Result 1009 states and 2756 transitions. [2021-05-03 13:50:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:50:52,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:52,172 INFO L225 Difference]: With dead ends: 1009 [2021-05-03 13:50:52,172 INFO L226 Difference]: Without dead ends: 1005 [2021-05-03 13:50:52,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:50:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-05-03 13:50:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 699. [2021-05-03 13:50:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.9283667621776504) internal successors, (2044), 698 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2044 transitions. [2021-05-03 13:50:52,184 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2044 transitions. Word has length 20 [2021-05-03 13:50:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:52,184 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 2044 transitions. [2021-05-03 13:50:52,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2044 transitions. [2021-05-03 13:50:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:52,185 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:52,185 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:52,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 13:50:52,386 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2053114831, now seen corresponding path program 110 times [2021-05-03 13:50:52,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:52,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178214869] [2021-05-03 13:50:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:52,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178214869] [2021-05-03 13:50:52,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928032919] [2021-05-03 13:50:52,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:52,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:52,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:52,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:52,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:52,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909372682] [2021-05-03 13:50:52,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:52,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:52,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:52,538 INFO L87 Difference]: Start difference. First operand 699 states and 2044 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:52,923 INFO L93 Difference]: Finished difference Result 1249 states and 3308 transitions. [2021-05-03 13:50:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:50:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:52,925 INFO L225 Difference]: With dead ends: 1249 [2021-05-03 13:50:52,925 INFO L226 Difference]: Without dead ends: 1240 [2021-05-03 13:50:52,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:50:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-05-03 13:50:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 724. [2021-05-03 13:50:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.936376210235131) internal successors, (2123), 723 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2123 transitions. [2021-05-03 13:50:52,934 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2123 transitions. Word has length 20 [2021-05-03 13:50:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:52,934 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 2123 transitions. [2021-05-03 13:50:52,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2123 transitions. [2021-05-03 13:50:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:52,935 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:52,935 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:53,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 13:50:53,135 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1465369509, now seen corresponding path program 111 times [2021-05-03 13:50:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:53,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353956175] [2021-05-03 13:50:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353956175] [2021-05-03 13:50:53,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108725568] [2021-05-03 13:50:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:53,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:53,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821122223] [2021-05-03 13:50:53,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:53,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:53,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:53,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:53,310 INFO L87 Difference]: Start difference. First operand 724 states and 2123 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:53,663 INFO L93 Difference]: Finished difference Result 1262 states and 3371 transitions. [2021-05-03 13:50:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:50:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:53,665 INFO L225 Difference]: With dead ends: 1262 [2021-05-03 13:50:53,665 INFO L226 Difference]: Without dead ends: 1250 [2021-05-03 13:50:53,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 13:50:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-05-03 13:50:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 734. [2021-05-03 13:50:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.9263301500682126) internal successors, (2145), 733 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2145 transitions. [2021-05-03 13:50:53,675 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2145 transitions. Word has length 20 [2021-05-03 13:50:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:53,675 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2145 transitions. [2021-05-03 13:50:53,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2145 transitions. [2021-05-03 13:50:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:53,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:53,676 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:53,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,876 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 425133711, now seen corresponding path program 112 times [2021-05-03 13:50:53,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:53,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696558553] [2021-05-03 13:50:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696558553] [2021-05-03 13:50:53,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632749029] [2021-05-03 13:50:53,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:53,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:54,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:50:54,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690028273] [2021-05-03 13:50:54,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:54,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:54,031 INFO L87 Difference]: Start difference. First operand 734 states and 2145 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:54,286 INFO L93 Difference]: Finished difference Result 1109 states and 3026 transitions. [2021-05-03 13:50:54,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:54,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:54,288 INFO L225 Difference]: With dead ends: 1109 [2021-05-03 13:50:54,288 INFO L226 Difference]: Without dead ends: 1097 [2021-05-03 13:50:54,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:50:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-05-03 13:50:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 734. [2021-05-03 13:50:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.922237380627558) internal successors, (2142), 733 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2142 transitions. [2021-05-03 13:50:54,297 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2142 transitions. Word has length 20 [2021-05-03 13:50:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:54,297 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2142 transitions. [2021-05-03 13:50:54,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2142 transitions. [2021-05-03 13:50:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:54,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:54,298 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:54,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-03 13:50:54,498 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1225555761, now seen corresponding path program 113 times [2021-05-03 13:50:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:54,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187497426] [2021-05-03 13:50:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187497426] [2021-05-03 13:50:54,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271376200] [2021-05-03 13:50:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:54,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:54,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:50:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613027877] [2021-05-03 13:50:54,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:54,647 INFO L87 Difference]: Start difference. First operand 734 states and 2142 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:55,035 INFO L93 Difference]: Finished difference Result 1207 states and 3153 transitions. [2021-05-03 13:50:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:50:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:55,037 INFO L225 Difference]: With dead ends: 1207 [2021-05-03 13:50:55,037 INFO L226 Difference]: Without dead ends: 1201 [2021-05-03 13:50:55,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:50:55,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-05-03 13:50:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 788. [2021-05-03 13:50:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.9479034307496823) internal successors, (2320), 787 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2320 transitions. [2021-05-03 13:50:55,047 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2320 transitions. Word has length 20 [2021-05-03 13:50:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:55,047 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 2320 transitions. [2021-05-03 13:50:55,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2320 transitions. [2021-05-03 13:50:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:55,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:55,048 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:55,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,250 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:55,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:55,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1690146865, now seen corresponding path program 114 times [2021-05-03 13:50:55,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:55,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265536136] [2021-05-03 13:50:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:55,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265536136] [2021-05-03 13:50:55,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852315133] [2021-05-03 13:50:55,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:55,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:55,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:55,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:55,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:55,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:50:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890378995] [2021-05-03 13:50:55,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:55,401 INFO L87 Difference]: Start difference. First operand 788 states and 2320 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:55,889 INFO L93 Difference]: Finished difference Result 1081 states and 2841 transitions. [2021-05-03 13:50:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:50:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:55,891 INFO L225 Difference]: With dead ends: 1081 [2021-05-03 13:50:55,891 INFO L226 Difference]: Without dead ends: 1075 [2021-05-03 13:50:55,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:50:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-05-03 13:50:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 726. [2021-05-03 13:50:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.9117241379310346) internal successors, (2111), 725 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2111 transitions. [2021-05-03 13:50:55,900 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2111 transitions. Word has length 20 [2021-05-03 13:50:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:55,900 INFO L480 AbstractCegarLoop]: Abstraction has 726 states and 2111 transitions. [2021-05-03 13:50:55,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2111 transitions. [2021-05-03 13:50:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:55,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:55,901 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:56,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 13:50:56,104 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:56,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1723746093, now seen corresponding path program 115 times [2021-05-03 13:50:56,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:56,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705330638] [2021-05-03 13:50:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705330638] [2021-05-03 13:50:56,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303897597] [2021-05-03 13:50:56,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:56,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 13:50:56,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952703218] [2021-05-03 13:50:56,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:50:56,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:56,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:50:56,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:56,266 INFO L87 Difference]: Start difference. First operand 726 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:56,704 INFO L93 Difference]: Finished difference Result 974 states and 2590 transitions. [2021-05-03 13:50:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:50:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:56,705 INFO L225 Difference]: With dead ends: 974 [2021-05-03 13:50:56,706 INFO L226 Difference]: Without dead ends: 966 [2021-05-03 13:50:56,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:50:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-05-03 13:50:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 737. [2021-05-03 13:50:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.917119565217391) internal successors, (2147), 736 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2147 transitions. [2021-05-03 13:50:56,714 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2147 transitions. Word has length 20 [2021-05-03 13:50:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:56,714 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2147 transitions. [2021-05-03 13:50:56,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2147 transitions. [2021-05-03 13:50:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:56,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:56,715 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:56,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-05-03 13:50:56,929 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash -623698549, now seen corresponding path program 116 times [2021-05-03 13:50:56,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:56,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899973343] [2021-05-03 13:50:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899973343] [2021-05-03 13:50:56,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44615467] [2021-05-03 13:50:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:57,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-05-03 13:50:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871352345] [2021-05-03 13:50:57,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:57,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:57,116 INFO L87 Difference]: Start difference. First operand 737 states and 2147 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:57,484 INFO L93 Difference]: Finished difference Result 1269 states and 3314 transitions. [2021-05-03 13:50:57,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:50:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:57,486 INFO L225 Difference]: With dead ends: 1269 [2021-05-03 13:50:57,486 INFO L226 Difference]: Without dead ends: 1260 [2021-05-03 13:50:57,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:50:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-05-03 13:50:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 824. [2021-05-03 13:50:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.9404617253948966) internal successors, (2420), 823 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2420 transitions. [2021-05-03 13:50:57,496 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2420 transitions. Word has length 20 [2021-05-03 13:50:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:57,497 INFO L480 AbstractCegarLoop]: Abstraction has 824 states and 2420 transitions. [2021-05-03 13:50:57,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2420 transitions. [2021-05-03 13:50:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:57,498 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:57,498 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:57,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,698 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1088289653, now seen corresponding path program 117 times [2021-05-03 13:50:57,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:57,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011262342] [2021-05-03 13:50:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011262342] [2021-05-03 13:50:57,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913406331] [2021-05-03 13:50:57,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:57,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:57,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:57,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-05-03 13:50:57,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394828819] [2021-05-03 13:50:57,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:50:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:50:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:57,868 INFO L87 Difference]: Start difference. First operand 824 states and 2420 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:58,383 INFO L93 Difference]: Finished difference Result 1150 states and 3032 transitions. [2021-05-03 13:50:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:50:58,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:58,385 INFO L225 Difference]: With dead ends: 1150 [2021-05-03 13:50:58,385 INFO L226 Difference]: Without dead ends: 1144 [2021-05-03 13:50:58,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:50:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-05-03 13:50:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 795. [2021-05-03 13:50:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.9168765743073046) internal successors, (2316), 794 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2316 transitions. [2021-05-03 13:50:58,394 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2316 transitions. Word has length 20 [2021-05-03 13:50:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:58,394 INFO L480 AbstractCegarLoop]: Abstraction has 795 states and 2316 transitions. [2021-05-03 13:50:58,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2316 transitions. [2021-05-03 13:50:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:58,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:58,395 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:58,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:58,596 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1121888881, now seen corresponding path program 118 times [2021-05-03 13:50:58,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:58,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855613037] [2021-05-03 13:50:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:58,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855613037] [2021-05-03 13:50:58,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28152149] [2021-05-03 13:50:58,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:58,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:58,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:58,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 13:50:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034044215] [2021-05-03 13:50:58,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:50:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:50:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:58,761 INFO L87 Difference]: Start difference. First operand 795 states and 2316 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:59,233 INFO L93 Difference]: Finished difference Result 1155 states and 3056 transitions. [2021-05-03 13:50:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:50:59,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:50:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:59,234 INFO L225 Difference]: With dead ends: 1155 [2021-05-03 13:50:59,234 INFO L226 Difference]: Without dead ends: 1147 [2021-05-03 13:50:59,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:50:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-05-03 13:50:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 789. [2021-05-03 13:50:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.9289340101522843) internal successors, (2308), 788 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2308 transitions. [2021-05-03 13:50:59,243 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2308 transitions. Word has length 20 [2021-05-03 13:50:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:59,243 INFO L480 AbstractCegarLoop]: Abstraction has 789 states and 2308 transitions. [2021-05-03 13:50:59,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2308 transitions. [2021-05-03 13:50:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:50:59,244 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:59,244 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:59,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-03 13:50:59,445 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2131502347, now seen corresponding path program 119 times [2021-05-03 13:50:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:59,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054907112] [2021-05-03 13:50:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:59,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054907112] [2021-05-03 13:50:59,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65644076] [2021-05-03 13:50:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:59,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:59,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:59,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:50:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:59,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:59,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 13:50:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134826556] [2021-05-03 13:50:59,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:59,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:59,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:59,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:59,624 INFO L87 Difference]: Start difference. First operand 789 states and 2308 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:00,079 INFO L93 Difference]: Finished difference Result 1081 states and 2905 transitions. [2021-05-03 13:51:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 13:51:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:00,080 INFO L225 Difference]: With dead ends: 1081 [2021-05-03 13:51:00,081 INFO L226 Difference]: Without dead ends: 1069 [2021-05-03 13:51:00,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:51:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-05-03 13:51:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 809. [2021-05-03 13:51:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 2.9294554455445545) internal successors, (2367), 808 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2367 transitions. [2021-05-03 13:51:00,090 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2367 transitions. Word has length 20 [2021-05-03 13:51:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:00,090 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2367 transitions. [2021-05-03 13:51:00,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2367 transitions. [2021-05-03 13:51:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:00,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:00,091 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:00,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,291 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash 854005839, now seen corresponding path program 120 times [2021-05-03 13:51:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:00,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695520484] [2021-05-03 13:51:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:00,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695520484] [2021-05-03 13:51:00,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52864539] [2021-05-03 13:51:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:00,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:00,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:00,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:00,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-05-03 13:51:00,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583946134] [2021-05-03 13:51:00,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:00,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:00,444 INFO L87 Difference]: Start difference. First operand 809 states and 2367 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:00,817 INFO L93 Difference]: Finished difference Result 1520 states and 4046 transitions. [2021-05-03 13:51:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:51:00,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:00,819 INFO L225 Difference]: With dead ends: 1520 [2021-05-03 13:51:00,819 INFO L226 Difference]: Without dead ends: 1514 [2021-05-03 13:51:00,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:51:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-05-03 13:51:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 989. [2021-05-03 13:51:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.9898785425101213) internal successors, (2954), 988 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2954 transitions. [2021-05-03 13:51:00,830 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2954 transitions. Word has length 20 [2021-05-03 13:51:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:00,831 INFO L480 AbstractCegarLoop]: Abstraction has 989 states and 2954 transitions. [2021-05-03 13:51:00,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2954 transitions. [2021-05-03 13:51:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:00,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:00,832 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:01,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-03 13:51:01,032 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:01,032 INFO L82 PathProgramCache]: Analyzing trace with hash 389414735, now seen corresponding path program 121 times [2021-05-03 13:51:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:01,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929108031] [2021-05-03 13:51:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929108031] [2021-05-03 13:51:01,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697545180] [2021-05-03 13:51:01,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:01,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:01,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-05-03 13:51:01,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49850921] [2021-05-03 13:51:01,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:01,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:01,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:01,186 INFO L87 Difference]: Start difference. First operand 989 states and 2954 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:01,776 INFO L93 Difference]: Finished difference Result 1383 states and 3716 transitions. [2021-05-03 13:51:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:51:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:01,778 INFO L225 Difference]: With dead ends: 1383 [2021-05-03 13:51:01,778 INFO L226 Difference]: Without dead ends: 1379 [2021-05-03 13:51:01,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 13:51:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-05-03 13:51:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 956. [2021-05-03 13:51:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.966492146596859) internal successors, (2833), 955 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2833 transitions. [2021-05-03 13:51:01,790 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2833 transitions. Word has length 20 [2021-05-03 13:51:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:01,790 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 2833 transitions. [2021-05-03 13:51:01,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2833 transitions. [2021-05-03 13:51:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:01,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:01,791 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:01,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-03 13:51:01,991 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash 355815507, now seen corresponding path program 122 times [2021-05-03 13:51:01,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:01,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496705507] [2021-05-03 13:51:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:02,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496705507] [2021-05-03 13:51:02,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93626753] [2021-05-03 13:51:02,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:02,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:02,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:02,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-05-03 13:51:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688654671] [2021-05-03 13:51:02,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:02,175 INFO L87 Difference]: Start difference. First operand 956 states and 2833 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:02,688 INFO L93 Difference]: Finished difference Result 1412 states and 3831 transitions. [2021-05-03 13:51:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:51:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:02,690 INFO L225 Difference]: With dead ends: 1412 [2021-05-03 13:51:02,690 INFO L226 Difference]: Without dead ends: 1404 [2021-05-03 13:51:02,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:51:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-05-03 13:51:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1024. [2021-05-03 13:51:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9980449657869013) internal successors, (3067), 1023 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3067 transitions. [2021-05-03 13:51:02,702 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3067 transitions. Word has length 20 [2021-05-03 13:51:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:02,702 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 3067 transitions. [2021-05-03 13:51:02,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3067 transitions. [2021-05-03 13:51:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:02,703 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:02,703 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:02,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 13:51:02,904 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash -685760561, now seen corresponding path program 123 times [2021-05-03 13:51:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:02,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945768366] [2021-05-03 13:51:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:02,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945768366] [2021-05-03 13:51:02,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875261765] [2021-05-03 13:51:02,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:02,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:02,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:03,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:03,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 13:51:03,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616164103] [2021-05-03 13:51:03,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:03,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:03,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:03,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:03,070 INFO L87 Difference]: Start difference. First operand 1024 states and 3067 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:03,573 INFO L93 Difference]: Finished difference Result 1501 states and 4138 transitions. [2021-05-03 13:51:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:51:03,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:03,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:03,575 INFO L225 Difference]: With dead ends: 1501 [2021-05-03 13:51:03,575 INFO L226 Difference]: Without dead ends: 1489 [2021-05-03 13:51:03,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:51:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-05-03 13:51:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1112. [2021-05-03 13:51:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.027902790279028) internal successors, (3364), 1111 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3364 transitions. [2021-05-03 13:51:03,588 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3364 transitions. Word has length 20 [2021-05-03 13:51:03,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:03,588 INFO L480 AbstractCegarLoop]: Abstraction has 1112 states and 3364 transitions. [2021-05-03 13:51:03,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3364 transitions. [2021-05-03 13:51:03,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:03,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:03,589 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:03,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,790 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1385119699, now seen corresponding path program 124 times [2021-05-03 13:51:03,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:03,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012206261] [2021-05-03 13:51:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012206261] [2021-05-03 13:51:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550525089] [2021-05-03 13:51:03,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:03,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:03,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 13:51:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495500573] [2021-05-03 13:51:03,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:51:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:03,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:51:03,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:03,970 INFO L87 Difference]: Start difference. First operand 1112 states and 3364 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:04,440 INFO L93 Difference]: Finished difference Result 1470 states and 4125 transitions. [2021-05-03 13:51:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:51:04,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:04,442 INFO L225 Difference]: With dead ends: 1470 [2021-05-03 13:51:04,442 INFO L226 Difference]: Without dead ends: 1454 [2021-05-03 13:51:04,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:51:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-05-03 13:51:04,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1142. [2021-05-03 13:51:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.028045574057844) internal successors, (3455), 1141 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3455 transitions. [2021-05-03 13:51:04,455 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3455 transitions. Word has length 20 [2021-05-03 13:51:04,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:04,455 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3455 transitions. [2021-05-03 13:51:04,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3455 transitions. [2021-05-03 13:51:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:04,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:04,457 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:04,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-05-03 13:51:04,657 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:04,658 INFO L82 PathProgramCache]: Analyzing trace with hash 693043539, now seen corresponding path program 125 times [2021-05-03 13:51:04,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:04,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799864123] [2021-05-03 13:51:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:04,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799864123] [2021-05-03 13:51:04,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133455860] [2021-05-03 13:51:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:51:04,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:04,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:04,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 13:51:04,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292240777] [2021-05-03 13:51:04,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:51:04,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:51:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:51:04,830 INFO L87 Difference]: Start difference. First operand 1142 states and 3455 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:04,929 INFO L93 Difference]: Finished difference Result 1462 states and 4279 transitions. [2021-05-03 13:51:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:04,931 INFO L225 Difference]: With dead ends: 1462 [2021-05-03 13:51:04,931 INFO L226 Difference]: Without dead ends: 1462 [2021-05-03 13:51:04,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-05-03 13:51:04,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1165. [2021-05-03 13:51:04,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.0300687285223367) internal successors, (3527), 1164 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3527 transitions. [2021-05-03 13:51:04,949 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3527 transitions. Word has length 20 [2021-05-03 13:51:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:04,949 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3527 transitions. [2021-05-03 13:51:04,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3527 transitions. [2021-05-03 13:51:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:04,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:04,951 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:05,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-03 13:51:05,173 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:05,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1067009401, now seen corresponding path program 126 times [2021-05-03 13:51:05,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:05,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491709427] [2021-05-03 13:51:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491709427] [2021-05-03 13:51:05,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528082264] [2021-05-03 13:51:05,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:05,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:05,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860689397] [2021-05-03 13:51:05,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:05,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:05,322 INFO L87 Difference]: Start difference. First operand 1165 states and 3527 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:05,489 INFO L93 Difference]: Finished difference Result 1324 states and 3884 transitions. [2021-05-03 13:51:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:51:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:05,491 INFO L225 Difference]: With dead ends: 1324 [2021-05-03 13:51:05,491 INFO L226 Difference]: Without dead ends: 1324 [2021-05-03 13:51:05,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:51:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-05-03 13:51:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1168. [2021-05-03 13:51:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.0299914310197087) internal successors, (3536), 1167 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3536 transitions. [2021-05-03 13:51:05,504 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3536 transitions. Word has length 20 [2021-05-03 13:51:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:05,504 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3536 transitions. [2021-05-03 13:51:05,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3536 transitions. [2021-05-03 13:51:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:05,505 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:05,505 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:05,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,705 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash -181211121, now seen corresponding path program 127 times [2021-05-03 13:51:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:05,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351550412] [2021-05-03 13:51:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351550412] [2021-05-03 13:51:05,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680071961] [2021-05-03 13:51:05,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:05,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136141] [2021-05-03 13:51:05,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:05,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:05,868 INFO L87 Difference]: Start difference. First operand 1168 states and 3536 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:06,134 INFO L93 Difference]: Finished difference Result 1344 states and 3926 transitions. [2021-05-03 13:51:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:51:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:06,135 INFO L225 Difference]: With dead ends: 1344 [2021-05-03 13:51:06,135 INFO L226 Difference]: Without dead ends: 1344 [2021-05-03 13:51:06,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:51:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-05-03 13:51:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1174. [2021-05-03 13:51:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.029838022165388) internal successors, (3554), 1173 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3554 transitions. [2021-05-03 13:51:06,147 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3554 transitions. Word has length 20 [2021-05-03 13:51:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:06,147 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 3554 transitions. [2021-05-03 13:51:06,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3554 transitions. [2021-05-03 13:51:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:06,148 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:06,149 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:06,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:06,349 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1925572999, now seen corresponding path program 128 times [2021-05-03 13:51:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:06,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84640221] [2021-05-03 13:51:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:06,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84640221] [2021-05-03 13:51:06,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049174122] [2021-05-03 13:51:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:06,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:06,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:06,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:06,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:06,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903871676] [2021-05-03 13:51:06,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:06,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:06,507 INFO L87 Difference]: Start difference. First operand 1174 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:06,871 INFO L93 Difference]: Finished difference Result 1444 states and 4134 transitions. [2021-05-03 13:51:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:51:06,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:06,873 INFO L225 Difference]: With dead ends: 1444 [2021-05-03 13:51:06,873 INFO L226 Difference]: Without dead ends: 1444 [2021-05-03 13:51:06,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:51:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-05-03 13:51:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1198. [2021-05-03 13:51:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.0334168755221387) internal successors, (3631), 1197 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3631 transitions. [2021-05-03 13:51:06,887 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3631 transitions. Word has length 20 [2021-05-03 13:51:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:06,887 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3631 transitions. [2021-05-03 13:51:06,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3631 transitions. [2021-05-03 13:51:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:06,888 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:06,888 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:07,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,088 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -223223537, now seen corresponding path program 129 times [2021-05-03 13:51:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:07,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120675934] [2021-05-03 13:51:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120675934] [2021-05-03 13:51:07,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950085240] [2021-05-03 13:51:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:07,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:07,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840722355] [2021-05-03 13:51:07,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:07,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:07,275 INFO L87 Difference]: Start difference. First operand 1198 states and 3631 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:07,778 INFO L93 Difference]: Finished difference Result 1560 states and 4362 transitions. [2021-05-03 13:51:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:51:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:07,780 INFO L225 Difference]: With dead ends: 1560 [2021-05-03 13:51:07,780 INFO L226 Difference]: Without dead ends: 1560 [2021-05-03 13:51:07,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=597, Invalid=1043, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:51:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-05-03 13:51:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1182. [2021-05-03 13:51:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 3.0389500423370026) internal successors, (3589), 1181 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3589 transitions. [2021-05-03 13:51:07,793 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3589 transitions. Word has length 20 [2021-05-03 13:51:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:07,793 INFO L480 AbstractCegarLoop]: Abstraction has 1182 states and 3589 transitions. [2021-05-03 13:51:07,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3589 transitions. [2021-05-03 13:51:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:07,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:07,795 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:07,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-05-03 13:51:07,995 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 348231269, now seen corresponding path program 130 times [2021-05-03 13:51:07,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:07,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845992718] [2021-05-03 13:51:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:08,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845992718] [2021-05-03 13:51:08,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829067475] [2021-05-03 13:51:08,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:08,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:08,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190502956] [2021-05-03 13:51:08,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:08,142 INFO L87 Difference]: Start difference. First operand 1182 states and 3589 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:08,581 INFO L93 Difference]: Finished difference Result 1402 states and 3999 transitions. [2021-05-03 13:51:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:51:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:08,583 INFO L225 Difference]: With dead ends: 1402 [2021-05-03 13:51:08,583 INFO L226 Difference]: Without dead ends: 1396 [2021-05-03 13:51:08,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:51:08,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-05-03 13:51:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1135. [2021-05-03 13:51:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.0246913580246915) internal successors, (3430), 1134 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3430 transitions. [2021-05-03 13:51:08,596 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3430 transitions. Word has length 20 [2021-05-03 13:51:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:08,596 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 3430 transitions. [2021-05-03 13:51:08,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3430 transitions. [2021-05-03 13:51:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:08,597 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:08,597 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:08,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-03 13:51:08,797 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1583340277, now seen corresponding path program 131 times [2021-05-03 13:51:08,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:08,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506999173] [2021-05-03 13:51:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:08,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506999173] [2021-05-03 13:51:08,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278399587] [2021-05-03 13:51:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:08,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:08,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:08,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:08,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405351738] [2021-05-03 13:51:08,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:08,967 INFO L87 Difference]: Start difference. First operand 1135 states and 3430 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:09,328 INFO L93 Difference]: Finished difference Result 1746 states and 4918 transitions. [2021-05-03 13:51:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:51:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:09,330 INFO L225 Difference]: With dead ends: 1746 [2021-05-03 13:51:09,330 INFO L226 Difference]: Without dead ends: 1737 [2021-05-03 13:51:09,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:51:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2021-05-03 13:51:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1314. [2021-05-03 13:51:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.0662604722010665) internal successors, (4026), 1313 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4026 transitions. [2021-05-03 13:51:09,352 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4026 transitions. Word has length 20 [2021-05-03 13:51:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:09,352 INFO L480 AbstractCegarLoop]: Abstraction has 1314 states and 4026 transitions. [2021-05-03 13:51:09,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4026 transitions. [2021-05-03 13:51:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:09,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:09,354 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:09,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-03 13:51:09,575 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash -2047931381, now seen corresponding path program 132 times [2021-05-03 13:51:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:09,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079290872] [2021-05-03 13:51:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079290872] [2021-05-03 13:51:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489209825] [2021-05-03 13:51:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:09,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:09,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:09,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:09,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922893058] [2021-05-03 13:51:09,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:09,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:09,725 INFO L87 Difference]: Start difference. First operand 1314 states and 4026 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:10,148 INFO L93 Difference]: Finished difference Result 1701 states and 4827 transitions. [2021-05-03 13:51:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:51:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:10,150 INFO L225 Difference]: With dead ends: 1701 [2021-05-03 13:51:10,150 INFO L226 Difference]: Without dead ends: 1697 [2021-05-03 13:51:10,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:51:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2021-05-03 13:51:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1246. [2021-05-03 13:51:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.031325301204819) internal successors, (3774), 1245 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3774 transitions. [2021-05-03 13:51:10,166 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3774 transitions. Word has length 20 [2021-05-03 13:51:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:10,166 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 3774 transitions. [2021-05-03 13:51:10,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3774 transitions. [2021-05-03 13:51:10,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:10,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:10,168 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:10,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 13:51:10,368 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:10,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2081530609, now seen corresponding path program 133 times [2021-05-03 13:51:10,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:10,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712391116] [2021-05-03 13:51:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712391116] [2021-05-03 13:51:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136512694] [2021-05-03 13:51:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:10,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:10,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:10,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95750322] [2021-05-03 13:51:10,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:10,531 INFO L87 Difference]: Start difference. First operand 1246 states and 3774 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:10,919 INFO L93 Difference]: Finished difference Result 1682 states and 4760 transitions. [2021-05-03 13:51:10,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:51:10,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:10,921 INFO L225 Difference]: With dead ends: 1682 [2021-05-03 13:51:10,921 INFO L226 Difference]: Without dead ends: 1674 [2021-05-03 13:51:10,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:51:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-05-03 13:51:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1299. [2021-05-03 13:51:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 3.0338983050847457) internal successors, (3938), 1298 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3938 transitions. [2021-05-03 13:51:10,935 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3938 transitions. Word has length 20 [2021-05-03 13:51:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:10,935 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3938 transitions. [2021-05-03 13:51:10,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3938 transitions. [2021-05-03 13:51:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:10,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:10,936 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:11,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,149 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1171860619, now seen corresponding path program 134 times [2021-05-03 13:51:11,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118817316] [2021-05-03 13:51:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118817316] [2021-05-03 13:51:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879641641] [2021-05-03 13:51:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:11,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:11,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:11,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463553791] [2021-05-03 13:51:11,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:11,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:11,299 INFO L87 Difference]: Start difference. First operand 1299 states and 3938 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:11,649 INFO L93 Difference]: Finished difference Result 1724 states and 4914 transitions. [2021-05-03 13:51:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:51:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:11,651 INFO L225 Difference]: With dead ends: 1724 [2021-05-03 13:51:11,651 INFO L226 Difference]: Without dead ends: 1712 [2021-05-03 13:51:11,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=374, Invalid=1186, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 13:51:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-05-03 13:51:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1318. [2021-05-03 13:51:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.026575550493546) internal successors, (3986), 1317 states have internal predecessors, (3986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3986 transitions. [2021-05-03 13:51:11,667 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3986 transitions. Word has length 20 [2021-05-03 13:51:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:11,667 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3986 transitions. [2021-05-03 13:51:11,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3986 transitions. [2021-05-03 13:51:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:11,668 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:11,668 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:11,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-05-03 13:51:11,869 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1052226417, now seen corresponding path program 135 times [2021-05-03 13:51:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:11,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312257393] [2021-05-03 13:51:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312257393] [2021-05-03 13:51:11,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721282638] [2021-05-03 13:51:11,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:11,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:12,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:12,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 13:51:12,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315715121] [2021-05-03 13:51:12,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:12,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:12,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:12,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:12,027 INFO L87 Difference]: Start difference. First operand 1318 states and 3986 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:12,294 INFO L93 Difference]: Finished difference Result 1567 states and 4524 transitions. [2021-05-03 13:51:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:12,297 INFO L225 Difference]: With dead ends: 1567 [2021-05-03 13:51:12,297 INFO L226 Difference]: Without dead ends: 1559 [2021-05-03 13:51:12,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-05-03 13:51:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1318. [2021-05-03 13:51:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.023538344722855) internal successors, (3982), 1317 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3982 transitions. [2021-05-03 13:51:12,317 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3982 transitions. Word has length 20 [2021-05-03 13:51:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:12,317 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3982 transitions. [2021-05-03 13:51:12,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3982 transitions. [2021-05-03 13:51:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:12,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:12,319 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:12,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-05-03 13:51:12,540 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1727648907, now seen corresponding path program 136 times [2021-05-03 13:51:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:12,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911358040] [2021-05-03 13:51:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:12,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911358040] [2021-05-03 13:51:12,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238759388] [2021-05-03 13:51:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:12,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:12,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:12,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 13:51:12,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170417730] [2021-05-03 13:51:12,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:51:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:51:12,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:51:12,684 INFO L87 Difference]: Start difference. First operand 1318 states and 3982 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:12,778 INFO L93 Difference]: Finished difference Result 1464 states and 4346 transitions. [2021-05-03 13:51:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:51:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:12,780 INFO L225 Difference]: With dead ends: 1464 [2021-05-03 13:51:12,780 INFO L226 Difference]: Without dead ends: 1454 [2021-05-03 13:51:12,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-05-03 13:51:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1318. [2021-05-03 13:51:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.0227790432801824) internal successors, (3981), 1317 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3981 transitions. [2021-05-03 13:51:12,799 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3981 transitions. Word has length 20 [2021-05-03 13:51:12,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:12,799 INFO L480 AbstractCegarLoop]: Abstraction has 1318 states and 3981 transitions. [2021-05-03 13:51:12,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3981 transitions. [2021-05-03 13:51:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:12,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:12,800 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:13,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-05-03 13:51:13,015 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:13,016 INFO L82 PathProgramCache]: Analyzing trace with hash 205924307, now seen corresponding path program 137 times [2021-05-03 13:51:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111356904] [2021-05-03 13:51:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111356904] [2021-05-03 13:51:13,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745616702] [2021-05-03 13:51:13,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:13,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:13,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:13,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 13:51:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255976366] [2021-05-03 13:51:13,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:13,172 INFO L87 Difference]: Start difference. First operand 1318 states and 3981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:13,548 INFO L93 Difference]: Finished difference Result 1488 states and 4332 transitions. [2021-05-03 13:51:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:51:13,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:13,551 INFO L225 Difference]: With dead ends: 1488 [2021-05-03 13:51:13,551 INFO L226 Difference]: Without dead ends: 1488 [2021-05-03 13:51:13,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1012, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:51:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2021-05-03 13:51:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1320. [2021-05-03 13:51:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 3.0227445034116753) internal successors, (3987), 1319 states have internal predecessors, (3987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3987 transitions. [2021-05-03 13:51:13,566 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3987 transitions. Word has length 20 [2021-05-03 13:51:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:13,566 INFO L480 AbstractCegarLoop]: Abstraction has 1320 states and 3987 transitions. [2021-05-03 13:51:13,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3987 transitions. [2021-05-03 13:51:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:13,568 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:13,568 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:13,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,768 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1513301805, now seen corresponding path program 138 times [2021-05-03 13:51:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:13,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310415033] [2021-05-03 13:51:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310415033] [2021-05-03 13:51:13,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819822647] [2021-05-03 13:51:13,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:13,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:13,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:51:13,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443059057] [2021-05-03 13:51:13,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:13,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:13,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:13,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:13,914 INFO L87 Difference]: Start difference. First operand 1320 states and 3987 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:14,240 INFO L93 Difference]: Finished difference Result 1578 states and 4543 transitions. [2021-05-03 13:51:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:51:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:14,242 INFO L225 Difference]: With dead ends: 1578 [2021-05-03 13:51:14,242 INFO L226 Difference]: Without dead ends: 1572 [2021-05-03 13:51:14,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=359, Invalid=763, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:51:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-05-03 13:51:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1335. [2021-05-03 13:51:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.02023988005997) internal successors, (4029), 1334 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4029 transitions. [2021-05-03 13:51:14,258 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4029 transitions. Word has length 20 [2021-05-03 13:51:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:14,258 INFO L480 AbstractCegarLoop]: Abstraction has 1335 states and 4029 transitions. [2021-05-03 13:51:14,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4029 transitions. [2021-05-03 13:51:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:14,259 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:14,259 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:14,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,461 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1479280595, now seen corresponding path program 139 times [2021-05-03 13:51:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:14,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726686106] [2021-05-03 13:51:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:14,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726686106] [2021-05-03 13:51:14,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175452342] [2021-05-03 13:51:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:14,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:14,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:14,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:51:14,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171609260] [2021-05-03 13:51:14,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:14,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:14,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:14,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:14,609 INFO L87 Difference]: Start difference. First operand 1335 states and 4029 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:14,915 INFO L93 Difference]: Finished difference Result 1610 states and 4633 transitions. [2021-05-03 13:51:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:14,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:14,917 INFO L225 Difference]: With dead ends: 1610 [2021-05-03 13:51:14,917 INFO L226 Difference]: Without dead ends: 1606 [2021-05-03 13:51:14,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=383, Invalid=739, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:51:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-05-03 13:51:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1324. [2021-05-03 13:51:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.018896447467876) internal successors, (3994), 1323 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3994 transitions. [2021-05-03 13:51:14,932 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3994 transitions. Word has length 20 [2021-05-03 13:51:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:14,932 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3994 transitions. [2021-05-03 13:51:14,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3994 transitions. [2021-05-03 13:51:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:14,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:14,934 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:15,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-05-03 13:51:15,135 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1437268179, now seen corresponding path program 140 times [2021-05-03 13:51:15,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:15,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456845685] [2021-05-03 13:51:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:15,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456845685] [2021-05-03 13:51:15,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116640296] [2021-05-03 13:51:15,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:15,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:15,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:15,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:15,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:51:15,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591030635] [2021-05-03 13:51:15,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:15,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:15,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:15,281 INFO L87 Difference]: Start difference. First operand 1324 states and 3994 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:15,702 INFO L93 Difference]: Finished difference Result 1777 states and 4996 transitions. [2021-05-03 13:51:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:51:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:15,705 INFO L225 Difference]: With dead ends: 1777 [2021-05-03 13:51:15,705 INFO L226 Difference]: Without dead ends: 1777 [2021-05-03 13:51:15,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=545, Invalid=937, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:51:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-05-03 13:51:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1334. [2021-05-03 13:51:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.0270067516879218) internal successors, (4035), 1333 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4035 transitions. [2021-05-03 13:51:15,720 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4035 transitions. Word has length 20 [2021-05-03 13:51:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:15,720 INFO L480 AbstractCegarLoop]: Abstraction has 1334 states and 4035 transitions. [2021-05-03 13:51:15,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4035 transitions. [2021-05-03 13:51:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:15,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:15,721 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:15,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-03 13:51:15,922 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2008722985, now seen corresponding path program 141 times [2021-05-03 13:51:15,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:15,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181029954] [2021-05-03 13:51:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:15,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181029954] [2021-05-03 13:51:15,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788242491] [2021-05-03 13:51:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:15,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:51:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:16,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:16,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-03 13:51:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521746890] [2021-05-03 13:51:16,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:16,084 INFO L87 Difference]: Start difference. First operand 1334 states and 4035 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:16,561 INFO L93 Difference]: Finished difference Result 1692 states and 4755 transitions. [2021-05-03 13:51:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:51:16,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:16,563 INFO L225 Difference]: With dead ends: 1692 [2021-05-03 13:51:16,564 INFO L226 Difference]: Without dead ends: 1683 [2021-05-03 13:51:16,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=782, Invalid=1570, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:51:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-05-03 13:51:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1280. [2021-05-03 13:51:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.0101641907740424) internal successors, (3850), 1279 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3850 transitions. [2021-05-03 13:51:16,582 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3850 transitions. Word has length 20 [2021-05-03 13:51:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:16,582 INFO L480 AbstractCegarLoop]: Abstraction has 1280 states and 3850 transitions. [2021-05-03 13:51:16,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3850 transitions. [2021-05-03 13:51:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:16,584 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:16,584 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:16,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-03 13:51:16,797 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1751014509, now seen corresponding path program 142 times [2021-05-03 13:51:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:16,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534395126] [2021-05-03 13:51:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:16,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534395126] [2021-05-03 13:51:16,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020256639] [2021-05-03 13:51:16,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:16,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:16,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:16,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:16,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 13:51:16,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275015696] [2021-05-03 13:51:16,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:16,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:16,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:16,978 INFO L87 Difference]: Start difference. First operand 1280 states and 3850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:17,448 INFO L93 Difference]: Finished difference Result 1586 states and 4510 transitions. [2021-05-03 13:51:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:51:17,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:17,451 INFO L225 Difference]: With dead ends: 1586 [2021-05-03 13:51:17,451 INFO L226 Difference]: Without dead ends: 1574 [2021-05-03 13:51:17,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:51:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-05-03 13:51:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1291. [2021-05-03 13:51:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.011627906976744) internal successors, (3885), 1290 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 3885 transitions. [2021-05-03 13:51:17,465 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 3885 transitions. Word has length 20 [2021-05-03 13:51:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:17,465 INFO L480 AbstractCegarLoop]: Abstraction has 1291 states and 3885 transitions. [2021-05-03 13:51:17,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 3885 transitions. [2021-05-03 13:51:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:17,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:17,467 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:17,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-03 13:51:17,667 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:17,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1012163591, now seen corresponding path program 143 times [2021-05-03 13:51:17,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:17,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917025912] [2021-05-03 13:51:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:17,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917025912] [2021-05-03 13:51:17,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336285484] [2021-05-03 13:51:17,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:17,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:17,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:17,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:17,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 13:51:17,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157767958] [2021-05-03 13:51:17,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:17,840 INFO L87 Difference]: Start difference. First operand 1291 states and 3885 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:18,247 INFO L93 Difference]: Finished difference Result 1481 states and 4275 transitions. [2021-05-03 13:51:18,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:51:18,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:18,249 INFO L225 Difference]: With dead ends: 1481 [2021-05-03 13:51:18,249 INFO L226 Difference]: Without dead ends: 1481 [2021-05-03 13:51:18,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=544, Invalid=1262, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 13:51:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-05-03 13:51:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1282. [2021-05-03 13:51:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.0101483216237312) internal successors, (3856), 1281 states have internal predecessors, (3856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3856 transitions. [2021-05-03 13:51:18,262 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3856 transitions. Word has length 20 [2021-05-03 13:51:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:18,263 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 3856 transitions. [2021-05-03 13:51:18,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3856 transitions. [2021-05-03 13:51:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:18,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:18,264 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:18,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-03 13:51:18,469 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 141559951, now seen corresponding path program 144 times [2021-05-03 13:51:18,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:18,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592126959] [2021-05-03 13:51:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:18,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592126959] [2021-05-03 13:51:18,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526938034] [2021-05-03 13:51:18,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:18,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:18,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:18,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:18,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:18,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 13:51:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925362373] [2021-05-03 13:51:18,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:18,632 INFO L87 Difference]: Start difference. First operand 1282 states and 3856 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:18,983 INFO L93 Difference]: Finished difference Result 1620 states and 4620 transitions. [2021-05-03 13:51:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:18,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:18,985 INFO L225 Difference]: With dead ends: 1620 [2021-05-03 13:51:18,985 INFO L226 Difference]: Without dead ends: 1614 [2021-05-03 13:51:18,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:51:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-05-03 13:51:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1305. [2021-05-03 13:51:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.013803680981595) internal successors, (3930), 1304 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 3930 transitions. [2021-05-03 13:51:18,999 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 3930 transitions. Word has length 20 [2021-05-03 13:51:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:18,999 INFO L480 AbstractCegarLoop]: Abstraction has 1305 states and 3930 transitions. [2021-05-03 13:51:18,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 3930 transitions. [2021-05-03 13:51:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:19,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:19,000 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:19,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,202 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:19,202 INFO L82 PathProgramCache]: Analyzing trace with hash 529117959, now seen corresponding path program 145 times [2021-05-03 13:51:19,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:19,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99381562] [2021-05-03 13:51:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99381562] [2021-05-03 13:51:19,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538913576] [2021-05-03 13:51:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:19,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-05-03 13:51:19,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739449997] [2021-05-03 13:51:19,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:19,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:19,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:19,349 INFO L87 Difference]: Start difference. First operand 1305 states and 3930 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:19,706 INFO L93 Difference]: Finished difference Result 1830 states and 5202 transitions. [2021-05-03 13:51:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:51:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:19,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:19,708 INFO L225 Difference]: With dead ends: 1830 [2021-05-03 13:51:19,708 INFO L226 Difference]: Without dead ends: 1828 [2021-05-03 13:51:19,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-05-03 13:51:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1345. [2021-05-03 13:51:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.013392857142857) internal successors, (4050), 1344 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4050 transitions. [2021-05-03 13:51:19,724 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4050 transitions. Word has length 20 [2021-05-03 13:51:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:19,724 INFO L480 AbstractCegarLoop]: Abstraction has 1345 states and 4050 transitions. [2021-05-03 13:51:19,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4050 transitions. [2021-05-03 13:51:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:19,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:19,725 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:19,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-05-03 13:51:19,926 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1372903823, now seen corresponding path program 146 times [2021-05-03 13:51:19,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:19,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559151830] [2021-05-03 13:51:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559151830] [2021-05-03 13:51:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222652134] [2021-05-03 13:51:19,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:19,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:20,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:20,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-05-03 13:51:20,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136491908] [2021-05-03 13:51:20,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:20,094 INFO L87 Difference]: Start difference. First operand 1345 states and 4050 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:20,488 INFO L93 Difference]: Finished difference Result 1888 states and 5315 transitions. [2021-05-03 13:51:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:51:20,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:20,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:20,491 INFO L225 Difference]: With dead ends: 1888 [2021-05-03 13:51:20,491 INFO L226 Difference]: Without dead ends: 1888 [2021-05-03 13:51:20,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=495, Invalid=837, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:51:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-05-03 13:51:20,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1399. [2021-05-03 13:51:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.0257510729613735) internal successors, (4230), 1398 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4230 transitions. [2021-05-03 13:51:20,509 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4230 transitions. Word has length 20 [2021-05-03 13:51:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:20,509 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4230 transitions. [2021-05-03 13:51:20,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4230 transitions. [2021-05-03 13:51:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:20,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:20,510 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:20,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-05-03 13:51:20,711 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1944358629, now seen corresponding path program 147 times [2021-05-03 13:51:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:20,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551459810] [2021-05-03 13:51:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551459810] [2021-05-03 13:51:20,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933920479] [2021-05-03 13:51:20,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:20,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:20,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:20,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-05-03 13:51:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779079864] [2021-05-03 13:51:20,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:20,870 INFO L87 Difference]: Start difference. First operand 1399 states and 4230 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:21,425 INFO L93 Difference]: Finished difference Result 1840 states and 5179 transitions. [2021-05-03 13:51:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:51:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:21,427 INFO L225 Difference]: With dead ends: 1840 [2021-05-03 13:51:21,427 INFO L226 Difference]: Without dead ends: 1831 [2021-05-03 13:51:21,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=855, Invalid=1797, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:51:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-05-03 13:51:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1368. [2021-05-03 13:51:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.015362106803219) internal successors, (4122), 1367 states have internal predecessors, (4122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4122 transitions. [2021-05-03 13:51:21,443 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4122 transitions. Word has length 20 [2021-05-03 13:51:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:21,443 INFO L480 AbstractCegarLoop]: Abstraction has 1368 states and 4122 transitions. [2021-05-03 13:51:21,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4122 transitions. [2021-05-03 13:51:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:21,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:21,444 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:21,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:21,661 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1815378865, now seen corresponding path program 148 times [2021-05-03 13:51:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:21,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051272236] [2021-05-03 13:51:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:21,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051272236] [2021-05-03 13:51:21,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723257457] [2021-05-03 13:51:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:21,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:21,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:21,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-05-03 13:51:21,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270534327] [2021-05-03 13:51:21,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:21,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:21,820 INFO L87 Difference]: Start difference. First operand 1368 states and 4122 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:22,331 INFO L93 Difference]: Finished difference Result 1834 states and 5156 transitions. [2021-05-03 13:51:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:51:22,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:22,334 INFO L225 Difference]: With dead ends: 1834 [2021-05-03 13:51:22,334 INFO L226 Difference]: Without dead ends: 1822 [2021-05-03 13:51:22,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=776, Invalid=1774, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:51:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-05-03 13:51:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1349. [2021-05-03 13:51:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.015578635014837) internal successors, (4065), 1348 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4065 transitions. [2021-05-03 13:51:22,357 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4065 transitions. Word has length 20 [2021-05-03 13:51:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:22,358 INFO L480 AbstractCegarLoop]: Abstraction has 1349 states and 4065 transitions. [2021-05-03 13:51:22,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4065 transitions. [2021-05-03 13:51:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:22,360 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:22,360 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:22,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:22,562 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:22,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1891843109, now seen corresponding path program 149 times [2021-05-03 13:51:22,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:22,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638199992] [2021-05-03 13:51:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:22,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:22,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638199992] [2021-05-03 13:51:22,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158893795] [2021-05-03 13:51:22,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:22,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:22,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:22,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:22,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:22,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 13:51:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743517950] [2021-05-03 13:51:22,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:22,754 INFO L87 Difference]: Start difference. First operand 1349 states and 4065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:23,279 INFO L93 Difference]: Finished difference Result 1747 states and 4974 transitions. [2021-05-03 13:51:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 13:51:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:23,281 INFO L225 Difference]: With dead ends: 1747 [2021-05-03 13:51:23,281 INFO L226 Difference]: Without dead ends: 1729 [2021-05-03 13:51:23,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:51:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-05-03 13:51:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1363. [2021-05-03 13:51:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.0198237885462555) internal successors, (4113), 1362 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4113 transitions. [2021-05-03 13:51:23,295 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4113 transitions. Word has length 20 [2021-05-03 13:51:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:23,295 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 4113 transitions. [2021-05-03 13:51:23,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4113 transitions. [2021-05-03 13:51:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:23,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:23,297 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:23,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:23,497 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash 235777619, now seen corresponding path program 150 times [2021-05-03 13:51:23,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:23,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247929447] [2021-05-03 13:51:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:23,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247929447] [2021-05-03 13:51:23,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649879787] [2021-05-03 13:51:23,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:23,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:23,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:23,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 13:51:23,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966600984] [2021-05-03 13:51:23,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:51:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:51:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:23,693 INFO L87 Difference]: Start difference. First operand 1363 states and 4113 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:24,129 INFO L93 Difference]: Finished difference Result 1698 states and 4871 transitions. [2021-05-03 13:51:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:51:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:24,131 INFO L225 Difference]: With dead ends: 1698 [2021-05-03 13:51:24,131 INFO L226 Difference]: Without dead ends: 1698 [2021-05-03 13:51:24,131 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=603, Invalid=1467, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 13:51:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-05-03 13:51:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1400. [2021-05-03 13:51:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 3.013581129378127) internal successors, (4216), 1399 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 4216 transitions. [2021-05-03 13:51:24,146 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 4216 transitions. Word has length 20 [2021-05-03 13:51:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:24,146 INFO L480 AbstractCegarLoop]: Abstraction has 1400 states and 4216 transitions. [2021-05-03 13:51:24,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 4216 transitions. [2021-05-03 13:51:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:24,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:24,147 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:24,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:24,348 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash -97333165, now seen corresponding path program 151 times [2021-05-03 13:51:24,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:24,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530220671] [2021-05-03 13:51:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:24,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530220671] [2021-05-03 13:51:24,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092491329] [2021-05-03 13:51:24,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:24,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:24,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:24,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:24,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 13:51:24,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802360424] [2021-05-03 13:51:24,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:24,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:24,521 INFO L87 Difference]: Start difference. First operand 1400 states and 4216 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:24,914 INFO L93 Difference]: Finished difference Result 1946 states and 5516 transitions. [2021-05-03 13:51:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:51:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:24,916 INFO L225 Difference]: With dead ends: 1946 [2021-05-03 13:51:24,916 INFO L226 Difference]: Without dead ends: 1946 [2021-05-03 13:51:24,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=468, Invalid=1092, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 13:51:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-05-03 13:51:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1486. [2021-05-03 13:51:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.0202020202020203) internal successors, (4485), 1485 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4485 transitions. [2021-05-03 13:51:24,933 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4485 transitions. Word has length 20 [2021-05-03 13:51:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:24,933 INFO L480 AbstractCegarLoop]: Abstraction has 1486 states and 4485 transitions. [2021-05-03 13:51:24,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4485 transitions. [2021-05-03 13:51:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:24,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:24,934 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:25,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-05-03 13:51:25,135 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:25,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1138847315, now seen corresponding path program 152 times [2021-05-03 13:51:25,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:25,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271685117] [2021-05-03 13:51:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:25,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271685117] [2021-05-03 13:51:25,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581302545] [2021-05-03 13:51:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:25,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:25,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-05-03 13:51:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126954791] [2021-05-03 13:51:25,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:25,295 INFO L87 Difference]: Start difference. First operand 1486 states and 4485 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:25,673 INFO L93 Difference]: Finished difference Result 2146 states and 6136 transitions. [2021-05-03 13:51:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:51:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:25,677 INFO L225 Difference]: With dead ends: 2146 [2021-05-03 13:51:25,677 INFO L226 Difference]: Without dead ends: 2146 [2021-05-03 13:51:25,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=438, Invalid=894, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:51:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2021-05-03 13:51:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1603. [2021-05-03 13:51:25,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.034956304619226) internal successors, (4862), 1602 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4862 transitions. [2021-05-03 13:51:25,697 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4862 transitions. Word has length 20 [2021-05-03 13:51:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:25,697 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 4862 transitions. [2021-05-03 13:51:25,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4862 transitions. [2021-05-03 13:51:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:25,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:25,699 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:25,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,900 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:25,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:25,900 INFO L82 PathProgramCache]: Analyzing trace with hash -622391213, now seen corresponding path program 153 times [2021-05-03 13:51:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:25,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115290972] [2021-05-03 13:51:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:25,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115290972] [2021-05-03 13:51:25,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644757197] [2021-05-03 13:51:25,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:25,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:26,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:26,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-05-03 13:51:26,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417873428] [2021-05-03 13:51:26,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:26,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:26,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:26,061 INFO L87 Difference]: Start difference. First operand 1603 states and 4862 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:26,470 INFO L93 Difference]: Finished difference Result 2514 states and 7203 transitions. [2021-05-03 13:51:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:51:26,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:26,474 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 13:51:26,474 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 13:51:26,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=491, Invalid=841, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:51:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 13:51:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1911. [2021-05-03 13:51:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.0701570680628274) internal successors, (5864), 1910 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5864 transitions. [2021-05-03 13:51:26,498 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5864 transitions. Word has length 20 [2021-05-03 13:51:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:26,498 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 5864 transitions. [2021-05-03 13:51:26,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5864 transitions. [2021-05-03 13:51:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:26,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:26,500 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:26,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-03 13:51:26,701 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash -50936407, now seen corresponding path program 154 times [2021-05-03 13:51:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:26,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626342677] [2021-05-03 13:51:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:26,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626342677] [2021-05-03 13:51:26,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237594342] [2021-05-03 13:51:26,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:26,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:26,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:26,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:26,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:26,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:26,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-05-03 13:51:26,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922803204] [2021-05-03 13:51:26,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:51:26,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:26,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:51:26,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:26,908 INFO L87 Difference]: Start difference. First operand 1911 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:27,572 INFO L93 Difference]: Finished difference Result 2413 states and 6919 transitions. [2021-05-03 13:51:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:51:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:27,576 INFO L225 Difference]: With dead ends: 2413 [2021-05-03 13:51:27,576 INFO L226 Difference]: Without dead ends: 2407 [2021-05-03 13:51:27,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=988, Invalid=2204, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 13:51:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-05-03 13:51:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1890. [2021-05-03 13:51:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.062466913710958) internal successors, (5785), 1889 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 5785 transitions. [2021-05-03 13:51:27,598 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 5785 transitions. Word has length 20 [2021-05-03 13:51:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:27,598 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 5785 transitions. [2021-05-03 13:51:27,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 5785 transitions. [2021-05-03 13:51:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:27,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:27,600 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:27,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-05-03 13:51:27,801 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash 484293395, now seen corresponding path program 155 times [2021-05-03 13:51:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27894391] [2021-05-03 13:51:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:27,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27894391] [2021-05-03 13:51:27,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134582901] [2021-05-03 13:51:27,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:27,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:51:27,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:27,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:27,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-05-03 13:51:27,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869606599] [2021-05-03 13:51:27,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:27,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:27,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:27,967 INFO L87 Difference]: Start difference. First operand 1890 states and 5785 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:28,531 INFO L93 Difference]: Finished difference Result 2435 states and 6986 transitions. [2021-05-03 13:51:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:51:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:28,534 INFO L225 Difference]: With dead ends: 2435 [2021-05-03 13:51:28,534 INFO L226 Difference]: Without dead ends: 2423 [2021-05-03 13:51:28,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=842, Invalid=2020, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:51:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-05-03 13:51:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1924. [2021-05-03 13:51:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.068642745709828) internal successors, (5901), 1923 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5901 transitions. [2021-05-03 13:51:28,557 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5901 transitions. Word has length 20 [2021-05-03 13:51:28,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:28,558 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5901 transitions. [2021-05-03 13:51:28,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5901 transitions. [2021-05-03 13:51:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:28,559 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:28,559 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:28,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-05-03 13:51:28,760 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash -103451927, now seen corresponding path program 156 times [2021-05-03 13:51:28,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:28,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453095039] [2021-05-03 13:51:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:28,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453095039] [2021-05-03 13:51:28,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643770437] [2021-05-03 13:51:28,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:28,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:28,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:28,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:28,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:28,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:28,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-05-03 13:51:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385540502] [2021-05-03 13:51:28,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:28,934 INFO L87 Difference]: Start difference. First operand 1924 states and 5901 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:29,459 INFO L93 Difference]: Finished difference Result 2515 states and 7235 transitions. [2021-05-03 13:51:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:51:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:29,462 INFO L225 Difference]: With dead ends: 2515 [2021-05-03 13:51:29,462 INFO L226 Difference]: Without dead ends: 2497 [2021-05-03 13:51:29,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=743, Invalid=1909, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:51:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-05-03 13:51:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1989. [2021-05-03 13:51:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.0759557344064388) internal successors, (6115), 1988 states have internal predecessors, (6115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6115 transitions. [2021-05-03 13:51:29,495 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6115 transitions. Word has length 20 [2021-05-03 13:51:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:29,495 INFO L480 AbstractCegarLoop]: Abstraction has 1989 states and 6115 transitions. [2021-05-03 13:51:29,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6115 transitions. [2021-05-03 13:51:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 13:51:29,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:29,497 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:29,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:29,698 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:29,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:29,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1143687725, now seen corresponding path program 157 times [2021-05-03 13:51:29,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:29,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196134608] [2021-05-03 13:51:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:29,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196134608] [2021-05-03 13:51:29,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068423768] [2021-05-03 13:51:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:29,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:51:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:29,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:29,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 13:51:29,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357960781] [2021-05-03 13:51:29,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:51:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:51:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:29,891 INFO L87 Difference]: Start difference. First operand 1989 states and 6115 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:30,392 INFO L93 Difference]: Finished difference Result 2460 states and 7169 transitions. [2021-05-03 13:51:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:51:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 13:51:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:30,395 INFO L225 Difference]: With dead ends: 2460 [2021-05-03 13:51:30,396 INFO L226 Difference]: Without dead ends: 2436 [2021-05-03 13:51:30,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:51:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-03 13:51:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 2023. [2021-05-03 13:51:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.073689416419387) internal successors, (6215), 2022 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:30,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6215 transitions. [2021-05-03 13:51:30,421 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6215 transitions. Word has length 20 [2021-05-03 13:51:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:30,421 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6215 transitions. [2021-05-03 13:51:30,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6215 transitions. [2021-05-03 13:51:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:30,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:30,423 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:30,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-05-03 13:51:30,624 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash -950598133, now seen corresponding path program 158 times [2021-05-03 13:51:30,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:30,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572299676] [2021-05-03 13:51:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572299676] [2021-05-03 13:51:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330137263] [2021-05-03 13:51:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:30,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:30,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:30,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:30,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:30,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:30,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781109559] [2021-05-03 13:51:30,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:30,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:30,963 INFO L87 Difference]: Start difference. First operand 2023 states and 6215 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:31,385 INFO L93 Difference]: Finished difference Result 2290 states and 6704 transitions. [2021-05-03 13:51:31,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:51:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:31,388 INFO L225 Difference]: With dead ends: 2290 [2021-05-03 13:51:31,388 INFO L226 Difference]: Without dead ends: 2264 [2021-05-03 13:51:31,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-05-03 13:51:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2067. [2021-05-03 13:51:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.054211035818006) internal successors, (6310), 2066 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 6310 transitions. [2021-05-03 13:51:31,410 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 6310 transitions. Word has length 21 [2021-05-03 13:51:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:31,410 INFO L480 AbstractCegarLoop]: Abstraction has 2067 states and 6310 transitions. [2021-05-03 13:51:31,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 6310 transitions. [2021-05-03 13:51:31,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:31,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:31,413 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:31,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:31,617 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2035301631, now seen corresponding path program 159 times [2021-05-03 13:51:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:31,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529774942] [2021-05-03 13:51:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529774942] [2021-05-03 13:51:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995966970] [2021-05-03 13:51:31,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:31,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:31,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:31,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:31,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:31,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218217990] [2021-05-03 13:51:31,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:31,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:31,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:31,890 INFO L87 Difference]: Start difference. First operand 2067 states and 6310 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:32,127 INFO L93 Difference]: Finished difference Result 2347 states and 6861 transitions. [2021-05-03 13:51:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:32,130 INFO L225 Difference]: With dead ends: 2347 [2021-05-03 13:51:32,130 INFO L226 Difference]: Without dead ends: 2340 [2021-05-03 13:51:32,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-05-03 13:51:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2120. [2021-05-03 13:51:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.06465313827277) internal successors, (6494), 2119 states have internal predecessors, (6494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 6494 transitions. [2021-05-03 13:51:32,153 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 6494 transitions. Word has length 21 [2021-05-03 13:51:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:32,153 INFO L480 AbstractCegarLoop]: Abstraction has 2120 states and 6494 transitions. [2021-05-03 13:51:32,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 6494 transitions. [2021-05-03 13:51:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:32,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:32,155 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:32,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:32,356 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash -644962941, now seen corresponding path program 160 times [2021-05-03 13:51:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:32,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150436443] [2021-05-03 13:51:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:32,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150436443] [2021-05-03 13:51:32,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992951787] [2021-05-03 13:51:32,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:32,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:32,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:32,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:32,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:32,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543382701] [2021-05-03 13:51:32,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:32,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:32,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:32,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:32,629 INFO L87 Difference]: Start difference. First operand 2120 states and 6494 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:32,936 INFO L93 Difference]: Finished difference Result 2333 states and 6841 transitions. [2021-05-03 13:51:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:32,940 INFO L225 Difference]: With dead ends: 2333 [2021-05-03 13:51:32,940 INFO L226 Difference]: Without dead ends: 2317 [2021-05-03 13:51:32,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-05-03 13:51:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-05-03 13:51:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-05-03 13:51:32,963 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-05-03 13:51:32,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:32,963 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-05-03 13:51:32,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-05-03 13:51:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:32,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:32,965 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:33,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-05-03 13:51:33,165 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:33,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:33,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1688210859, now seen corresponding path program 161 times [2021-05-03 13:51:33,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:33,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989162650] [2021-05-03 13:51:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:33,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989162650] [2021-05-03 13:51:33,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903833698] [2021-05-03 13:51:33,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:33,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:51:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:33,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:33,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819772010] [2021-05-03 13:51:33,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:33,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:33,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:33,475 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:33,747 INFO L93 Difference]: Finished difference Result 2307 states and 6745 transitions. [2021-05-03 13:51:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:33,750 INFO L225 Difference]: With dead ends: 2307 [2021-05-03 13:51:33,750 INFO L226 Difference]: Without dead ends: 2300 [2021-05-03 13:51:33,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-05-03 13:51:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2083. [2021-05-03 13:51:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-05-03 13:51:33,773 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-05-03 13:51:33,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:33,773 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-05-03 13:51:33,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-05-03 13:51:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:33,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:33,775 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:33,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:33,976 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1152981057, now seen corresponding path program 162 times [2021-05-03 13:51:33,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:33,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650491050] [2021-05-03 13:51:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:34,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650491050] [2021-05-03 13:51:34,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974601646] [2021-05-03 13:51:34,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:34,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:34,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265445950] [2021-05-03 13:51:34,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:34,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:34,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:34,273 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:34,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:34,605 INFO L93 Difference]: Finished difference Result 2324 states and 6770 transitions. [2021-05-03 13:51:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:51:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:34,609 INFO L225 Difference]: With dead ends: 2324 [2021-05-03 13:51:34,609 INFO L226 Difference]: Without dead ends: 2317 [2021-05-03 13:51:34,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-05-03 13:51:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2083. [2021-05-03 13:51:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:34,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-05-03 13:51:34,642 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-05-03 13:51:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:34,642 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-05-03 13:51:34,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-05-03 13:51:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:34,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:34,645 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:34,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:34,867 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:34,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1740726379, now seen corresponding path program 163 times [2021-05-03 13:51:34,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:34,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585338554] [2021-05-03 13:51:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:35,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585338554] [2021-05-03 13:51:35,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180564218] [2021-05-03 13:51:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:35,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:35,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:35,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:35,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485436676] [2021-05-03 13:51:35,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:35,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:35,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:35,214 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:35,627 INFO L93 Difference]: Finished difference Result 2260 states and 6660 transitions. [2021-05-03 13:51:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:51:35,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:35,631 INFO L225 Difference]: With dead ends: 2260 [2021-05-03 13:51:35,631 INFO L226 Difference]: Without dead ends: 2253 [2021-05-03 13:51:35,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-05-03 13:51:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2083. [2021-05-03 13:51:35,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 3.063400576368876) internal successors, (6378), 2082 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 6378 transitions. [2021-05-03 13:51:35,653 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 6378 transitions. Word has length 21 [2021-05-03 13:51:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:35,653 INFO L480 AbstractCegarLoop]: Abstraction has 2083 states and 6378 transitions. [2021-05-03 13:51:35,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 6378 transitions. [2021-05-03 13:51:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:35,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:35,655 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:35,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-03 13:51:35,855 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -922738373, now seen corresponding path program 164 times [2021-05-03 13:51:35,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:35,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673140627] [2021-05-03 13:51:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:36,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673140627] [2021-05-03 13:51:36,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583782860] [2021-05-03 13:51:36,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:36,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:36,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:36,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:36,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706767837] [2021-05-03 13:51:36,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:36,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:36,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:36,245 INFO L87 Difference]: Start difference. First operand 2083 states and 6378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:36,483 INFO L93 Difference]: Finished difference Result 2270 states and 6764 transitions. [2021-05-03 13:51:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:36,486 INFO L225 Difference]: With dead ends: 2270 [2021-05-03 13:51:36,487 INFO L226 Difference]: Without dead ends: 2263 [2021-05-03 13:51:36,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-05-03 13:51:36,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2113. [2021-05-03 13:51:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.071022727272727) internal successors, (6486), 2112 states have internal predecessors, (6486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6486 transitions. [2021-05-03 13:51:36,512 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6486 transitions. Word has length 21 [2021-05-03 13:51:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:36,512 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6486 transitions. [2021-05-03 13:51:36,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6486 transitions. [2021-05-03 13:51:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:36,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:36,516 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:36,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-03 13:51:36,736 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash 691964351, now seen corresponding path program 165 times [2021-05-03 13:51:36,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:36,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996107182] [2021-05-03 13:51:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:36,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996107182] [2021-05-03 13:51:36,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407831512] [2021-05-03 13:51:36,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:36,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:51:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:37,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:37,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771902414] [2021-05-03 13:51:37,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:37,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:37,151 INFO L87 Difference]: Start difference. First operand 2113 states and 6486 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:37,428 INFO L93 Difference]: Finished difference Result 2271 states and 6761 transitions. [2021-05-03 13:51:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:37,431 INFO L225 Difference]: With dead ends: 2271 [2021-05-03 13:51:37,431 INFO L226 Difference]: Without dead ends: 2262 [2021-05-03 13:51:37,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-05-03 13:51:37,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2113. [2021-05-03 13:51:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-05-03 13:51:37,453 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-05-03 13:51:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:37,453 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-05-03 13:51:37,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-05-03 13:51:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:37,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:37,455 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:37,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-05-03 13:51:37,656 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1387329477, now seen corresponding path program 166 times [2021-05-03 13:51:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:37,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654207507] [2021-05-03 13:51:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:37,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654207507] [2021-05-03 13:51:37,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967762242] [2021-05-03 13:51:37,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:51:37,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:38,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:38,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538994682] [2021-05-03 13:51:38,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:38,005 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:38,231 INFO L93 Difference]: Finished difference Result 2235 states and 6688 transitions. [2021-05-03 13:51:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:38,235 INFO L225 Difference]: With dead ends: 2235 [2021-05-03 13:51:38,235 INFO L226 Difference]: Without dead ends: 2228 [2021-05-03 13:51:38,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-05-03 13:51:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2113. [2021-05-03 13:51:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.069128787878788) internal successors, (6482), 2112 states have internal predecessors, (6482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6482 transitions. [2021-05-03 13:51:38,257 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6482 transitions. Word has length 21 [2021-05-03 13:51:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:38,257 INFO L480 AbstractCegarLoop]: Abstraction has 2113 states and 6482 transitions. [2021-05-03 13:51:38,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6482 transitions. [2021-05-03 13:51:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:38,259 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:38,259 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:38,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:38,459 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:38,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1867302015, now seen corresponding path program 167 times [2021-05-03 13:51:38,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:38,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148505323] [2021-05-03 13:51:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:38,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148505323] [2021-05-03 13:51:38,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585749266] [2021-05-03 13:51:38,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:38,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:51:38,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:38,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:38,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:38,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:38,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349849109] [2021-05-03 13:51:38,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:38,794 INFO L87 Difference]: Start difference. First operand 2113 states and 6482 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:39,087 INFO L93 Difference]: Finished difference Result 2462 states and 7260 transitions. [2021-05-03 13:51:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:39,091 INFO L225 Difference]: With dead ends: 2462 [2021-05-03 13:51:39,091 INFO L226 Difference]: Without dead ends: 2445 [2021-05-03 13:51:39,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:39,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-05-03 13:51:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2200. [2021-05-03 13:51:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.083674397453388) internal successors, (6781), 2199 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 6781 transitions. [2021-05-03 13:51:39,117 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 6781 transitions. Word has length 21 [2021-05-03 13:51:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:39,117 INFO L480 AbstractCegarLoop]: Abstraction has 2200 states and 6781 transitions. [2021-05-03 13:51:39,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 6781 transitions. [2021-05-03 13:51:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:39,120 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:39,120 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:39,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-05-03 13:51:39,321 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash -812962557, now seen corresponding path program 168 times [2021-05-03 13:51:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:39,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424133528] [2021-05-03 13:51:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:39,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:39,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424133528] [2021-05-03 13:51:39,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298306334] [2021-05-03 13:51:39,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:39,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:51:39,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:39,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:39,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:39,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:39,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:39,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741633574] [2021-05-03 13:51:39,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:39,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:39,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:39,669 INFO L87 Difference]: Start difference. First operand 2200 states and 6781 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:39,943 INFO L93 Difference]: Finished difference Result 2464 states and 7241 transitions. [2021-05-03 13:51:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:39,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:39,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:39,947 INFO L225 Difference]: With dead ends: 2464 [2021-05-03 13:51:39,947 INFO L226 Difference]: Without dead ends: 2446 [2021-05-03 13:51:39,947 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-05-03 13:51:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2176. [2021-05-03 13:51:39,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.0744827586206895) internal successors, (6687), 2175 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 6687 transitions. [2021-05-03 13:51:39,979 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 6687 transitions. Word has length 21 [2021-05-03 13:51:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:39,980 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 6687 transitions. [2021-05-03 13:51:39,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 6687 transitions. [2021-05-03 13:51:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:39,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:39,982 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:40,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:40,182 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1402710911, now seen corresponding path program 169 times [2021-05-03 13:51:40,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:40,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195533921] [2021-05-03 13:51:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:40,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195533921] [2021-05-03 13:51:40,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260820748] [2021-05-03 13:51:40,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:40,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:40,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:40,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:40,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492100261] [2021-05-03 13:51:40,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:40,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:40,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:40,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:40,484 INFO L87 Difference]: Start difference. First operand 2176 states and 6687 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:40,819 INFO L93 Difference]: Finished difference Result 2405 states and 7080 transitions. [2021-05-03 13:51:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:40,822 INFO L225 Difference]: With dead ends: 2405 [2021-05-03 13:51:40,822 INFO L226 Difference]: Without dead ends: 2383 [2021-05-03 13:51:40,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-05-03 13:51:40,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2168. [2021-05-03 13:51:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-05-03 13:51:40,847 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-05-03 13:51:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:40,847 INFO L480 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-05-03 13:51:40,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-05-03 13:51:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:40,849 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:40,849 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:41,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:41,050 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1369111683, now seen corresponding path program 170 times [2021-05-03 13:51:41,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:41,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890619254] [2021-05-03 13:51:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:41,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890619254] [2021-05-03 13:51:41,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136098129] [2021-05-03 13:51:41,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:41,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:41,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:41,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:41,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:41,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844483881] [2021-05-03 13:51:41,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:41,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:41,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:41,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:41,468 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:41,756 INFO L93 Difference]: Finished difference Result 2338 states and 6943 transitions. [2021-05-03 13:51:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:41,759 INFO L225 Difference]: With dead ends: 2338 [2021-05-03 13:51:41,759 INFO L226 Difference]: Without dead ends: 2331 [2021-05-03 13:51:41,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:41,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-05-03 13:51:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2168. [2021-05-03 13:51:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.0724503922473465) internal successors, (6658), 2167 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 6658 transitions. [2021-05-03 13:51:41,787 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 6658 transitions. Word has length 21 [2021-05-03 13:51:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:41,787 INFO L480 AbstractCegarLoop]: Abstraction has 2168 states and 6658 transitions. [2021-05-03 13:51:41,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 6658 transitions. [2021-05-03 13:51:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:41,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:41,789 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:41,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:41,990 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1898222891, now seen corresponding path program 171 times [2021-05-03 13:51:41,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:41,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581941120] [2021-05-03 13:51:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:42,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:42,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581941120] [2021-05-03 13:51:42,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388016825] [2021-05-03 13:51:42,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:42,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:42,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:42,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737069886] [2021-05-03 13:51:42,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:42,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:42,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:42,275 INFO L87 Difference]: Start difference. First operand 2168 states and 6658 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:42,485 INFO L93 Difference]: Finished difference Result 2327 states and 6929 transitions. [2021-05-03 13:51:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:51:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:42,488 INFO L225 Difference]: With dead ends: 2327 [2021-05-03 13:51:42,488 INFO L226 Difference]: Without dead ends: 2314 [2021-05-03 13:51:42,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-05-03 13:51:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2158. [2021-05-03 13:51:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.0686138154844693) internal successors, (6619), 2157 states have internal predecessors, (6619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 6619 transitions. [2021-05-03 13:51:42,521 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 6619 transitions. Word has length 21 [2021-05-03 13:51:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:42,521 INFO L480 AbstractCegarLoop]: Abstraction has 2158 states and 6619 transitions. [2021-05-03 13:51:42,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 6619 transitions. [2021-05-03 13:51:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:42,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:42,523 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:42,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-05-03 13:51:42,723 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1835759173, now seen corresponding path program 172 times [2021-05-03 13:51:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:42,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749532277] [2021-05-03 13:51:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749532277] [2021-05-03 13:51:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377112043] [2021-05-03 13:51:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:42,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:42,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:43,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:43,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-05-03 13:51:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978929535] [2021-05-03 13:51:43,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:43,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:43,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:43,036 INFO L87 Difference]: Start difference. First operand 2158 states and 6619 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:43,366 INFO L93 Difference]: Finished difference Result 2518 states and 7412 transitions. [2021-05-03 13:51:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:43,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:43,369 INFO L225 Difference]: With dead ends: 2518 [2021-05-03 13:51:43,369 INFO L226 Difference]: Without dead ends: 2501 [2021-05-03 13:51:43,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-05-03 13:51:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2261. [2021-05-03 13:51:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 3.084070796460177) internal successors, (6970), 2260 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 6970 transitions. [2021-05-03 13:51:43,396 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 6970 transitions. Word has length 21 [2021-05-03 13:51:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:43,396 INFO L480 AbstractCegarLoop]: Abstraction has 2261 states and 6970 transitions. [2021-05-03 13:51:43,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 6970 transitions. [2021-05-03 13:51:43,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:43,399 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:43,399 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:43,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-05-03 13:51:43,601 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -221056449, now seen corresponding path program 173 times [2021-05-03 13:51:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:43,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508679012] [2021-05-03 13:51:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:43,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508679012] [2021-05-03 13:51:43,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541919587] [2021-05-03 13:51:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:43,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:43,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:43,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:43,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-05-03 13:51:43,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126426229] [2021-05-03 13:51:43,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:51:43,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:43,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:51:43,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:43,947 INFO L87 Difference]: Start difference. First operand 2261 states and 6970 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:44,212 INFO L93 Difference]: Finished difference Result 2516 states and 7381 transitions. [2021-05-03 13:51:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:44,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:44,216 INFO L225 Difference]: With dead ends: 2516 [2021-05-03 13:51:44,216 INFO L226 Difference]: Without dead ends: 2498 [2021-05-03 13:51:44,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-05-03 13:51:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2230. [2021-05-03 13:51:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.0744728577837597) internal successors, (6853), 2229 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 6853 transitions. [2021-05-03 13:51:44,241 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 6853 transitions. Word has length 21 [2021-05-03 13:51:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:44,241 INFO L480 AbstractCegarLoop]: Abstraction has 2230 states and 6853 transitions. [2021-05-03 13:51:44,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 6853 transitions. [2021-05-03 13:51:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:44,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:44,243 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:44,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:44,444 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1994617019, now seen corresponding path program 174 times [2021-05-03 13:51:44,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:44,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969043829] [2021-05-03 13:51:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:44,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969043829] [2021-05-03 13:51:44,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240886459] [2021-05-03 13:51:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:44,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:44,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:44,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:44,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:44,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:51:44,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611660010] [2021-05-03 13:51:44,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:44,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:44,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:44,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:44,716 INFO L87 Difference]: Start difference. First operand 2230 states and 6853 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:45,066 INFO L93 Difference]: Finished difference Result 2507 states and 7296 transitions. [2021-05-03 13:51:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:45,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:45,070 INFO L225 Difference]: With dead ends: 2507 [2021-05-03 13:51:45,070 INFO L226 Difference]: Without dead ends: 2485 [2021-05-03 13:51:45,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-05-03 13:51:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2217. [2021-05-03 13:51:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 3.0699458483754514) internal successors, (6803), 2216 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6803 transitions. [2021-05-03 13:51:45,112 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6803 transitions. Word has length 21 [2021-05-03 13:51:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:45,112 INFO L480 AbstractCegarLoop]: Abstraction has 2217 states and 6803 transitions. [2021-05-03 13:51:45,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6803 transitions. [2021-05-03 13:51:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:45,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:45,114 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:45,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-05-03 13:51:45,315 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:45,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1961017791, now seen corresponding path program 175 times [2021-05-03 13:51:45,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:45,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472046849] [2021-05-03 13:51:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:45,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472046849] [2021-05-03 13:51:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465056177] [2021-05-03 13:51:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:45,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:45,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:51:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197378743] [2021-05-03 13:51:45,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:45,623 INFO L87 Difference]: Start difference. First operand 2217 states and 6803 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:46,019 INFO L93 Difference]: Finished difference Result 2454 states and 7183 transitions. [2021-05-03 13:51:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:51:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:46,022 INFO L225 Difference]: With dead ends: 2454 [2021-05-03 13:51:46,023 INFO L226 Difference]: Without dead ends: 2428 [2021-05-03 13:51:46,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-05-03 13:51:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2206. [2021-05-03 13:51:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.068934240362812) internal successors, (6767), 2205 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6767 transitions. [2021-05-03 13:51:46,046 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6767 transitions. Word has length 21 [2021-05-03 13:51:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:46,046 INFO L480 AbstractCegarLoop]: Abstraction has 2206 states and 6767 transitions. [2021-05-03 13:51:46,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6767 transitions. [2021-05-03 13:51:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:46,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:46,049 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:46,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-05-03 13:51:46,249 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 919441723, now seen corresponding path program 176 times [2021-05-03 13:51:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:46,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40372325] [2021-05-03 13:51:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40372325] [2021-05-03 13:51:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065178231] [2021-05-03 13:51:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:46,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:46,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:46,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:46,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:51:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715634063] [2021-05-03 13:51:46,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:46,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:46,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:46,542 INFO L87 Difference]: Start difference. First operand 2206 states and 6767 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:46,911 INFO L93 Difference]: Finished difference Result 2375 states and 7031 transitions. [2021-05-03 13:51:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:46,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:46,915 INFO L225 Difference]: With dead ends: 2375 [2021-05-03 13:51:46,915 INFO L226 Difference]: Without dead ends: 2368 [2021-05-03 13:51:46,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-05-03 13:51:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2208. [2021-05-03 13:51:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 3.067512460353421) internal successors, (6770), 2207 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6770 transitions. [2021-05-03 13:51:46,940 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6770 transitions. Word has length 21 [2021-05-03 13:51:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:46,940 INFO L480 AbstractCegarLoop]: Abstraction has 2208 states and 6770 transitions. [2021-05-03 13:51:46,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6770 transitions. [2021-05-03 13:51:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:46,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:46,942 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:47,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:47,143 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash -420518503, now seen corresponding path program 177 times [2021-05-03 13:51:47,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:47,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107555775] [2021-05-03 13:51:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:47,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107555775] [2021-05-03 13:51:47,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861418170] [2021-05-03 13:51:47,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:47,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:47,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:47,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375059502] [2021-05-03 13:51:47,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:47,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:47,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:47,516 INFO L87 Difference]: Start difference. First operand 2208 states and 6770 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:47,764 INFO L93 Difference]: Finished difference Result 2298 states and 6916 transitions. [2021-05-03 13:51:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:51:47,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:47,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:47,767 INFO L225 Difference]: With dead ends: 2298 [2021-05-03 13:51:47,767 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 13:51:47,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 13:51:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2196. [2021-05-03 13:51:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.0674259681093394) internal successors, (6733), 2195 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6733 transitions. [2021-05-03 13:51:47,791 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6733 transitions. Word has length 21 [2021-05-03 13:51:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:47,792 INFO L480 AbstractCegarLoop]: Abstraction has 2196 states and 6733 transitions. [2021-05-03 13:51:47,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6733 transitions. [2021-05-03 13:51:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:47,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:47,794 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:47,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:47,995 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:47,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:47,995 INFO L82 PathProgramCache]: Analyzing trace with hash -666539009, now seen corresponding path program 178 times [2021-05-03 13:51:47,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:47,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589284668] [2021-05-03 13:51:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589284668] [2021-05-03 13:51:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197244680] [2021-05-03 13:51:48,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:48,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:48,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:48,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:48,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:48,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:48,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768526942] [2021-05-03 13:51:48,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:48,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:48,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:48,314 INFO L87 Difference]: Start difference. First operand 2196 states and 6733 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:48,639 INFO L93 Difference]: Finished difference Result 2566 states and 7558 transitions. [2021-05-03 13:51:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:48,642 INFO L225 Difference]: With dead ends: 2566 [2021-05-03 13:51:48,642 INFO L226 Difference]: Without dead ends: 2549 [2021-05-03 13:51:48,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-05-03 13:51:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2334. [2021-05-03 13:51:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.072438919845692) internal successors, (7168), 2333 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7168 transitions. [2021-05-03 13:51:48,666 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7168 transitions. Word has length 21 [2021-05-03 13:51:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:48,667 INFO L480 AbstractCegarLoop]: Abstraction has 2334 states and 7168 transitions. [2021-05-03 13:51:48,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7168 transitions. [2021-05-03 13:51:48,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:48,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:48,669 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:48,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:48,873 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 948163715, now seen corresponding path program 179 times [2021-05-03 13:51:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:48,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377502277] [2021-05-03 13:51:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:49,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377502277] [2021-05-03 13:51:49,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182725047] [2021-05-03 13:51:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:49,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:49,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:49,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:49,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:49,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358039373] [2021-05-03 13:51:49,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:49,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:49,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:49,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:49,250 INFO L87 Difference]: Start difference. First operand 2334 states and 7168 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:49,560 INFO L93 Difference]: Finished difference Result 2564 states and 7531 transitions. [2021-05-03 13:51:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:49,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:49,564 INFO L225 Difference]: With dead ends: 2564 [2021-05-03 13:51:49,564 INFO L226 Difference]: Without dead ends: 2548 [2021-05-03 13:51:49,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-05-03 13:51:49,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 2315. [2021-05-03 13:51:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 3.066983578219533) internal successors, (7097), 2314 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 7097 transitions. [2021-05-03 13:51:49,595 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 7097 transitions. Word has length 21 [2021-05-03 13:51:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:49,595 INFO L480 AbstractCegarLoop]: Abstraction has 2315 states and 7097 transitions. [2021-05-03 13:51:49,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 7097 transitions. [2021-05-03 13:51:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:49,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:49,598 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:49,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-03 13:51:49,798 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:49,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1131130113, now seen corresponding path program 180 times [2021-05-03 13:51:49,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:49,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140080801] [2021-05-03 13:51:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:49,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140080801] [2021-05-03 13:51:49,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678147243] [2021-05-03 13:51:49,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:50,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:50,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:50,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:50,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:50,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392360778] [2021-05-03 13:51:50,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:50,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:50,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:50,181 INFO L87 Difference]: Start difference. First operand 2315 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:50,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:50,544 INFO L93 Difference]: Finished difference Result 2571 states and 7503 transitions. [2021-05-03 13:51:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:51:50,544 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:50,547 INFO L225 Difference]: With dead ends: 2571 [2021-05-03 13:51:50,547 INFO L226 Difference]: Without dead ends: 2553 [2021-05-03 13:51:50,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-05-03 13:51:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2295. [2021-05-03 13:51:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.0610287707061903) internal successors, (7022), 2294 states have internal predecessors, (7022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7022 transitions. [2021-05-03 13:51:50,573 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7022 transitions. Word has length 21 [2021-05-03 13:51:50,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:50,574 INFO L480 AbstractCegarLoop]: Abstraction has 2295 states and 7022 transitions. [2021-05-03 13:51:50,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:50,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7022 transitions. [2021-05-03 13:51:50,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:50,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:50,576 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:50,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-05-03 13:51:50,776 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:50,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1164729341, now seen corresponding path program 181 times [2021-05-03 13:51:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:50,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695647532] [2021-05-03 13:51:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695647532] [2021-05-03 13:51:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318914655] [2021-05-03 13:51:50,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:51,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:51,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:51,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799588140] [2021-05-03 13:51:51,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:51,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:51,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:51,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:51,095 INFO L87 Difference]: Start difference. First operand 2295 states and 7022 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:51,462 INFO L93 Difference]: Finished difference Result 2576 states and 7464 transitions. [2021-05-03 13:51:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:51:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:51,466 INFO L225 Difference]: With dead ends: 2576 [2021-05-03 13:51:51,466 INFO L226 Difference]: Without dead ends: 2556 [2021-05-03 13:51:51,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-03 13:51:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2276. [2021-05-03 13:51:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.0567032967032968) internal successors, (6954), 2275 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 6954 transitions. [2021-05-03 13:51:51,502 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 6954 transitions. Word has length 21 [2021-05-03 13:51:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:51,502 INFO L480 AbstractCegarLoop]: Abstraction has 2276 states and 6954 transitions. [2021-05-03 13:51:51,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 6954 transitions. [2021-05-03 13:51:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:51,504 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:51,504 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:51,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-05-03 13:51:51,705 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2088661887, now seen corresponding path program 182 times [2021-05-03 13:51:51,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:51,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482491212] [2021-05-03 13:51:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:51,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482491212] [2021-05-03 13:51:51,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942457526] [2021-05-03 13:51:51,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:51,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:51,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:51,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:51,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:51,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523366299] [2021-05-03 13:51:51,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:51,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:51,990 INFO L87 Difference]: Start difference. First operand 2276 states and 6954 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:52,415 INFO L93 Difference]: Finished difference Result 2488 states and 7287 transitions. [2021-05-03 13:51:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:51:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:52,419 INFO L225 Difference]: With dead ends: 2488 [2021-05-03 13:51:52,419 INFO L226 Difference]: Without dead ends: 2466 [2021-05-03 13:51:52,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:52,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-05-03 13:51:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2256. [2021-05-03 13:51:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.0594235033259425) internal successors, (6899), 2255 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6899 transitions. [2021-05-03 13:51:52,442 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6899 transitions. Word has length 21 [2021-05-03 13:51:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:52,442 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 6899 transitions. [2021-05-03 13:51:52,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6899 transitions. [2021-05-03 13:51:52,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:52,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:52,444 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:52,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-03 13:51:52,645 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -135425149, now seen corresponding path program 183 times [2021-05-03 13:51:52,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:52,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594152596] [2021-05-03 13:51:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594152596] [2021-05-03 13:51:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686400114] [2021-05-03 13:51:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:52,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:52,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:52,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:52,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:52,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:52,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-05-03 13:51:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820981420] [2021-05-03 13:51:52,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:52,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:52,939 INFO L87 Difference]: Start difference. First operand 2256 states and 6899 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:53,349 INFO L93 Difference]: Finished difference Result 2408 states and 7132 transitions. [2021-05-03 13:51:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:51:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:53,352 INFO L225 Difference]: With dead ends: 2408 [2021-05-03 13:51:53,352 INFO L226 Difference]: Without dead ends: 2401 [2021-05-03 13:51:53,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:53,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-05-03 13:51:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2266. [2021-05-03 13:51:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 3.0525386313465783) internal successors, (6914), 2265 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 6914 transitions. [2021-05-03 13:51:53,377 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 6914 transitions. Word has length 21 [2021-05-03 13:51:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:53,377 INFO L480 AbstractCegarLoop]: Abstraction has 2266 states and 6914 transitions. [2021-05-03 13:51:53,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 6914 transitions. [2021-05-03 13:51:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:53,379 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:53,379 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:53,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:53,580 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1867189759, now seen corresponding path program 184 times [2021-05-03 13:51:53,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:53,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519502176] [2021-05-03 13:51:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519502176] [2021-05-03 13:51:53,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282546993] [2021-05-03 13:51:53,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:53,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:53,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:53,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:53,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:53,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:53,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929910424] [2021-05-03 13:51:53,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:53,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:53,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:53,888 INFO L87 Difference]: Start difference. First operand 2266 states and 6914 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:54,122 INFO L93 Difference]: Finished difference Result 2482 states and 7361 transitions. [2021-05-03 13:51:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:54,126 INFO L225 Difference]: With dead ends: 2482 [2021-05-03 13:51:54,126 INFO L226 Difference]: Without dead ends: 2472 [2021-05-03 13:51:54,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-05-03 13:51:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2293. [2021-05-03 13:51:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 3.0584642233856894) internal successors, (7010), 2292 states have internal predecessors, (7010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 7010 transitions. [2021-05-03 13:51:54,152 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 7010 transitions. Word has length 21 [2021-05-03 13:51:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:54,152 INFO L480 AbstractCegarLoop]: Abstraction has 2293 states and 7010 transitions. [2021-05-03 13:51:54,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 7010 transitions. [2021-05-03 13:51:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:54,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:54,154 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:54,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:54,355 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:54,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:54,355 INFO L82 PathProgramCache]: Analyzing trace with hash -813074813, now seen corresponding path program 185 times [2021-05-03 13:51:54,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:54,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725643866] [2021-05-03 13:51:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:54,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725643866] [2021-05-03 13:51:54,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031858857] [2021-05-03 13:51:54,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:54,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:51:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:54,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:54,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:54,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399056111] [2021-05-03 13:51:54,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:54,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:54,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:54,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:54,702 INFO L87 Difference]: Start difference. First operand 2293 states and 7010 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:54,937 INFO L93 Difference]: Finished difference Result 2464 states and 7323 transitions. [2021-05-03 13:51:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:54,941 INFO L225 Difference]: With dead ends: 2464 [2021-05-03 13:51:54,941 INFO L226 Difference]: Without dead ends: 2457 [2021-05-03 13:51:54,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-05-03 13:51:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2291. [2021-05-03 13:51:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.05764192139738) internal successors, (7002), 2290 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 7002 transitions. [2021-05-03 13:51:54,970 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 7002 transitions. Word has length 21 [2021-05-03 13:51:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:54,970 INFO L480 AbstractCegarLoop]: Abstraction has 2291 states and 7002 transitions. [2021-05-03 13:51:54,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 7002 transitions. [2021-05-03 13:51:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:54,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:54,973 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:55,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable342,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:55,174 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1856322731, now seen corresponding path program 186 times [2021-05-03 13:51:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:55,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456609752] [2021-05-03 13:51:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456609752] [2021-05-03 13:51:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309513757] [2021-05-03 13:51:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:55,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:51:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:55,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:55,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2021-05-03 13:51:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950886042] [2021-05-03 13:51:55,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:55,471 INFO L87 Difference]: Start difference. First operand 2291 states and 7002 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:55,677 INFO L93 Difference]: Finished difference Result 2417 states and 7217 transitions. [2021-05-03 13:51:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:55,681 INFO L225 Difference]: With dead ends: 2417 [2021-05-03 13:51:55,681 INFO L226 Difference]: Without dead ends: 2410 [2021-05-03 13:51:55,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-05-03 13:51:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2290. [2021-05-03 13:51:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 3.0576671035386633) internal successors, (6999), 2289 states have internal predecessors, (6999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6999 transitions. [2021-05-03 13:51:55,706 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6999 transitions. Word has length 21 [2021-05-03 13:51:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:55,706 INFO L480 AbstractCegarLoop]: Abstraction has 2290 states and 6999 transitions. [2021-05-03 13:51:55,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6999 transitions. [2021-05-03 13:51:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:55,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:55,708 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:55,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-03 13:51:55,909 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1191597057, now seen corresponding path program 187 times [2021-05-03 13:51:55,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:55,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752265638] [2021-05-03 13:51:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:56,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752265638] [2021-05-03 13:51:56,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777611548] [2021-05-03 13:51:56,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:56,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:56,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:56,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246874976] [2021-05-03 13:51:56,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:56,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:56,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:56,226 INFO L87 Difference]: Start difference. First operand 2290 states and 6999 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:56,460 INFO L93 Difference]: Finished difference Result 2563 states and 7583 transitions. [2021-05-03 13:51:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:51:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:56,464 INFO L225 Difference]: With dead ends: 2563 [2021-05-03 13:51:56,464 INFO L226 Difference]: Without dead ends: 2553 [2021-05-03 13:51:56,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-05-03 13:51:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2331. [2021-05-03 13:51:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.06480686695279) internal successors, (7141), 2330 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 7141 transitions. [2021-05-03 13:51:56,491 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 7141 transitions. Word has length 21 [2021-05-03 13:51:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:56,491 INFO L480 AbstractCegarLoop]: Abstraction has 2331 states and 7141 transitions. [2021-05-03 13:51:56,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 7141 transitions. [2021-05-03 13:51:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:56,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:56,494 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:56,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-05-03 13:51:56,694 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 423105667, now seen corresponding path program 188 times [2021-05-03 13:51:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281521236] [2021-05-03 13:51:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281521236] [2021-05-03 13:51:56,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471431984] [2021-05-03 13:51:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:56,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:56,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:57,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:57,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:57,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817651464] [2021-05-03 13:51:57,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:57,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:57,005 INFO L87 Difference]: Start difference. First operand 2331 states and 7141 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:57,290 INFO L93 Difference]: Finished difference Result 2544 states and 7541 transitions. [2021-05-03 13:51:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:51:57,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:57,294 INFO L225 Difference]: With dead ends: 2544 [2021-05-03 13:51:57,294 INFO L226 Difference]: Without dead ends: 2537 [2021-05-03 13:51:57,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:51:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-05-03 13:51:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2328. [2021-05-03 13:51:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.063601203266008) internal successors, (7129), 2327 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7129 transitions. [2021-05-03 13:51:57,319 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7129 transitions. Word has length 21 [2021-05-03 13:51:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:57,319 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 7129 transitions. [2021-05-03 13:51:57,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7129 transitions. [2021-05-03 13:51:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:57,321 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:57,322 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:57,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:57,522 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash -620142251, now seen corresponding path program 189 times [2021-05-03 13:51:57,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:57,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880591521] [2021-05-03 13:51:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880591521] [2021-05-03 13:51:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363774333] [2021-05-03 13:51:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:57,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:51:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:57,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:57,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:57,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:57,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200934644] [2021-05-03 13:51:57,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:57,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:57,853 INFO L87 Difference]: Start difference. First operand 2328 states and 7129 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:58,124 INFO L93 Difference]: Finished difference Result 2523 states and 7485 transitions. [2021-05-03 13:51:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:58,128 INFO L225 Difference]: With dead ends: 2523 [2021-05-03 13:51:58,128 INFO L226 Difference]: Without dead ends: 2510 [2021-05-03 13:51:58,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-05-03 13:51:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2329. [2021-05-03 13:51:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 3.0614261168384878) internal successors, (7127), 2328 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 7127 transitions. [2021-05-03 13:51:58,155 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 7127 transitions. Word has length 21 [2021-05-03 13:51:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:58,155 INFO L480 AbstractCegarLoop]: Abstraction has 2329 states and 7127 transitions. [2021-05-03 13:51:58,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 7127 transitions. [2021-05-03 13:51:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:58,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:58,157 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:58,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-05-03 13:51:58,358 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -84912449, now seen corresponding path program 190 times [2021-05-03 13:51:58,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:58,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256475560] [2021-05-03 13:51:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:58,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256475560] [2021-05-03 13:51:58,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855673385] [2021-05-03 13:51:58,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:58,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:58,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877338002] [2021-05-03 13:51:58,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:58,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:58,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:58,665 INFO L87 Difference]: Start difference. First operand 2329 states and 7127 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:58,927 INFO L93 Difference]: Finished difference Result 2467 states and 7353 transitions. [2021-05-03 13:51:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:58,931 INFO L225 Difference]: With dead ends: 2467 [2021-05-03 13:51:58,931 INFO L226 Difference]: Without dead ends: 2460 [2021-05-03 13:51:58,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-05-03 13:51:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2327. [2021-05-03 13:51:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 3.0614789337919173) internal successors, (7121), 2326 states have internal predecessors, (7121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 7121 transitions. [2021-05-03 13:51:58,974 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 7121 transitions. Word has length 21 [2021-05-03 13:51:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:58,974 INFO L480 AbstractCegarLoop]: Abstraction has 2327 states and 7121 transitions. [2021-05-03 13:51:58,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 7121 transitions. [2021-05-03 13:51:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:58,976 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:58,976 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:59,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:59,177 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1303821513, now seen corresponding path program 191 times [2021-05-03 13:51:59,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:59,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798344476] [2021-05-03 13:51:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798344476] [2021-05-03 13:51:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474634007] [2021-05-03 13:51:59,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:59,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:59,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:51:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:59,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:59,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-05-03 13:51:59,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480176637] [2021-05-03 13:51:59,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:51:59,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:59,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:51:59,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:51:59,472 INFO L87 Difference]: Start difference. First operand 2327 states and 7121 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:59,721 INFO L93 Difference]: Finished difference Result 2438 states and 7310 transitions. [2021-05-03 13:51:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:51:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:59,725 INFO L225 Difference]: With dead ends: 2438 [2021-05-03 13:51:59,725 INFO L226 Difference]: Without dead ends: 2422 [2021-05-03 13:51:59,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:51:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-05-03 13:51:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2317. [2021-05-03 13:51:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.0617443868739205) internal successors, (7091), 2316 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:59,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7091 transitions. [2021-05-03 13:51:59,749 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7091 transitions. Word has length 21 [2021-05-03 13:51:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:59,749 INFO L480 AbstractCegarLoop]: Abstraction has 2317 states and 7091 transitions. [2021-05-03 13:51:59,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:59,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7091 transitions. [2021-05-03 13:51:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:51:59,752 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:59,752 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:59,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:59,952 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:59,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1524707841, now seen corresponding path program 192 times [2021-05-03 13:51:59,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:59,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942519516] [2021-05-03 13:51:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942519516] [2021-05-03 13:52:00,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589057738] [2021-05-03 13:52:00,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:00,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:52:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:52:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:00,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:00,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:52:00,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599984328] [2021-05-03 13:52:00,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:00,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:00,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:00,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:00,255 INFO L87 Difference]: Start difference. First operand 2317 states and 7091 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:00,485 INFO L93 Difference]: Finished difference Result 2637 states and 7762 transitions. [2021-05-03 13:52:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:52:00,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:52:00,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:00,489 INFO L225 Difference]: With dead ends: 2637 [2021-05-03 13:52:00,489 INFO L226 Difference]: Without dead ends: 2627 [2021-05-03 13:52:00,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:00,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2021-05-03 13:52:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 2365. [2021-05-03 13:52:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.0697969543147208) internal successors, (7257), 2364 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7257 transitions. [2021-05-03 13:52:00,527 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7257 transitions. Word has length 21 [2021-05-03 13:52:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:00,527 INFO L480 AbstractCegarLoop]: Abstraction has 2365 states and 7257 transitions. [2021-05-03 13:52:00,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7257 transitions. [2021-05-03 13:52:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:52:00,529 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:00,529 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:00,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:00,730 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:00,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash 89994883, now seen corresponding path program 193 times [2021-05-03 13:52:00,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:00,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575625019] [2021-05-03 13:52:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575625019] [2021-05-03 13:52:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320650694] [2021-05-03 13:52:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:52:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:01,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:01,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:52:01,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385007526] [2021-05-03 13:52:01,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:01,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:01,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:01,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:01,009 INFO L87 Difference]: Start difference. First operand 2365 states and 7257 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:01,246 INFO L93 Difference]: Finished difference Result 2621 states and 7728 transitions. [2021-05-03 13:52:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:52:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:52:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:01,250 INFO L225 Difference]: With dead ends: 2621 [2021-05-03 13:52:01,250 INFO L226 Difference]: Without dead ends: 2614 [2021-05-03 13:52:01,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-05-03 13:52:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2358. [2021-05-03 13:52:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.068731438268986) internal successors, (7233), 2357 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 7233 transitions. [2021-05-03 13:52:01,275 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 7233 transitions. Word has length 21 [2021-05-03 13:52:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:01,275 INFO L480 AbstractCegarLoop]: Abstraction has 2358 states and 7233 transitions. [2021-05-03 13:52:01,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 7233 transitions. [2021-05-03 13:52:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:52:01,277 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:01,277 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:01,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-03 13:52:01,478 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash -953253035, now seen corresponding path program 194 times [2021-05-03 13:52:01,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:01,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516490572] [2021-05-03 13:52:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:01,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516490572] [2021-05-03 13:52:01,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316508859] [2021-05-03 13:52:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:01,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:52:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:01,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:01,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:52:01,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492955874] [2021-05-03 13:52:01,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:01,763 INFO L87 Difference]: Start difference. First operand 2358 states and 7233 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:02,013 INFO L93 Difference]: Finished difference Result 2635 states and 7737 transitions. [2021-05-03 13:52:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:52:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:52:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:02,017 INFO L225 Difference]: With dead ends: 2635 [2021-05-03 13:52:02,017 INFO L226 Difference]: Without dead ends: 2622 [2021-05-03 13:52:02,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-05-03 13:52:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 2355. [2021-05-03 13:52:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.0671197960917587) internal successors, (7220), 2354 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7220 transitions. [2021-05-03 13:52:02,052 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7220 transitions. Word has length 21 [2021-05-03 13:52:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:02,052 INFO L480 AbstractCegarLoop]: Abstraction has 2355 states and 7220 transitions. [2021-05-03 13:52:02,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7220 transitions. [2021-05-03 13:52:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:52:02,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:02,055 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:02,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-05-03 13:52:02,255 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -418023233, now seen corresponding path program 195 times [2021-05-03 13:52:02,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:02,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435324973] [2021-05-03 13:52:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435324973] [2021-05-03 13:52:02,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903944238] [2021-05-03 13:52:02,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:02,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:52:02,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:52:02,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:02,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:02,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:52:02,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837272653] [2021-05-03 13:52:02,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:02,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:02,531 INFO L87 Difference]: Start difference. First operand 2355 states and 7220 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:02,856 INFO L93 Difference]: Finished difference Result 2598 states and 7655 transitions. [2021-05-03 13:52:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:52:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:52:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:02,860 INFO L225 Difference]: With dead ends: 2598 [2021-05-03 13:52:02,860 INFO L226 Difference]: Without dead ends: 2582 [2021-05-03 13:52:02,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-05-03 13:52:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2352. [2021-05-03 13:52:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.0659293917481922) internal successors, (7208), 2351 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 7208 transitions. [2021-05-03 13:52:02,888 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 7208 transitions. Word has length 21 [2021-05-03 13:52:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:02,888 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 7208 transitions. [2021-05-03 13:52:02,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 7208 transitions. [2021-05-03 13:52:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 13:52:02,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:02,891 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:03,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:03,091 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1005768555, now seen corresponding path program 196 times [2021-05-03 13:52:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:03,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781859235] [2021-05-03 13:52:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:03,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781859235] [2021-05-03 13:52:03,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036870161] [2021-05-03 13:52:03,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:03,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:03,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 13:52:03,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:03,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:03,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-05-03 13:52:03,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008124218] [2021-05-03 13:52:03,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:03,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:03,372 INFO L87 Difference]: Start difference. First operand 2352 states and 7208 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:03,715 INFO L93 Difference]: Finished difference Result 2537 states and 7524 transitions. [2021-05-03 13:52:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:52:03,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 13:52:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:03,718 INFO L225 Difference]: With dead ends: 2537 [2021-05-03 13:52:03,718 INFO L226 Difference]: Without dead ends: 2530 [2021-05-03 13:52:03,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-05-03 13:52:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2349. [2021-05-03 13:52:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 3.066013628620102) internal successors, (7199), 2348 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 7199 transitions. [2021-05-03 13:52:03,746 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 7199 transitions. Word has length 21 [2021-05-03 13:52:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:03,747 INFO L480 AbstractCegarLoop]: Abstraction has 2349 states and 7199 transitions. [2021-05-03 13:52:03,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 7199 transitions. [2021-05-03 13:52:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:03,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:03,749 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:03,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-05-03 13:52:03,950 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash 622856203, now seen corresponding path program 197 times [2021-05-03 13:52:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:03,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019113954] [2021-05-03 13:52:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:04,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019113954] [2021-05-03 13:52:04,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590451802] [2021-05-03 13:52:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:04,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:52:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:04,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:04,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-05-03 13:52:04,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120737659] [2021-05-03 13:52:04,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:52:04,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:52:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:52:04,153 INFO L87 Difference]: Start difference. First operand 2349 states and 7199 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:04,315 INFO L93 Difference]: Finished difference Result 3357 states and 10057 transitions. [2021-05-03 13:52:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:52:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:04,319 INFO L225 Difference]: With dead ends: 3357 [2021-05-03 13:52:04,319 INFO L226 Difference]: Without dead ends: 3337 [2021-05-03 13:52:04,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:52:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3337 states. [2021-05-03 13:52:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3337 to 2344. [2021-05-03 13:52:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.0682885189927442) internal successors, (7189), 2343 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 7189 transitions. [2021-05-03 13:52:04,350 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 7189 transitions. Word has length 22 [2021-05-03 13:52:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:04,350 INFO L480 AbstractCegarLoop]: Abstraction has 2344 states and 7189 transitions. [2021-05-03 13:52:04,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 7189 transitions. [2021-05-03 13:52:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:04,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:04,352 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:04,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-05-03 13:52:04,553 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1555322853, now seen corresponding path program 198 times [2021-05-03 13:52:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716952090] [2021-05-03 13:52:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716952090] [2021-05-03 13:52:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205411534] [2021-05-03 13:52:04,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:04,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:52:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:04,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:04,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-05-03 13:52:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572073433] [2021-05-03 13:52:04,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:52:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:52:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:52:04,733 INFO L87 Difference]: Start difference. First operand 2344 states and 7189 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:04,891 INFO L93 Difference]: Finished difference Result 3420 states and 10250 transitions. [2021-05-03 13:52:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:52:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:04,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:04,895 INFO L225 Difference]: With dead ends: 3420 [2021-05-03 13:52:04,895 INFO L226 Difference]: Without dead ends: 3420 [2021-05-03 13:52:04,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:52:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-05-03 13:52:04,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2388. [2021-05-03 13:52:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.0670297444490995) internal successors, (7321), 2387 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7321 transitions. [2021-05-03 13:52:04,949 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7321 transitions. Word has length 22 [2021-05-03 13:52:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:04,949 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 7321 transitions. [2021-05-03 13:52:04,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7321 transitions. [2021-05-03 13:52:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:04,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:04,951 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:05,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-05-03 13:52:05,152 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -167346353, now seen corresponding path program 199 times [2021-05-03 13:52:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:05,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334370094] [2021-05-03 13:52:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334370094] [2021-05-03 13:52:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553792615] [2021-05-03 13:52:05,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:05,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:05,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:05,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:05,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605206840] [2021-05-03 13:52:05,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:05,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:05,361 INFO L87 Difference]: Start difference. First operand 2388 states and 7321 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:06,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:06,068 INFO L93 Difference]: Finished difference Result 4110 states and 12006 transitions. [2021-05-03 13:52:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:52:06,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:06,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:06,074 INFO L225 Difference]: With dead ends: 4110 [2021-05-03 13:52:06,074 INFO L226 Difference]: Without dead ends: 4102 [2021-05-03 13:52:06,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:52:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-05-03 13:52:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 2823. [2021-05-03 13:52:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2823 states, 2822 states have (on average 3.1119773210489017) internal successors, (8782), 2822 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 8782 transitions. [2021-05-03 13:52:06,119 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 8782 transitions. Word has length 22 [2021-05-03 13:52:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:06,119 INFO L480 AbstractCegarLoop]: Abstraction has 2823 states and 8782 transitions. [2021-05-03 13:52:06,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 8782 transitions. [2021-05-03 13:52:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:06,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:06,123 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:06,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:06,323 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash 404108453, now seen corresponding path program 200 times [2021-05-03 13:52:06,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:06,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019280307] [2021-05-03 13:52:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019280307] [2021-05-03 13:52:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315575787] [2021-05-03 13:52:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:06,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:06,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:06,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:06,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:06,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398502947] [2021-05-03 13:52:06,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:06,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:06,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:06,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:06,537 INFO L87 Difference]: Start difference. First operand 2823 states and 8782 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:07,272 INFO L93 Difference]: Finished difference Result 4077 states and 11861 transitions. [2021-05-03 13:52:07,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 13:52:07,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:07,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:07,277 INFO L225 Difference]: With dead ends: 4077 [2021-05-03 13:52:07,278 INFO L226 Difference]: Without dead ends: 4071 [2021-05-03 13:52:07,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 13:52:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-05-03 13:52:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2645. [2021-05-03 13:52:07,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.0726172465960664) internal successors, (8124), 2644 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 8124 transitions. [2021-05-03 13:52:07,320 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 8124 transitions. Word has length 22 [2021-05-03 13:52:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:07,320 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 8124 transitions. [2021-05-03 13:52:07,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 8124 transitions. [2021-05-03 13:52:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:07,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:07,324 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:07,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:07,524 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1527463093, now seen corresponding path program 201 times [2021-05-03 13:52:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:07,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961442518] [2021-05-03 13:52:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:07,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961442518] [2021-05-03 13:52:07,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132980872] [2021-05-03 13:52:07,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:52:07,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:07,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:07,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:07,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703251384] [2021-05-03 13:52:07,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:07,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:07,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:07,773 INFO L87 Difference]: Start difference. First operand 2645 states and 8124 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:08,517 INFO L93 Difference]: Finished difference Result 3589 states and 10404 transitions. [2021-05-03 13:52:08,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:52:08,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:08,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:08,521 INFO L225 Difference]: With dead ends: 3589 [2021-05-03 13:52:08,521 INFO L226 Difference]: Without dead ends: 3589 [2021-05-03 13:52:08,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 13:52:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-05-03 13:52:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2809. [2021-05-03 13:52:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2809 states, 2808 states have (on average 3.094017094017094) internal successors, (8688), 2808 states have internal predecessors, (8688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 8688 transitions. [2021-05-03 13:52:08,559 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 8688 transitions. Word has length 22 [2021-05-03 13:52:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:08,559 INFO L480 AbstractCegarLoop]: Abstraction has 2809 states and 8688 transitions. [2021-05-03 13:52:08,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 8688 transitions. [2021-05-03 13:52:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:08,561 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:08,561 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:08,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:08,762 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1992054197, now seen corresponding path program 202 times [2021-05-03 13:52:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:08,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555591160] [2021-05-03 13:52:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555591160] [2021-05-03 13:52:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640634880] [2021-05-03 13:52:08,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:08,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:08,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:08,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:08,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:08,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405729766] [2021-05-03 13:52:08,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:08,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:08,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:08,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:08,973 INFO L87 Difference]: Start difference. First operand 2809 states and 8688 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:09,710 INFO L93 Difference]: Finished difference Result 3314 states and 9794 transitions. [2021-05-03 13:52:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:52:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:09,715 INFO L225 Difference]: With dead ends: 3314 [2021-05-03 13:52:09,715 INFO L226 Difference]: Without dead ends: 3310 [2021-05-03 13:52:09,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 649.3ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 13:52:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-05-03 13:52:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2519. [2021-05-03 13:52:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 3.0532168387609215) internal successors, (7688), 2518 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 7688 transitions. [2021-05-03 13:52:09,746 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 7688 transitions. Word has length 22 [2021-05-03 13:52:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:09,746 INFO L480 AbstractCegarLoop]: Abstraction has 2519 states and 7688 transitions. [2021-05-03 13:52:09,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 7688 transitions. [2021-05-03 13:52:09,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:09,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:09,748 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:09,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:09,949 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash 939338255, now seen corresponding path program 203 times [2021-05-03 13:52:09,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:09,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528357398] [2021-05-03 13:52:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528357398] [2021-05-03 13:52:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978106555] [2021-05-03 13:52:10,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:10,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:52:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:10,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:10,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549885035] [2021-05-03 13:52:10,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:10,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:10,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:10,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:10,162 INFO L87 Difference]: Start difference. First operand 2519 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:10,804 INFO L93 Difference]: Finished difference Result 3834 states and 11012 transitions. [2021-05-03 13:52:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 13:52:10,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:10,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:10,809 INFO L225 Difference]: With dead ends: 3834 [2021-05-03 13:52:10,809 INFO L226 Difference]: Without dead ends: 3825 [2021-05-03 13:52:10,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 549.6ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 13:52:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-05-03 13:52:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 2573. [2021-05-03 13:52:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.0544323483670297) internal successors, (7856), 2572 states have internal predecessors, (7856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7856 transitions. [2021-05-03 13:52:10,843 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7856 transitions. Word has length 22 [2021-05-03 13:52:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:10,843 INFO L480 AbstractCegarLoop]: Abstraction has 2573 states and 7856 transitions. [2021-05-03 13:52:10,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7856 transitions. [2021-05-03 13:52:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:10,845 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:10,845 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:11,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-05-03 13:52:11,046 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 351592933, now seen corresponding path program 204 times [2021-05-03 13:52:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:11,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884989449] [2021-05-03 13:52:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884989449] [2021-05-03 13:52:11,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289814200] [2021-05-03 13:52:11,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:11,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:52:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:11,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:11,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:11,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330602587] [2021-05-03 13:52:11,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:11,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:11,244 INFO L87 Difference]: Start difference. First operand 2573 states and 7856 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:11,834 INFO L93 Difference]: Finished difference Result 3887 states and 11211 transitions. [2021-05-03 13:52:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 13:52:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:11,840 INFO L225 Difference]: With dead ends: 3887 [2021-05-03 13:52:11,840 INFO L226 Difference]: Without dead ends: 3875 [2021-05-03 13:52:11,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:52:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-05-03 13:52:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 2597. [2021-05-03 13:52:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 3.0543143297380584) internal successors, (7929), 2596 states have internal predecessors, (7929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 7929 transitions. [2021-05-03 13:52:11,875 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 7929 transitions. Word has length 22 [2021-05-03 13:52:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:11,875 INFO L480 AbstractCegarLoop]: Abstraction has 2597 states and 7929 transitions. [2021-05-03 13:52:11,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 7929 transitions. [2021-05-03 13:52:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:11,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:11,878 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:12,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:12,078 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -688642865, now seen corresponding path program 205 times [2021-05-03 13:52:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:12,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639920414] [2021-05-03 13:52:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:12,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639920414] [2021-05-03 13:52:12,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719490241] [2021-05-03 13:52:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004386464] [2021-05-03 13:52:12,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:12,302 INFO L87 Difference]: Start difference. First operand 2597 states and 7929 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:12,836 INFO L93 Difference]: Finished difference Result 3976 states and 11538 transitions. [2021-05-03 13:52:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:52:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:12,841 INFO L225 Difference]: With dead ends: 3976 [2021-05-03 13:52:12,841 INFO L226 Difference]: Without dead ends: 3961 [2021-05-03 13:52:12,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:52:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2021-05-03 13:52:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 2615. [2021-05-03 13:52:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0478194338179034) internal successors, (7967), 2614 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7967 transitions. [2021-05-03 13:52:12,883 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7967 transitions. Word has length 22 [2021-05-03 13:52:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:12,883 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 7967 transitions. [2021-05-03 13:52:12,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7967 transitions. [2021-05-03 13:52:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:12,886 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:12,886 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:13,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-05-03 13:52:13,086 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1423785765, now seen corresponding path program 206 times [2021-05-03 13:52:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:13,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444488691] [2021-05-03 13:52:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444488691] [2021-05-03 13:52:13,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135519867] [2021-05-03 13:52:13,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:13,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:13,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:13,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:13,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436316397] [2021-05-03 13:52:13,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:13,299 INFO L87 Difference]: Start difference. First operand 2615 states and 7967 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:13,681 INFO L93 Difference]: Finished difference Result 3613 states and 10545 transitions. [2021-05-03 13:52:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:52:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:13,686 INFO L225 Difference]: With dead ends: 3613 [2021-05-03 13:52:13,687 INFO L226 Difference]: Without dead ends: 3598 [2021-05-03 13:52:13,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 13:52:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-05-03 13:52:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2615. [2021-05-03 13:52:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 3.0459066564651875) internal successors, (7962), 2614 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7962 transitions. [2021-05-03 13:52:13,725 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7962 transitions. Word has length 22 [2021-05-03 13:52:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:13,725 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 7962 transitions. [2021-05-03 13:52:13,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7962 transitions. [2021-05-03 13:52:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:13,728 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:13,728 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:13,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-05-03 13:52:13,929 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1262577295, now seen corresponding path program 207 times [2021-05-03 13:52:13,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:13,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587045039] [2021-05-03 13:52:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:14,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587045039] [2021-05-03 13:52:14,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753542073] [2021-05-03 13:52:14,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:14,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:52:14,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:14,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:14,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:14,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:14,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22262110] [2021-05-03 13:52:14,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:14,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:14,152 INFO L87 Difference]: Start difference. First operand 2615 states and 7962 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:14,872 INFO L93 Difference]: Finished difference Result 3520 states and 10061 transitions. [2021-05-03 13:52:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:52:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:14,877 INFO L225 Difference]: With dead ends: 3520 [2021-05-03 13:52:14,877 INFO L226 Difference]: Without dead ends: 3511 [2021-05-03 13:52:14,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 13:52:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-05-03 13:52:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2798. [2021-05-03 13:52:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.068287450840186) internal successors, (8582), 2797 states have internal predecessors, (8582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 8582 transitions. [2021-05-03 13:52:14,927 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 8582 transitions. Word has length 22 [2021-05-03 13:52:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:14,927 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 8582 transitions. [2021-05-03 13:52:14,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 8582 transitions. [2021-05-03 13:52:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:14,929 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:14,929 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:15,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:15,130 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 797986191, now seen corresponding path program 208 times [2021-05-03 13:52:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:15,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643279922] [2021-05-03 13:52:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:15,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643279922] [2021-05-03 13:52:15,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357549890] [2021-05-03 13:52:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:15,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:15,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:15,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:15,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939502517] [2021-05-03 13:52:15,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:15,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:15,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:15,335 INFO L87 Difference]: Start difference. First operand 2798 states and 8582 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:16,235 INFO L93 Difference]: Finished difference Result 3291 states and 9479 transitions. [2021-05-03 13:52:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 13:52:16,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:16,239 INFO L225 Difference]: With dead ends: 3291 [2021-05-03 13:52:16,239 INFO L226 Difference]: Without dead ends: 3283 [2021-05-03 13:52:16,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 13:52:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-05-03 13:52:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2546. [2021-05-03 13:52:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.0369351669941063) internal successors, (7729), 2545 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 7729 transitions. [2021-05-03 13:52:16,272 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 7729 transitions. Word has length 22 [2021-05-03 13:52:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:16,272 INFO L480 AbstractCegarLoop]: Abstraction has 2546 states and 7729 transitions. [2021-05-03 13:52:16,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 7729 transitions. [2021-05-03 13:52:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:16,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:16,274 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:16,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-05-03 13:52:16,475 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 764386963, now seen corresponding path program 209 times [2021-05-03 13:52:16,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:16,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501003646] [2021-05-03 13:52:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:16,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501003646] [2021-05-03 13:52:16,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100202210] [2021-05-03 13:52:16,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:16,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:52:16,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:16,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:16,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:16,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-05-03 13:52:16,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534063216] [2021-05-03 13:52:16,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:52:16,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:52:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:16,722 INFO L87 Difference]: Start difference. First operand 2546 states and 7729 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:17,451 INFO L93 Difference]: Finished difference Result 2975 states and 8569 transitions. [2021-05-03 13:52:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:52:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:17,455 INFO L225 Difference]: With dead ends: 2975 [2021-05-03 13:52:17,456 INFO L226 Difference]: Without dead ends: 2967 [2021-05-03 13:52:17,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:52:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2967 states. [2021-05-03 13:52:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2967 to 2564. [2021-05-03 13:52:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.037846273897776) internal successors, (7786), 2563 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7786 transitions. [2021-05-03 13:52:17,486 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7786 transitions. Word has length 22 [2021-05-03 13:52:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:17,486 INFO L480 AbstractCegarLoop]: Abstraction has 2564 states and 7786 transitions. [2021-05-03 13:52:17,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7786 transitions. [2021-05-03 13:52:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:17,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:17,489 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:17,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:17,689 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1854483403, now seen corresponding path program 210 times [2021-05-03 13:52:17,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880744409] [2021-05-03 13:52:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:17,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880744409] [2021-05-03 13:52:17,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746760549] [2021-05-03 13:52:17,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:17,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:52:17,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:17,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:17,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:17,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:52:17,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169437957] [2021-05-03 13:52:17,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:17,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:17,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:17,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:17,899 INFO L87 Difference]: Start difference. First operand 2564 states and 7786 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:18,589 INFO L93 Difference]: Finished difference Result 3590 states and 10196 transitions. [2021-05-03 13:52:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 13:52:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:18,594 INFO L225 Difference]: With dead ends: 3590 [2021-05-03 13:52:18,594 INFO L226 Difference]: Without dead ends: 3575 [2021-05-03 13:52:18,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:52:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-05-03 13:52:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2746. [2021-05-03 13:52:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 3.0612021857923497) internal successors, (8403), 2745 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 8403 transitions. [2021-05-03 13:52:18,627 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 8403 transitions. Word has length 22 [2021-05-03 13:52:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:18,627 INFO L480 AbstractCegarLoop]: Abstraction has 2746 states and 8403 transitions. [2021-05-03 13:52:18,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 8403 transitions. [2021-05-03 13:52:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:18,630 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:18,630 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:18,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:18,830 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:18,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1389892299, now seen corresponding path program 211 times [2021-05-03 13:52:18,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:18,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126769969] [2021-05-03 13:52:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:18,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126769969] [2021-05-03 13:52:18,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226494654] [2021-05-03 13:52:18,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:18,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:19,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:19,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:52:19,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951895735] [2021-05-03 13:52:19,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:19,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:19,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:19,032 INFO L87 Difference]: Start difference. First operand 2746 states and 8403 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:19,905 INFO L93 Difference]: Finished difference Result 3290 states and 9440 transitions. [2021-05-03 13:52:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:52:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:19,909 INFO L225 Difference]: With dead ends: 3290 [2021-05-03 13:52:19,909 INFO L226 Difference]: Without dead ends: 3284 [2021-05-03 13:52:19,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 779.8ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:52:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2021-05-03 13:52:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 2630. [2021-05-03 13:52:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.0441232407759604) internal successors, (8003), 2629 states have internal predecessors, (8003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 8003 transitions. [2021-05-03 13:52:19,943 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 8003 transitions. Word has length 22 [2021-05-03 13:52:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:19,943 INFO L480 AbstractCegarLoop]: Abstraction has 2630 states and 8003 transitions. [2021-05-03 13:52:19,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 8003 transitions. [2021-05-03 13:52:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:19,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:19,946 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:20,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:20,147 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:20,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:20,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1356293071, now seen corresponding path program 212 times [2021-05-03 13:52:20,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:20,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135205089] [2021-05-03 13:52:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:20,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135205089] [2021-05-03 13:52:20,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910134181] [2021-05-03 13:52:20,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:20,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:20,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:20,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 13:52:20,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975455611] [2021-05-03 13:52:20,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:52:20,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:20,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:52:20,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:20,402 INFO L87 Difference]: Start difference. First operand 2630 states and 8003 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:21,202 INFO L93 Difference]: Finished difference Result 3240 states and 9276 transitions. [2021-05-03 13:52:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 13:52:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:21,206 INFO L225 Difference]: With dead ends: 3240 [2021-05-03 13:52:21,206 INFO L226 Difference]: Without dead ends: 3228 [2021-05-03 13:52:21,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 760.7ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:52:21,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-05-03 13:52:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2594. [2021-05-03 13:52:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 3.048206710374084) internal successors, (7904), 2593 states have internal predecessors, (7904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7904 transitions. [2021-05-03 13:52:21,237 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7904 transitions. Word has length 22 [2021-05-03 13:52:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:21,237 INFO L480 AbstractCegarLoop]: Abstraction has 2594 states and 7904 transitions. [2021-05-03 13:52:21,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7904 transitions. [2021-05-03 13:52:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:21,239 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:21,239 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:21,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:21,440 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash 314717003, now seen corresponding path program 213 times [2021-05-03 13:52:21,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:21,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258731112] [2021-05-03 13:52:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:21,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258731112] [2021-05-03 13:52:21,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391851235] [2021-05-03 13:52:21,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:21,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:21,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:21,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 13:52:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065814639] [2021-05-03 13:52:21,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:21,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:21,678 INFO L87 Difference]: Start difference. First operand 2594 states and 7904 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:22,433 INFO L93 Difference]: Finished difference Result 3083 states and 8911 transitions. [2021-05-03 13:52:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 13:52:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:22,436 INFO L225 Difference]: With dead ends: 3083 [2021-05-03 13:52:22,436 INFO L226 Difference]: Without dead ends: 3071 [2021-05-03 13:52:22,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:52:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-05-03 13:52:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 2614. [2021-05-03 13:52:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.050133945656334) internal successors, (7970), 2613 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 7970 transitions. [2021-05-03 13:52:22,465 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 7970 transitions. Word has length 22 [2021-05-03 13:52:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:22,465 INFO L480 AbstractCegarLoop]: Abstraction has 2614 states and 7970 transitions. [2021-05-03 13:52:22,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 7970 transitions. [2021-05-03 13:52:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:22,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:22,468 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:22,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:22,668 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1271263729, now seen corresponding path program 214 times [2021-05-03 13:52:22,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:22,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665897110] [2021-05-03 13:52:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:22,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665897110] [2021-05-03 13:52:22,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176805060] [2021-05-03 13:52:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:22,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:22,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:22,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:22,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 13:52:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385580278] [2021-05-03 13:52:22,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:22,868 INFO L87 Difference]: Start difference. First operand 2614 states and 7970 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:23,543 INFO L93 Difference]: Finished difference Result 3813 states and 10862 transitions. [2021-05-03 13:52:23,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:52:23,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:23,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:23,548 INFO L225 Difference]: With dead ends: 3813 [2021-05-03 13:52:23,548 INFO L226 Difference]: Without dead ends: 3801 [2021-05-03 13:52:23,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:52:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-05-03 13:52:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 2922. [2021-05-03 13:52:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.0708661417322833) internal successors, (8970), 2921 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 8970 transitions. [2021-05-03 13:52:23,603 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 8970 transitions. Word has length 22 [2021-05-03 13:52:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:23,603 INFO L480 AbstractCegarLoop]: Abstraction has 2922 states and 8970 transitions. [2021-05-03 13:52:23,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 8970 transitions. [2021-05-03 13:52:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:23,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:23,606 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:23,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:23,807 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1735854833, now seen corresponding path program 215 times [2021-05-03 13:52:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:23,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336021853] [2021-05-03 13:52:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336021853] [2021-05-03 13:52:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032891593] [2021-05-03 13:52:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:23,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:52:23,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:23,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:24,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:24,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 13:52:24,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136001909] [2021-05-03 13:52:24,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:24,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:24,014 INFO L87 Difference]: Start difference. First operand 2922 states and 8970 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:24,951 INFO L93 Difference]: Finished difference Result 3570 states and 10279 transitions. [2021-05-03 13:52:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:52:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:24,955 INFO L225 Difference]: With dead ends: 3570 [2021-05-03 13:52:24,955 INFO L226 Difference]: Without dead ends: 3564 [2021-05-03 13:52:24,955 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 853.8ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 13:52:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-05-03 13:52:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2830. [2021-05-03 13:52:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2829 states have (on average 3.0572640509013786) internal successors, (8649), 2829 states have internal predecessors, (8649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 8649 transitions. [2021-05-03 13:52:25,005 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 8649 transitions. Word has length 22 [2021-05-03 13:52:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:25,005 INFO L480 AbstractCegarLoop]: Abstraction has 2830 states and 8649 transitions. [2021-05-03 13:52:25,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 8649 transitions. [2021-05-03 13:52:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:25,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:25,008 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:25,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-05-03 13:52:25,208 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1769454061, now seen corresponding path program 216 times [2021-05-03 13:52:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:25,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720854267] [2021-05-03 13:52:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:25,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720854267] [2021-05-03 13:52:25,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131979707] [2021-05-03 13:52:25,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:25,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:52:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 13:52:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251901337] [2021-05-03 13:52:25,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:52:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:52:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:25,435 INFO L87 Difference]: Start difference. First operand 2830 states and 8649 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:26,390 INFO L93 Difference]: Finished difference Result 3572 states and 10299 transitions. [2021-05-03 13:52:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:52:26,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:26,395 INFO L225 Difference]: With dead ends: 3572 [2021-05-03 13:52:26,395 INFO L226 Difference]: Without dead ends: 3564 [2021-05-03 13:52:26,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:52:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-05-03 13:52:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2871. [2021-05-03 13:52:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2870 states have (on average 3.0609756097560976) internal successors, (8785), 2870 states have internal predecessors, (8785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 8785 transitions. [2021-05-03 13:52:26,445 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 8785 transitions. Word has length 22 [2021-05-03 13:52:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:26,445 INFO L480 AbstractCegarLoop]: Abstraction has 2871 states and 8785 transitions. [2021-05-03 13:52:26,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 8785 transitions. [2021-05-03 13:52:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:26,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:26,448 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:26,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-05-03 13:52:26,649 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:26,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1483937167, now seen corresponding path program 217 times [2021-05-03 13:52:26,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:26,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719086262] [2021-05-03 13:52:26,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:26,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719086262] [2021-05-03 13:52:26,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902775139] [2021-05-03 13:52:26,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:26,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:26,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:26,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:26,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-05-03 13:52:26,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363933572] [2021-05-03 13:52:26,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:26,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:26,899 INFO L87 Difference]: Start difference. First operand 2871 states and 8785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:27,775 INFO L93 Difference]: Finished difference Result 3644 states and 10545 transitions. [2021-05-03 13:52:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:52:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:27,780 INFO L225 Difference]: With dead ends: 3644 [2021-05-03 13:52:27,780 INFO L226 Difference]: Without dead ends: 3632 [2021-05-03 13:52:27,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:52:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2021-05-03 13:52:27,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2921. [2021-05-03 13:52:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2921 states, 2920 states have (on average 3.0705479452054796) internal successors, (8966), 2920 states have internal predecessors, (8966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2921 states to 2921 states and 8966 transitions. [2021-05-03 13:52:27,819 INFO L78 Accepts]: Start accepts. Automaton has 2921 states and 8966 transitions. Word has length 22 [2021-05-03 13:52:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:27,819 INFO L480 AbstractCegarLoop]: Abstraction has 2921 states and 8966 transitions. [2021-05-03 13:52:27,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2921 states and 8966 transitions. [2021-05-03 13:52:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:27,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:27,839 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:28,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:28,041 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:28,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash -740149869, now seen corresponding path program 218 times [2021-05-03 13:52:28,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:28,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450445893] [2021-05-03 13:52:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450445893] [2021-05-03 13:52:28,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849358203] [2021-05-03 13:52:28,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:28,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:28,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:28,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:28,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-03 13:52:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402822413] [2021-05-03 13:52:28,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:28,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:28,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:28,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:28,296 INFO L87 Difference]: Start difference. First operand 2921 states and 8966 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:29,036 INFO L93 Difference]: Finished difference Result 3521 states and 10275 transitions. [2021-05-03 13:52:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 13:52:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:29,040 INFO L225 Difference]: With dead ends: 3521 [2021-05-03 13:52:29,040 INFO L226 Difference]: Without dead ends: 3505 [2021-05-03 13:52:29,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:52:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3505 states. [2021-05-03 13:52:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3505 to 2952. [2021-05-03 13:52:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.0701457133175194) internal successors, (9060), 2951 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 9060 transitions. [2021-05-03 13:52:29,073 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 9060 transitions. Word has length 22 [2021-05-03 13:52:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:29,073 INFO L480 AbstractCegarLoop]: Abstraction has 2952 states and 9060 transitions. [2021-05-03 13:52:29,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 9060 transitions. [2021-05-03 13:52:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:29,075 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:29,076 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:29,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-05-03 13:52:29,276 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:29,276 INFO L82 PathProgramCache]: Analyzing trace with hash 614822987, now seen corresponding path program 219 times [2021-05-03 13:52:29,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:29,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182013497] [2021-05-03 13:52:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:29,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182013497] [2021-05-03 13:52:29,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971473296] [2021-05-03 13:52:29,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:29,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:29,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:29,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:29,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-05-03 13:52:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497640110] [2021-05-03 13:52:29,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:29,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:29,517 INFO L87 Difference]: Start difference. First operand 2952 states and 9060 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:30,286 INFO L93 Difference]: Finished difference Result 4650 states and 13519 transitions. [2021-05-03 13:52:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:52:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:30,292 INFO L225 Difference]: With dead ends: 4650 [2021-05-03 13:52:30,292 INFO L226 Difference]: Without dead ends: 4641 [2021-05-03 13:52:30,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 627.4ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:52:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-05-03 13:52:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3535. [2021-05-03 13:52:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 3.116581777023203) internal successors, (11014), 3534 states have internal predecessors, (11014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 11014 transitions. [2021-05-03 13:52:30,346 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 11014 transitions. Word has length 22 [2021-05-03 13:52:30,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:30,346 INFO L480 AbstractCegarLoop]: Abstraction has 3535 states and 11014 transitions. [2021-05-03 13:52:30,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 11014 transitions. [2021-05-03 13:52:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:30,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:30,350 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:30,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-05-03 13:52:30,550 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash 150231883, now seen corresponding path program 220 times [2021-05-03 13:52:30,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:30,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956147610] [2021-05-03 13:52:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956147610] [2021-05-03 13:52:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168104877] [2021-05-03 13:52:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:30,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:30,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:30,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:30,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-05-03 13:52:30,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032568434] [2021-05-03 13:52:30,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:30,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:30,758 INFO L87 Difference]: Start difference. First operand 3535 states and 11014 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:32,049 INFO L93 Difference]: Finished difference Result 4324 states and 12650 transitions. [2021-05-03 13:52:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 13:52:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:32,055 INFO L225 Difference]: With dead ends: 4324 [2021-05-03 13:52:32,056 INFO L226 Difference]: Without dead ends: 4320 [2021-05-03 13:52:32,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 13:52:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-05-03 13:52:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 3452. [2021-05-03 13:52:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 3451 states have (on average 3.1048971312662994) internal successors, (10715), 3451 states have internal predecessors, (10715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 10715 transitions. [2021-05-03 13:52:32,109 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 10715 transitions. Word has length 22 [2021-05-03 13:52:32,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:32,109 INFO L480 AbstractCegarLoop]: Abstraction has 3452 states and 10715 transitions. [2021-05-03 13:52:32,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:32,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 10715 transitions. [2021-05-03 13:52:32,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:32,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:32,113 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:32,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-05-03 13:52:32,314 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash 116632655, now seen corresponding path program 221 times [2021-05-03 13:52:32,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:32,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611691029] [2021-05-03 13:52:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611691029] [2021-05-03 13:52:32,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747597674] [2021-05-03 13:52:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:32,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:52:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:32,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:32,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:32,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-05-03 13:52:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316094878] [2021-05-03 13:52:32,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:52:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:52:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:32,549 INFO L87 Difference]: Start difference. First operand 3452 states and 10715 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:33,558 INFO L93 Difference]: Finished difference Result 4399 states and 12968 transitions. [2021-05-03 13:52:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:52:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:33,563 INFO L225 Difference]: With dead ends: 4399 [2021-05-03 13:52:33,563 INFO L226 Difference]: Without dead ends: 4391 [2021-05-03 13:52:33,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 911.2ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 13:52:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2021-05-03 13:52:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3540. [2021-05-03 13:52:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 3.1150042384854477) internal successors, (11024), 3539 states have internal predecessors, (11024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 11024 transitions. [2021-05-03 13:52:33,607 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 11024 transitions. Word has length 22 [2021-05-03 13:52:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:33,607 INFO L480 AbstractCegarLoop]: Abstraction has 3540 states and 11024 transitions. [2021-05-03 13:52:33,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 11024 transitions. [2021-05-03 13:52:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:33,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:33,611 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:33,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:33,812 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash -924943413, now seen corresponding path program 222 times [2021-05-03 13:52:33,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:33,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118523986] [2021-05-03 13:52:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:33,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118523986] [2021-05-03 13:52:33,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343913826] [2021-05-03 13:52:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:33,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:52:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:34,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:34,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-05-03 13:52:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173552529] [2021-05-03 13:52:34,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:34,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:34,105 INFO L87 Difference]: Start difference. First operand 3540 states and 11024 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:35,083 INFO L93 Difference]: Finished difference Result 4554 states and 13499 transitions. [2021-05-03 13:52:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 13:52:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:35,088 INFO L225 Difference]: With dead ends: 4554 [2021-05-03 13:52:35,088 INFO L226 Difference]: Without dead ends: 4542 [2021-05-03 13:52:35,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 899.4ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 13:52:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2021-05-03 13:52:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 3796. [2021-05-03 13:52:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 3.129907773386034) internal successors, (11878), 3795 states have internal predecessors, (11878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 11878 transitions. [2021-05-03 13:52:35,135 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 11878 transitions. Word has length 22 [2021-05-03 13:52:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:35,135 INFO L480 AbstractCegarLoop]: Abstraction has 3796 states and 11878 transitions. [2021-05-03 13:52:35,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 11878 transitions. [2021-05-03 13:52:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:35,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:35,139 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:35,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-03 13:52:35,339 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1145936847, now seen corresponding path program 223 times [2021-05-03 13:52:35,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:35,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762165067] [2021-05-03 13:52:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:35,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762165067] [2021-05-03 13:52:35,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814985303] [2021-05-03 13:52:35,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:35,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:35,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-05-03 13:52:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57148090] [2021-05-03 13:52:35,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:35,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:35,575 INFO L87 Difference]: Start difference. First operand 3796 states and 11878 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:36,522 INFO L93 Difference]: Finished difference Result 4840 states and 14458 transitions. [2021-05-03 13:52:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 13:52:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:36,528 INFO L225 Difference]: With dead ends: 4840 [2021-05-03 13:52:36,528 INFO L226 Difference]: Without dead ends: 4824 [2021-05-03 13:52:36,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:52:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-05-03 13:52:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4073. [2021-05-03 13:52:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.143909626719057) internal successors, (12802), 4072 states have internal predecessors, (12802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 12802 transitions. [2021-05-03 13:52:36,582 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 12802 transitions. Word has length 22 [2021-05-03 13:52:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:36,582 INFO L480 AbstractCegarLoop]: Abstraction has 4073 states and 12802 transitions. [2021-05-03 13:52:36,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 12802 transitions. [2021-05-03 13:52:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:36,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:36,586 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:36,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-03 13:52:36,789 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 918715467, now seen corresponding path program 224 times [2021-05-03 13:52:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:36,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381384040] [2021-05-03 13:52:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381384040] [2021-05-03 13:52:36,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066778083] [2021-05-03 13:52:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:36,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:36,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:37,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:37,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 13:52:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787702922] [2021-05-03 13:52:37,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:37,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:37,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:37,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:37,110 INFO L87 Difference]: Start difference. First operand 4073 states and 12802 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:37,848 INFO L93 Difference]: Finished difference Result 4789 states and 14429 transitions. [2021-05-03 13:52:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 13:52:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:37,855 INFO L225 Difference]: With dead ends: 4789 [2021-05-03 13:52:37,855 INFO L226 Difference]: Without dead ends: 4769 [2021-05-03 13:52:37,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:52:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-05-03 13:52:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 4116. [2021-05-03 13:52:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4115 states have (on average 3.143377885783718) internal successors, (12935), 4115 states have internal predecessors, (12935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 12935 transitions. [2021-05-03 13:52:37,932 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 12935 transitions. Word has length 22 [2021-05-03 13:52:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:37,933 INFO L480 AbstractCegarLoop]: Abstraction has 4116 states and 12935 transitions. [2021-05-03 13:52:37,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 12935 transitions. [2021-05-03 13:52:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:37,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:37,937 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:38,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:38,137 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:38,138 INFO L82 PathProgramCache]: Analyzing trace with hash 124564107, now seen corresponding path program 225 times [2021-05-03 13:52:38,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:38,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6662558] [2021-05-03 13:52:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:38,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6662558] [2021-05-03 13:52:38,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606553137] [2021-05-03 13:52:38,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:52:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:38,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:38,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-05-03 13:52:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935240736] [2021-05-03 13:52:38,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:52:38,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:52:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:52:38,362 INFO L87 Difference]: Start difference. First operand 4116 states and 12935 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:38,530 INFO L93 Difference]: Finished difference Result 4973 states and 15309 transitions. [2021-05-03 13:52:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:52:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:38,538 INFO L225 Difference]: With dead ends: 4973 [2021-05-03 13:52:38,538 INFO L226 Difference]: Without dead ends: 4973 [2021-05-03 13:52:38,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:52:38,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-05-03 13:52:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4166. [2021-05-03 13:52:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 3.1423769507803123) internal successors, (13088), 4165 states have internal predecessors, (13088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 13088 transitions. [2021-05-03 13:52:38,601 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 13088 transitions. Word has length 22 [2021-05-03 13:52:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:38,601 INFO L480 AbstractCegarLoop]: Abstraction has 4166 states and 13088 transitions. [2021-05-03 13:52:38,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:38,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 13088 transitions. [2021-05-03 13:52:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:38,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:38,606 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:38,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-05-03 13:52:38,807 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:38,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1397497815, now seen corresponding path program 226 times [2021-05-03 13:52:38,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:38,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825005909] [2021-05-03 13:52:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825005909] [2021-05-03 13:52:38,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923150572] [2021-05-03 13:52:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:38,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:38,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:38,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:39,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:39,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:39,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775297330] [2021-05-03 13:52:39,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:39,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:39,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:39,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:39,037 INFO L87 Difference]: Start difference. First operand 4166 states and 13088 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:39,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:39,314 INFO L93 Difference]: Finished difference Result 4567 states and 14102 transitions. [2021-05-03 13:52:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:52:39,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:39,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:39,320 INFO L225 Difference]: With dead ends: 4567 [2021-05-03 13:52:39,321 INFO L226 Difference]: Without dead ends: 4567 [2021-05-03 13:52:39,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:52:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-05-03 13:52:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4183. [2021-05-03 13:52:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 3.141798182687709) internal successors, (13139), 4182 states have internal predecessors, (13139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 13139 transitions. [2021-05-03 13:52:39,377 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 13139 transitions. Word has length 22 [2021-05-03 13:52:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:39,377 INFO L480 AbstractCegarLoop]: Abstraction has 4183 states and 13139 transitions. [2021-05-03 13:52:39,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 13139 transitions. [2021-05-03 13:52:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:39,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:39,382 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:39,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:39,583 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1207526577, now seen corresponding path program 227 times [2021-05-03 13:52:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:39,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800337623] [2021-05-03 13:52:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800337623] [2021-05-03 13:52:39,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563719867] [2021-05-03 13:52:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:39,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:52:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:39,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:39,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:39,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361484455] [2021-05-03 13:52:39,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:39,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:39,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:39,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:39,830 INFO L87 Difference]: Start difference. First operand 4183 states and 13139 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:40,210 INFO L93 Difference]: Finished difference Result 4690 states and 14429 transitions. [2021-05-03 13:52:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:52:40,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:40,216 INFO L225 Difference]: With dead ends: 4690 [2021-05-03 13:52:40,216 INFO L226 Difference]: Without dead ends: 4690 [2021-05-03 13:52:40,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:52:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-05-03 13:52:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 4200. [2021-05-03 13:52:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4199 states have (on average 3.141224100976423) internal successors, (13190), 4199 states have internal predecessors, (13190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 13190 transitions. [2021-05-03 13:52:40,260 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 13190 transitions. Word has length 22 [2021-05-03 13:52:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:40,260 INFO L480 AbstractCegarLoop]: Abstraction has 4200 states and 13190 transitions. [2021-05-03 13:52:40,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 13190 transitions. [2021-05-03 13:52:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:40,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:40,264 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:40,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-05-03 13:52:40,465 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash -321728297, now seen corresponding path program 228 times [2021-05-03 13:52:40,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:40,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604756153] [2021-05-03 13:52:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:40,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604756153] [2021-05-03 13:52:40,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8100231] [2021-05-03 13:52:40,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:40,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:52:40,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:40,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:40,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:40,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172645895] [2021-05-03 13:52:40,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:40,681 INFO L87 Difference]: Start difference. First operand 4200 states and 13190 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:41,315 INFO L93 Difference]: Finished difference Result 4708 states and 14414 transitions. [2021-05-03 13:52:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:52:41,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:41,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:41,321 INFO L225 Difference]: With dead ends: 4708 [2021-05-03 13:52:41,321 INFO L226 Difference]: Without dead ends: 4708 [2021-05-03 13:52:41,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=756, Invalid=1500, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:52:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-05-03 13:52:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 4231. [2021-05-03 13:52:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.1397163120567377) internal successors, (13281), 4230 states have internal predecessors, (13281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 13281 transitions. [2021-05-03 13:52:41,376 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 13281 transitions. Word has length 22 [2021-05-03 13:52:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:41,377 INFO L480 AbstractCegarLoop]: Abstraction has 4231 states and 13281 transitions. [2021-05-03 13:52:41,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 13281 transitions. [2021-05-03 13:52:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:41,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:41,382 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:41,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:41,582 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1785055823, now seen corresponding path program 229 times [2021-05-03 13:52:41,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:41,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368948760] [2021-05-03 13:52:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368948760] [2021-05-03 13:52:41,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769333234] [2021-05-03 13:52:41,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:41,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:41,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:41,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:41,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:41,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851809809] [2021-05-03 13:52:41,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:41,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:41,782 INFO L87 Difference]: Start difference. First operand 4231 states and 13281 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:42,506 INFO L93 Difference]: Finished difference Result 4892 states and 14848 transitions. [2021-05-03 13:52:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 13:52:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:42,513 INFO L225 Difference]: With dead ends: 4892 [2021-05-03 13:52:42,513 INFO L226 Difference]: Without dead ends: 4892 [2021-05-03 13:52:42,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=1057, Invalid=2023, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 13:52:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-05-03 13:52:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4293. [2021-05-03 13:52:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 3.140959925442684) internal successors, (13481), 4292 states have internal predecessors, (13481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 13481 transitions. [2021-05-03 13:52:42,573 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 13481 transitions. Word has length 22 [2021-05-03 13:52:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:42,573 INFO L480 AbstractCegarLoop]: Abstraction has 4293 states and 13481 transitions. [2021-05-03 13:52:42,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 13481 transitions. [2021-05-03 13:52:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:42,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:42,579 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:42,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-03 13:52:42,779 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:42,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:42,779 INFO L82 PathProgramCache]: Analyzing trace with hash -363740713, now seen corresponding path program 230 times [2021-05-03 13:52:42,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:42,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749316882] [2021-05-03 13:52:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:42,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749316882] [2021-05-03 13:52:42,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464925298] [2021-05-03 13:52:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:42,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:43,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:43,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:43,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616101140] [2021-05-03 13:52:43,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:43,027 INFO L87 Difference]: Start difference. First operand 4293 states and 13481 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:43,846 INFO L93 Difference]: Finished difference Result 5068 states and 15287 transitions. [2021-05-03 13:52:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:52:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:43,854 INFO L225 Difference]: With dead ends: 5068 [2021-05-03 13:52:43,854 INFO L226 Difference]: Without dead ends: 5068 [2021-05-03 13:52:43,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 678.5ms TimeCoverageRelationStatistics Valid=1188, Invalid=2118, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 13:52:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2021-05-03 13:52:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 4271. [2021-05-03 13:52:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 3.1475409836065573) internal successors, (13440), 4270 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 13440 transitions. [2021-05-03 13:52:43,921 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 13440 transitions. Word has length 22 [2021-05-03 13:52:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:43,921 INFO L480 AbstractCegarLoop]: Abstraction has 4271 states and 13440 transitions. [2021-05-03 13:52:43,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 13440 transitions. [2021-05-03 13:52:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:43,926 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:43,926 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:44,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-05-03 13:52:44,127 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash 207714093, now seen corresponding path program 231 times [2021-05-03 13:52:44,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:44,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270674615] [2021-05-03 13:52:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270674615] [2021-05-03 13:52:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314109002] [2021-05-03 13:52:44,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:44,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:44,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:44,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:44,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:44,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054747740] [2021-05-03 13:52:44,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:44,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:44,332 INFO L87 Difference]: Start difference. First operand 4271 states and 13440 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:45,257 INFO L93 Difference]: Finished difference Result 4740 states and 14442 transitions. [2021-05-03 13:52:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:52:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:45,264 INFO L225 Difference]: With dead ends: 4740 [2021-05-03 13:52:45,264 INFO L226 Difference]: Without dead ends: 4734 [2021-05-03 13:52:45,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 769.7ms TimeCoverageRelationStatistics Valid=1484, Invalid=2806, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 13:52:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4734 states. [2021-05-03 13:52:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4734 to 4087. [2021-05-03 13:52:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4087 states, 4086 states have (on average 3.137542829172785) internal successors, (12820), 4086 states have internal predecessors, (12820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4087 states to 4087 states and 12820 transitions. [2021-05-03 13:52:45,318 INFO L78 Accepts]: Start accepts. Automaton has 4087 states and 12820 transitions. Word has length 22 [2021-05-03 13:52:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:45,318 INFO L480 AbstractCegarLoop]: Abstraction has 4087 states and 12820 transitions. [2021-05-03 13:52:45,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4087 states and 12820 transitions. [2021-05-03 13:52:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:45,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:45,323 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:45,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-05-03 13:52:45,523 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1723857453, now seen corresponding path program 232 times [2021-05-03 13:52:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:45,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897271493] [2021-05-03 13:52:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:45,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897271493] [2021-05-03 13:52:45,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118182485] [2021-05-03 13:52:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:45,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:45,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:45,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:45,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:45,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:45,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537787950] [2021-05-03 13:52:45,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:45,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:45,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:45,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:45,761 INFO L87 Difference]: Start difference. First operand 4087 states and 12820 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:46,462 INFO L93 Difference]: Finished difference Result 5641 states and 17112 transitions. [2021-05-03 13:52:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:52:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:46,470 INFO L225 Difference]: With dead ends: 5641 [2021-05-03 13:52:46,470 INFO L226 Difference]: Without dead ends: 5629 [2021-05-03 13:52:46,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=837, Invalid=1713, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:52:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2021-05-03 13:52:46,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 4769. [2021-05-03 13:52:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4769 states, 4768 states have (on average 3.1621224832214767) internal successors, (15077), 4768 states have internal predecessors, (15077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4769 states to 4769 states and 15077 transitions. [2021-05-03 13:52:46,551 INFO L78 Accepts]: Start accepts. Automaton has 4769 states and 15077 transitions. Word has length 22 [2021-05-03 13:52:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:46,551 INFO L480 AbstractCegarLoop]: Abstraction has 4769 states and 15077 transitions. [2021-05-03 13:52:46,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:46,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4769 states and 15077 transitions. [2021-05-03 13:52:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:46,557 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:46,557 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:46,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:46,757 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2106518739, now seen corresponding path program 233 times [2021-05-03 13:52:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:46,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572198888] [2021-05-03 13:52:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572198888] [2021-05-03 13:52:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402783307] [2021-05-03 13:52:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:46,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:52:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:46,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:46,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828431349] [2021-05-03 13:52:46,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:46,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:46,978 INFO L87 Difference]: Start difference. First operand 4769 states and 15077 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:47,816 INFO L93 Difference]: Finished difference Result 5550 states and 16864 transitions. [2021-05-03 13:52:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 13:52:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:47,825 INFO L225 Difference]: With dead ends: 5550 [2021-05-03 13:52:47,825 INFO L226 Difference]: Without dead ends: 5546 [2021-05-03 13:52:47,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 651.4ms TimeCoverageRelationStatistics Valid=851, Invalid=2571, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 13:52:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-05-03 13:52:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4533. [2021-05-03 13:52:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.1385701676963813) internal successors, (14224), 4532 states have internal predecessors, (14224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 14224 transitions. [2021-05-03 13:52:47,892 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 14224 transitions. Word has length 22 [2021-05-03 13:52:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:47,892 INFO L480 AbstractCegarLoop]: Abstraction has 4533 states and 14224 transitions. [2021-05-03 13:52:47,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 14224 transitions. [2021-05-03 13:52:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:47,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:47,898 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:48,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-05-03 13:52:48,098 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2072919511, now seen corresponding path program 234 times [2021-05-03 13:52:48,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:48,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150283996] [2021-05-03 13:52:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:48,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150283996] [2021-05-03 13:52:48,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934926996] [2021-05-03 13:52:48,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:48,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:52:48,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:48,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:48,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:48,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:48,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385077840] [2021-05-03 13:52:48,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:48,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:48,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:48,313 INFO L87 Difference]: Start difference. First operand 4533 states and 14224 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:48,987 INFO L93 Difference]: Finished difference Result 5471 states and 16546 transitions. [2021-05-03 13:52:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 13:52:48,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:48,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:48,995 INFO L225 Difference]: With dead ends: 5471 [2021-05-03 13:52:48,995 INFO L226 Difference]: Without dead ends: 5463 [2021-05-03 13:52:48,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=728, Invalid=2352, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 13:52:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-05-03 13:52:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4659. [2021-05-03 13:52:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.1386861313868613) internal successors, (14620), 4658 states have internal predecessors, (14620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 14620 transitions. [2021-05-03 13:52:49,055 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 14620 transitions. Word has length 22 [2021-05-03 13:52:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:49,055 INFO L480 AbstractCegarLoop]: Abstraction has 4659 states and 14620 transitions. [2021-05-03 13:52:49,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 14620 transitions. [2021-05-03 13:52:49,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:49,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:49,060 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:49,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:49,261 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1031343443, now seen corresponding path program 235 times [2021-05-03 13:52:49,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:49,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706124386] [2021-05-03 13:52:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:49,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706124386] [2021-05-03 13:52:49,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295292031] [2021-05-03 13:52:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:49,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:49,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:49,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:49,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390577703] [2021-05-03 13:52:49,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:49,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:49,494 INFO L87 Difference]: Start difference. First operand 4659 states and 14620 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:50,208 INFO L93 Difference]: Finished difference Result 5651 states and 17165 transitions. [2021-05-03 13:52:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 13:52:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:50,216 INFO L225 Difference]: With dead ends: 5651 [2021-05-03 13:52:50,216 INFO L226 Difference]: Without dead ends: 5639 [2021-05-03 13:52:50,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=630, Invalid=2126, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:52:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-05-03 13:52:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4746. [2021-05-03 13:52:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4745 states have (on average 3.134668071654373) internal successors, (14874), 4745 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 14874 transitions. [2021-05-03 13:52:50,284 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 14874 transitions. Word has length 22 [2021-05-03 13:52:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:50,284 INFO L480 AbstractCegarLoop]: Abstraction has 4746 states and 14874 transitions. [2021-05-03 13:52:50,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 14874 transitions. [2021-05-03 13:52:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:50,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:50,315 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:50,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:50,516 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1192743593, now seen corresponding path program 236 times [2021-05-03 13:52:50,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:50,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455087090] [2021-05-03 13:52:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455087090] [2021-05-03 13:52:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103468054] [2021-05-03 13:52:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:50,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:50,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:50,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:50,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542745621] [2021-05-03 13:52:50,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:50,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:50,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:50,742 INFO L87 Difference]: Start difference. First operand 4746 states and 14874 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:51,291 INFO L93 Difference]: Finished difference Result 5785 states and 17615 transitions. [2021-05-03 13:52:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:52:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:51,297 INFO L225 Difference]: With dead ends: 5785 [2021-05-03 13:52:51,297 INFO L226 Difference]: Without dead ends: 5769 [2021-05-03 13:52:51,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=558, Invalid=1892, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:52:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5769 states. [2021-05-03 13:52:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5769 to 4762. [2021-05-03 13:52:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.131064902331443) internal successors, (14907), 4761 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14907 transitions. [2021-05-03 13:52:51,365 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14907 transitions. Word has length 22 [2021-05-03 13:52:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:51,366 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14907 transitions. [2021-05-03 13:52:51,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14907 transitions. [2021-05-03 13:52:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:51,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:51,371 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:51,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2021-05-03 13:52:51,573 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1419964973, now seen corresponding path program 237 times [2021-05-03 13:52:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:51,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143470385] [2021-05-03 13:52:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143470385] [2021-05-03 13:52:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126983301] [2021-05-03 13:52:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:51,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:52:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:51,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:51,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-05-03 13:52:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846447407] [2021-05-03 13:52:51,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:51,815 INFO L87 Difference]: Start difference. First operand 4762 states and 14907 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:52,242 INFO L93 Difference]: Finished difference Result 5323 states and 16253 transitions. [2021-05-03 13:52:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:52:52,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:52,250 INFO L225 Difference]: With dead ends: 5323 [2021-05-03 13:52:52,250 INFO L226 Difference]: Without dead ends: 5313 [2021-05-03 13:52:52,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 13:52:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-05-03 13:52:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4762. [2021-05-03 13:52:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1300147027935306) internal successors, (14902), 4761 states have internal predecessors, (14902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14902 transitions. [2021-05-03 13:52:52,331 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14902 transitions. Word has length 22 [2021-05-03 13:52:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:52,331 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14902 transitions. [2021-05-03 13:52:52,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14902 transitions. [2021-05-03 13:52:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:52,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:52,337 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:52,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:52,537 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1143175849, now seen corresponding path program 238 times [2021-05-03 13:52:52,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:52,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117118553] [2021-05-03 13:52:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:52,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117118553] [2021-05-03 13:52:52,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944831192] [2021-05-03 13:52:52,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:52,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:52,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:52,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:52,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-05-03 13:52:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14523143] [2021-05-03 13:52:52,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:52:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:52:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:52:52,756 INFO L87 Difference]: Start difference. First operand 4762 states and 14902 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:52,909 INFO L93 Difference]: Finished difference Result 5170 states and 15985 transitions. [2021-05-03 13:52:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:52:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:52,916 INFO L225 Difference]: With dead ends: 5170 [2021-05-03 13:52:52,916 INFO L226 Difference]: Without dead ends: 5158 [2021-05-03 13:52:52,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=213, Invalid=599, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:52:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-05-03 13:52:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4762. [2021-05-03 13:52:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4762 states, 4761 states have (on average 3.1298046628859484) internal successors, (14901), 4761 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4762 states to 4762 states and 14901 transitions. [2021-05-03 13:52:52,972 INFO L78 Accepts]: Start accepts. Automaton has 4762 states and 14901 transitions. Word has length 22 [2021-05-03 13:52:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:52,972 INFO L480 AbstractCegarLoop]: Abstraction has 4762 states and 14901 transitions. [2021-05-03 13:52:52,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4762 states and 14901 transitions. [2021-05-03 13:52:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:52,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:52,977 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:53,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:53,178 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2091230197, now seen corresponding path program 239 times [2021-05-03 13:52:53,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:53,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741110742] [2021-05-03 13:52:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741110742] [2021-05-03 13:52:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840571073] [2021-05-03 13:52:53,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:53,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:52:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:53,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:53,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-05-03 13:52:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335137232] [2021-05-03 13:52:53,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:52:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:53,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:52:53,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:52:53,425 INFO L87 Difference]: Start difference. First operand 4762 states and 14901 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:54,044 INFO L93 Difference]: Finished difference Result 5204 states and 15992 transitions. [2021-05-03 13:52:54,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 13:52:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:54,052 INFO L225 Difference]: With dead ends: 5204 [2021-05-03 13:52:54,053 INFO L226 Difference]: Without dead ends: 5204 [2021-05-03 13:52:54,053 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=785, Invalid=1665, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:52:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5204 states. [2021-05-03 13:52:54,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5204 to 4777. [2021-05-03 13:52:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4777 states, 4776 states have (on average 3.129396984924623) internal successors, (14946), 4776 states have internal predecessors, (14946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4777 states to 4777 states and 14946 transitions. [2021-05-03 13:52:54,144 INFO L78 Accepts]: Start accepts. Automaton has 4777 states and 14946 transitions. Word has length 22 [2021-05-03 13:52:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:54,144 INFO L480 AbstractCegarLoop]: Abstraction has 4777 states and 14946 transitions. [2021-05-03 13:52:54,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4777 states and 14946 transitions. [2021-05-03 13:52:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:54,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:54,150 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:54,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-05-03 13:52:54,350 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:54,351 INFO L82 PathProgramCache]: Analyzing trace with hash 447335179, now seen corresponding path program 240 times [2021-05-03 13:52:54,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:54,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172496337] [2021-05-03 13:52:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:54,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172496337] [2021-05-03 13:52:54,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019400607] [2021-05-03 13:52:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:54,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:52:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:54,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:54,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:54,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140971737] [2021-05-03 13:52:54,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:54,590 INFO L87 Difference]: Start difference. First operand 4777 states and 14946 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:55,171 INFO L93 Difference]: Finished difference Result 5391 states and 16437 transitions. [2021-05-03 13:52:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:52:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:55,178 INFO L225 Difference]: With dead ends: 5391 [2021-05-03 13:52:55,178 INFO L226 Difference]: Without dead ends: 5381 [2021-05-03 13:52:55,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=600, Invalid=1292, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:52:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2021-05-03 13:52:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 4798. [2021-05-03 13:52:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 4797 states have (on average 3.128413591828226) internal successors, (15007), 4797 states have internal predecessors, (15007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 15007 transitions. [2021-05-03 13:52:55,239 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 15007 transitions. Word has length 22 [2021-05-03 13:52:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:55,239 INFO L480 AbstractCegarLoop]: Abstraction has 4798 states and 15007 transitions. [2021-05-03 13:52:55,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 15007 transitions. [2021-05-03 13:52:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:55,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:55,245 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:55,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-05-03 13:52:55,446 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1271890933, now seen corresponding path program 241 times [2021-05-03 13:52:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:55,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964020129] [2021-05-03 13:52:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:55,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964020129] [2021-05-03 13:52:55,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671854525] [2021-05-03 13:52:55,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:55,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:55,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:55,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:55,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:55,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276406536] [2021-05-03 13:52:55,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:55,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:55,654 INFO L87 Difference]: Start difference. First operand 4798 states and 15007 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:56,196 INFO L93 Difference]: Finished difference Result 5359 states and 16352 transitions. [2021-05-03 13:52:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:52:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:56,223 INFO L225 Difference]: With dead ends: 5359 [2021-05-03 13:52:56,224 INFO L226 Difference]: Without dead ends: 5349 [2021-05-03 13:52:56,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1284, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:52:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5349 states. [2021-05-03 13:52:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5349 to 4815. [2021-05-03 13:52:56,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4815 states, 4814 states have (on average 3.1258828417116744) internal successors, (15048), 4814 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4815 states to 4815 states and 15048 transitions. [2021-05-03 13:52:56,299 INFO L78 Accepts]: Start accepts. Automaton has 4815 states and 15048 transitions. Word has length 22 [2021-05-03 13:52:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:56,299 INFO L480 AbstractCegarLoop]: Abstraction has 4815 states and 15048 transitions. [2021-05-03 13:52:56,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4815 states and 15048 transitions. [2021-05-03 13:52:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:56,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:56,306 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:56,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-03 13:52:56,507 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1720691467, now seen corresponding path program 242 times [2021-05-03 13:52:56,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:56,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181993431] [2021-05-03 13:52:56,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181993431] [2021-05-03 13:52:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513990941] [2021-05-03 13:52:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:56,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:56,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:56,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:56,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260089414] [2021-05-03 13:52:56,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:56,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:56,770 INFO L87 Difference]: Start difference. First operand 4815 states and 15048 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:57,565 INFO L93 Difference]: Finished difference Result 5632 states and 17049 transitions. [2021-05-03 13:52:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:52:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:57,575 INFO L225 Difference]: With dead ends: 5632 [2021-05-03 13:52:57,575 INFO L226 Difference]: Without dead ends: 5628 [2021-05-03 13:52:57,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=940, Invalid=1816, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:52:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-05-03 13:52:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4825. [2021-05-03 13:52:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 3.1237562189054726) internal successors, (15069), 4824 states have internal predecessors, (15069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 15069 transitions. [2021-05-03 13:52:57,650 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 15069 transitions. Word has length 22 [2021-05-03 13:52:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:57,650 INFO L480 AbstractCegarLoop]: Abstraction has 4825 states and 15069 transitions. [2021-05-03 13:52:57,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 15069 transitions. [2021-05-03 13:52:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:57,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:57,656 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:57,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:57,859 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:57,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1678679051, now seen corresponding path program 243 times [2021-05-03 13:52:57,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:57,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104322520] [2021-05-03 13:52:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:57,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104322520] [2021-05-03 13:52:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113796045] [2021-05-03 13:52:57,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:57,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:52:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:57,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:58,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:58,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753589182] [2021-05-03 13:52:58,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:58,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:58,075 INFO L87 Difference]: Start difference. First operand 4825 states and 15069 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:58,857 INFO L93 Difference]: Finished difference Result 5908 states and 17767 transitions. [2021-05-03 13:52:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:52:58,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:52:58,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:58,865 INFO L225 Difference]: With dead ends: 5908 [2021-05-03 13:52:58,866 INFO L226 Difference]: Without dead ends: 5908 [2021-05-03 13:52:58,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 13:52:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2021-05-03 13:52:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 4874. [2021-05-03 13:52:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4873 states have (on average 3.1329776318489637) internal successors, (15267), 4873 states have internal predecessors, (15267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 15267 transitions. [2021-05-03 13:52:58,937 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 15267 transitions. Word has length 22 [2021-05-03 13:52:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:58,937 INFO L480 AbstractCegarLoop]: Abstraction has 4874 states and 15267 transitions. [2021-05-03 13:52:58,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 15267 transitions. [2021-05-03 13:52:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:52:58,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:58,942 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:59,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-05-03 13:52:59,143 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2044833439, now seen corresponding path program 244 times [2021-05-03 13:52:59,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:59,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622702757] [2021-05-03 13:52:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622702757] [2021-05-03 13:52:59,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221202207] [2021-05-03 13:52:59,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:59,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:59,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:59,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:52:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:52:59,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:59,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-05-03 13:52:59,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747029137] [2021-05-03 13:52:59,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:52:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:52:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:52:59,372 INFO L87 Difference]: Start difference. First operand 4874 states and 15267 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:00,342 INFO L93 Difference]: Finished difference Result 5619 states and 16921 transitions. [2021-05-03 13:53:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 13:53:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:00,350 INFO L225 Difference]: With dead ends: 5619 [2021-05-03 13:53:00,350 INFO L226 Difference]: Without dead ends: 5607 [2021-05-03 13:53:00,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 830.3ms TimeCoverageRelationStatistics Valid=1461, Invalid=2961, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 13:53:00,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-05-03 13:53:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 4673. [2021-05-03 13:53:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 3.120291095890411) internal successors, (14578), 4672 states have internal predecessors, (14578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 14578 transitions. [2021-05-03 13:53:00,413 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 14578 transitions. Word has length 22 [2021-05-03 13:53:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:00,413 INFO L480 AbstractCegarLoop]: Abstraction has 4673 states and 14578 transitions. [2021-05-03 13:53:00,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 14578 transitions. [2021-05-03 13:53:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:00,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:00,418 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:00,618 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1509603637, now seen corresponding path program 245 times [2021-05-03 13:53:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505985514] [2021-05-03 13:53:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:00,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505985514] [2021-05-03 13:53:00,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258784767] [2021-05-03 13:53:00,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:00,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:53:00,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:00,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:00,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:00,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-05-03 13:53:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303421355] [2021-05-03 13:53:00,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:00,844 INFO L87 Difference]: Start difference. First operand 4673 states and 14578 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:01,653 INFO L93 Difference]: Finished difference Result 5350 states and 16179 transitions. [2021-05-03 13:53:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:53:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:01,661 INFO L225 Difference]: With dead ends: 5350 [2021-05-03 13:53:01,661 INFO L226 Difference]: Without dead ends: 5338 [2021-05-03 13:53:01,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 703.7ms TimeCoverageRelationStatistics Valid=1464, Invalid=3092, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:53:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-05-03 13:53:01,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4703. [2021-05-03 13:53:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 3.1207996597192684) internal successors, (14674), 4702 states have internal predecessors, (14674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 14674 transitions. [2021-05-03 13:53:01,724 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 14674 transitions. Word has length 22 [2021-05-03 13:53:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:01,724 INFO L480 AbstractCegarLoop]: Abstraction has 4703 states and 14674 transitions. [2021-05-03 13:53:01,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:01,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 14674 transitions. [2021-05-03 13:53:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:01,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:01,729 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:01,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-05-03 13:53:01,929 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1427351127, now seen corresponding path program 246 times [2021-05-03 13:53:01,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:01,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029420570] [2021-05-03 13:53:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029420570] [2021-05-03 13:53:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865079110] [2021-05-03 13:53:02,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:02,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:53:02,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:02,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:02,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 13:53:02,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839828658] [2021-05-03 13:53:02,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:02,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:02,255 INFO L87 Difference]: Start difference. First operand 4703 states and 14674 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:02,958 INFO L93 Difference]: Finished difference Result 5100 states and 15587 transitions. [2021-05-03 13:53:02,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:53:02,959 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:02,965 INFO L225 Difference]: With dead ends: 5100 [2021-05-03 13:53:02,966 INFO L226 Difference]: Without dead ends: 5100 [2021-05-03 13:53:02,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=907, Invalid=2063, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 13:53:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2021-05-03 13:53:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 4687. [2021-05-03 13:53:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.120998719590269) internal successors, (14625), 4686 states have internal predecessors, (14625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 14625 transitions. [2021-05-03 13:53:03,022 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 14625 transitions. Word has length 22 [2021-05-03 13:53:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:03,022 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 14625 transitions. [2021-05-03 13:53:03,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 14625 transitions. [2021-05-03 13:53:03,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:03,026 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:03,027 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:03,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-05-03 13:53:03,227 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash 208442063, now seen corresponding path program 247 times [2021-05-03 13:53:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521079394] [2021-05-03 13:53:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:03,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521079394] [2021-05-03 13:53:03,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678610950] [2021-05-03 13:53:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:03,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:03,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:03,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 13:53:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392638570] [2021-05-03 13:53:03,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:03,453 INFO L87 Difference]: Start difference. First operand 4687 states and 14625 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:04,072 INFO L93 Difference]: Finished difference Result 5184 states and 15752 transitions. [2021-05-03 13:53:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 13:53:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:04,080 INFO L225 Difference]: With dead ends: 5184 [2021-05-03 13:53:04,080 INFO L226 Difference]: Without dead ends: 5174 [2021-05-03 13:53:04,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=713, Invalid=1639, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:53:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-05-03 13:53:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4685. [2021-05-03 13:53:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4684 states have (on average 3.1195559350982065) internal successors, (14612), 4684 states have internal predecessors, (14612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 14612 transitions. [2021-05-03 13:53:04,148 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 14612 transitions. Word has length 22 [2021-05-03 13:53:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:04,148 INFO L480 AbstractCegarLoop]: Abstraction has 4685 states and 14612 transitions. [2021-05-03 13:53:04,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 14612 transitions. [2021-05-03 13:53:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:04,154 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:04,154 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:04,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:04,355 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash -662161577, now seen corresponding path program 248 times [2021-05-03 13:53:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550363478] [2021-05-03 13:53:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:04,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550363478] [2021-05-03 13:53:04,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947752956] [2021-05-03 13:53:04,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:04,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:04,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:04,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:04,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:04,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:53:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381095344] [2021-05-03 13:53:04,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:04,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:04,598 INFO L87 Difference]: Start difference. First operand 4685 states and 14612 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:05,315 INFO L93 Difference]: Finished difference Result 5658 states and 17075 transitions. [2021-05-03 13:53:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:53:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:05,322 INFO L225 Difference]: With dead ends: 5658 [2021-05-03 13:53:05,323 INFO L226 Difference]: Without dead ends: 5652 [2021-05-03 13:53:05,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=760, Invalid=1592, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:53:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-05-03 13:53:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4809. [2021-05-03 13:53:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 3.117512479201331) internal successors, (14989), 4808 states have internal predecessors, (14989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 14989 transitions. [2021-05-03 13:53:05,394 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 14989 transitions. Word has length 22 [2021-05-03 13:53:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:05,394 INFO L480 AbstractCegarLoop]: Abstraction has 4809 states and 14989 transitions. [2021-05-03 13:53:05,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 14989 transitions. [2021-05-03 13:53:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:05,400 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:05,400 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:05,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-05-03 13:53:05,601 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash -274603569, now seen corresponding path program 249 times [2021-05-03 13:53:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:05,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574185540] [2021-05-03 13:53:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:05,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574185540] [2021-05-03 13:53:05,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093769617] [2021-05-03 13:53:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:05,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:53:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:05,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:05,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:05,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:53:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039020093] [2021-05-03 13:53:05,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:05,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:05,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:05,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:05,823 INFO L87 Difference]: Start difference. First operand 4809 states and 14989 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:06,487 INFO L93 Difference]: Finished difference Result 5753 states and 17358 transitions. [2021-05-03 13:53:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 13:53:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:06,495 INFO L225 Difference]: With dead ends: 5753 [2021-05-03 13:53:06,495 INFO L226 Difference]: Without dead ends: 5749 [2021-05-03 13:53:06,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=805, Invalid=1547, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:53:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5749 states. [2021-05-03 13:53:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5749 to 4843. [2021-05-03 13:53:06,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4843 states, 4842 states have (on average 3.117513424204874) internal successors, (15095), 4842 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4843 states to 4843 states and 15095 transitions. [2021-05-03 13:53:06,561 INFO L78 Accepts]: Start accepts. Automaton has 4843 states and 15095 transitions. Word has length 22 [2021-05-03 13:53:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:06,561 INFO L480 AbstractCegarLoop]: Abstraction has 4843 states and 15095 transitions. [2021-05-03 13:53:06,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4843 states and 15095 transitions. [2021-05-03 13:53:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:06,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:06,567 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:06,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-03 13:53:06,768 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash 569182295, now seen corresponding path program 250 times [2021-05-03 13:53:06,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:06,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955265321] [2021-05-03 13:53:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955265321] [2021-05-03 13:53:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16886302] [2021-05-03 13:53:06,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:06,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:07,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:07,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:53:07,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155611279] [2021-05-03 13:53:07,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:07,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:07,022 INFO L87 Difference]: Start difference. First operand 4843 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:07,850 INFO L93 Difference]: Finished difference Result 6063 states and 18166 transitions. [2021-05-03 13:53:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 13:53:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:07,860 INFO L225 Difference]: With dead ends: 6063 [2021-05-03 13:53:07,860 INFO L226 Difference]: Without dead ends: 6063 [2021-05-03 13:53:07,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 692.8ms TimeCoverageRelationStatistics Valid=1038, Invalid=1824, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:53:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-05-03 13:53:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4876. [2021-05-03 13:53:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 3.125948717948718) internal successors, (15239), 4875 states have internal predecessors, (15239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 15239 transitions. [2021-05-03 13:53:07,934 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 15239 transitions. Word has length 22 [2021-05-03 13:53:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:07,934 INFO L480 AbstractCegarLoop]: Abstraction has 4876 states and 15239 transitions. [2021-05-03 13:53:07,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 15239 transitions. [2021-05-03 13:53:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:07,940 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:07,940 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:08,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:08,141 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1140637101, now seen corresponding path program 251 times [2021-05-03 13:53:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:08,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365458853] [2021-05-03 13:53:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365458853] [2021-05-03 13:53:08,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412457545] [2021-05-03 13:53:08,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:08,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:53:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:08,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:08,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:08,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:08,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-05-03 13:53:08,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199269127] [2021-05-03 13:53:08,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:08,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:08,366 INFO L87 Difference]: Start difference. First operand 4876 states and 15239 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:09,371 INFO L93 Difference]: Finished difference Result 5817 states and 17445 transitions. [2021-05-03 13:53:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:53:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:09,380 INFO L225 Difference]: With dead ends: 5817 [2021-05-03 13:53:09,380 INFO L226 Difference]: Without dead ends: 5808 [2021-05-03 13:53:09,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=1537, Invalid=3293, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:53:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-05-03 13:53:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4799. [2021-05-03 13:53:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 3.1192163401417257) internal successors, (14966), 4798 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 14966 transitions. [2021-05-03 13:53:09,452 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 14966 transitions. Word has length 22 [2021-05-03 13:53:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:09,452 INFO L480 AbstractCegarLoop]: Abstraction has 4799 states and 14966 transitions. [2021-05-03 13:53:09,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 14966 transitions. [2021-05-03 13:53:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:09,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:09,458 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:09,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-03 13:53:09,658 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1675866903, now seen corresponding path program 252 times [2021-05-03 13:53:09,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:09,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985911792] [2021-05-03 13:53:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985911792] [2021-05-03 13:53:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980156112] [2021-05-03 13:53:09,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:09,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:53:09,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:09,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:09,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:09,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-05-03 13:53:09,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535655911] [2021-05-03 13:53:09,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:09,927 INFO L87 Difference]: Start difference. First operand 4799 states and 14966 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:10,815 INFO L93 Difference]: Finished difference Result 5773 states and 17293 transitions. [2021-05-03 13:53:10,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 13:53:10,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:10,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:10,823 INFO L225 Difference]: With dead ends: 5773 [2021-05-03 13:53:10,823 INFO L226 Difference]: Without dead ends: 5755 [2021-05-03 13:53:10,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=1436, Invalid=3256, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:53:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-05-03 13:53:10,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 4708. [2021-05-03 13:53:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 3.11897174421075) internal successors, (14681), 4707 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 14681 transitions. [2021-05-03 13:53:10,901 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 14681 transitions. Word has length 22 [2021-05-03 13:53:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:10,901 INFO L480 AbstractCegarLoop]: Abstraction has 4708 states and 14681 transitions. [2021-05-03 13:53:10,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 14681 transitions. [2021-05-03 13:53:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:10,906 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:10,906 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:11,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-03 13:53:11,107 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1088121581, now seen corresponding path program 253 times [2021-05-03 13:53:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:11,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535841611] [2021-05-03 13:53:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:11,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535841611] [2021-05-03 13:53:11,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247009484] [2021-05-03 13:53:11,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:11,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:11,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:11,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:11,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-05-03 13:53:11,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431997335] [2021-05-03 13:53:11,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:11,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:11,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:11,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:11,392 INFO L87 Difference]: Start difference. First operand 4708 states and 14681 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:12,397 INFO L93 Difference]: Finished difference Result 5582 states and 16822 transitions. [2021-05-03 13:53:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 13:53:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:12,405 INFO L225 Difference]: With dead ends: 5582 [2021-05-03 13:53:12,405 INFO L226 Difference]: Without dead ends: 5564 [2021-05-03 13:53:12,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=1406, Invalid=3286, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:53:12,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-05-03 13:53:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4728. [2021-05-03 13:53:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 4727 states have (on average 3.119737677173683) internal successors, (14747), 4727 states have internal predecessors, (14747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 14747 transitions. [2021-05-03 13:53:12,478 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 14747 transitions. Word has length 22 [2021-05-03 13:53:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:12,478 INFO L480 AbstractCegarLoop]: Abstraction has 4728 states and 14747 transitions. [2021-05-03 13:53:12,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 14747 transitions. [2021-05-03 13:53:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:12,483 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:12,483 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:12,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-05-03 13:53:12,685 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:12,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1165777525, now seen corresponding path program 254 times [2021-05-03 13:53:12,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:12,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960209538] [2021-05-03 13:53:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:12,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960209538] [2021-05-03 13:53:12,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760573808] [2021-05-03 13:53:12,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:12,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:12,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:12,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:12,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-03 13:53:12,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170233638] [2021-05-03 13:53:12,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:12,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:12,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:12,956 INFO L87 Difference]: Start difference. First operand 4728 states and 14747 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:13,723 INFO L93 Difference]: Finished difference Result 5063 states and 15470 transitions. [2021-05-03 13:53:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:53:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:13,729 INFO L225 Difference]: With dead ends: 5063 [2021-05-03 13:53:13,729 INFO L226 Difference]: Without dead ends: 5063 [2021-05-03 13:53:13,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=1006, Invalid=2416, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 13:53:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-05-03 13:53:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 4692. [2021-05-03 13:53:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4691 states have (on average 3.118311660626732) internal successors, (14628), 4691 states have internal predecessors, (14628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 14628 transitions. [2021-05-03 13:53:13,779 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 14628 transitions. Word has length 22 [2021-05-03 13:53:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:13,779 INFO L480 AbstractCegarLoop]: Abstraction has 4692 states and 14628 transitions. [2021-05-03 13:53:13,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 14628 transitions. [2021-05-03 13:53:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:13,784 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:13,785 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:13,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-05-03 13:53:13,988 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1392690059, now seen corresponding path program 255 times [2021-05-03 13:53:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:13,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096273449] [2021-05-03 13:53:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:14,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096273449] [2021-05-03 13:53:14,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391061761] [2021-05-03 13:53:14,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:14,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:53:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-05-03 13:53:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118219398] [2021-05-03 13:53:14,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:14,286 INFO L87 Difference]: Start difference. First operand 4692 states and 14628 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:15,174 INFO L93 Difference]: Finished difference Result 5220 states and 15784 transitions. [2021-05-03 13:53:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:53:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:15,182 INFO L225 Difference]: With dead ends: 5220 [2021-05-03 13:53:15,182 INFO L226 Difference]: Without dead ends: 5210 [2021-05-03 13:53:15,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=809, Invalid=1947, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:53:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5210 states. [2021-05-03 13:53:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5210 to 4589. [2021-05-03 13:53:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4589 states, 4588 states have (on average 3.1200959023539667) internal successors, (14315), 4588 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4589 states to 4589 states and 14315 transitions. [2021-05-03 13:53:15,251 INFO L78 Accepts]: Start accepts. Automaton has 4589 states and 14315 transitions. Word has length 22 [2021-05-03 13:53:15,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:15,251 INFO L480 AbstractCegarLoop]: Abstraction has 4589 states and 14315 transitions. [2021-05-03 13:53:15,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4589 states and 14315 transitions. [2021-05-03 13:53:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:15,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:15,258 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:15,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-05-03 13:53:15,461 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:15,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579275, now seen corresponding path program 256 times [2021-05-03 13:53:15,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:15,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082116343] [2021-05-03 13:53:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082116343] [2021-05-03 13:53:15,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131810137] [2021-05-03 13:53:15,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:15,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:15,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:15,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 13:53:15,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505842182] [2021-05-03 13:53:15,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:15,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:15,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:15,694 INFO L87 Difference]: Start difference. First operand 4589 states and 14315 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:16,428 INFO L93 Difference]: Finished difference Result 5724 states and 17179 transitions. [2021-05-03 13:53:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:53:16,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:16,437 INFO L225 Difference]: With dead ends: 5724 [2021-05-03 13:53:16,437 INFO L226 Difference]: Without dead ends: 5718 [2021-05-03 13:53:16,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=801, Invalid=1749, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:53:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5718 states. [2021-05-03 13:53:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5718 to 4609. [2021-05-03 13:53:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4608 states have (on average 3.118923611111111) internal successors, (14372), 4608 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 14372 transitions. [2021-05-03 13:53:16,507 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 14372 transitions. Word has length 22 [2021-05-03 13:53:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:16,507 INFO L480 AbstractCegarLoop]: Abstraction has 4609 states and 14372 transitions. [2021-05-03 13:53:16,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 14372 transitions. [2021-05-03 13:53:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:16,513 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:16,513 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:16,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:16,713 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:16,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1999207541, now seen corresponding path program 257 times [2021-05-03 13:53:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:16,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704348817] [2021-05-03 13:53:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:16,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704348817] [2021-05-03 13:53:16,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975813251] [2021-05-03 13:53:16,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:16,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:53:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:16,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:16,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 13:53:16,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50105373] [2021-05-03 13:53:16,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:16,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:16,981 INFO L87 Difference]: Start difference. First operand 4609 states and 14372 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:17,753 INFO L93 Difference]: Finished difference Result 6302 states and 18942 transitions. [2021-05-03 13:53:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:53:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:17,761 INFO L225 Difference]: With dead ends: 6302 [2021-05-03 13:53:17,761 INFO L226 Difference]: Without dead ends: 6300 [2021-05-03 13:53:17,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 661.3ms TimeCoverageRelationStatistics Valid=834, Invalid=1616, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:53:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-05-03 13:53:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4905. [2021-05-03 13:53:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.1176590538336053) internal successors, (15289), 4904 states have internal predecessors, (15289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 15289 transitions. [2021-05-03 13:53:17,836 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 15289 transitions. Word has length 22 [2021-05-03 13:53:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:17,836 INFO L480 AbstractCegarLoop]: Abstraction has 4905 states and 15289 transitions. [2021-05-03 13:53:17,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 15289 transitions. [2021-05-03 13:53:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:17,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:17,841 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:18,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:18,042 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 534521227, now seen corresponding path program 258 times [2021-05-03 13:53:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:18,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322139450] [2021-05-03 13:53:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:18,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322139450] [2021-05-03 13:53:18,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552287801] [2021-05-03 13:53:18,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:18,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:53:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:18,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:18,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 13:53:18,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585325951] [2021-05-03 13:53:18,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:18,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:18,254 INFO L87 Difference]: Start difference. First operand 4905 states and 15289 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:18,965 INFO L93 Difference]: Finished difference Result 6307 states and 18845 transitions. [2021-05-03 13:53:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:53:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:18,972 INFO L225 Difference]: With dead ends: 6307 [2021-05-03 13:53:18,972 INFO L226 Difference]: Without dead ends: 6307 [2021-05-03 13:53:18,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=966, Invalid=1686, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:53:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-05-03 13:53:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 5098. [2021-05-03 13:53:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5097 states have (on average 3.1271336080047085) internal successors, (15939), 5097 states have internal predecessors, (15939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 15939 transitions. [2021-05-03 13:53:19,033 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 15939 transitions. Word has length 22 [2021-05-03 13:53:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:19,033 INFO L480 AbstractCegarLoop]: Abstraction has 5098 states and 15939 transitions. [2021-05-03 13:53:19,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 15939 transitions. [2021-05-03 13:53:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:19,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:19,038 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:19,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:19,238 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1105976033, now seen corresponding path program 259 times [2021-05-03 13:53:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:19,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407787715] [2021-05-03 13:53:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:19,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407787715] [2021-05-03 13:53:19,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397150608] [2021-05-03 13:53:19,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:19,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:19,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:19,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:19,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-05-03 13:53:19,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29899433] [2021-05-03 13:53:19,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:19,544 INFO L87 Difference]: Start difference. First operand 5098 states and 15939 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:20,669 INFO L93 Difference]: Finished difference Result 6203 states and 18588 transitions. [2021-05-03 13:53:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:53:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:20,677 INFO L225 Difference]: With dead ends: 6203 [2021-05-03 13:53:20,677 INFO L226 Difference]: Without dead ends: 6194 [2021-05-03 13:53:20,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1024.4ms TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 13:53:20,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-05-03 13:53:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 5023. [2021-05-03 13:53:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 3.122859418558343) internal successors, (15683), 5022 states have internal predecessors, (15683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 15683 transitions. [2021-05-03 13:53:20,743 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 15683 transitions. Word has length 22 [2021-05-03 13:53:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:20,743 INFO L480 AbstractCegarLoop]: Abstraction has 5023 states and 15683 transitions. [2021-05-03 13:53:20,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 15683 transitions. [2021-05-03 13:53:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:20,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:20,749 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:20,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:20,949 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1641205835, now seen corresponding path program 260 times [2021-05-03 13:53:20,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:20,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805862515] [2021-05-03 13:53:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:21,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805862515] [2021-05-03 13:53:21,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622033135] [2021-05-03 13:53:21,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:21,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:21,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:21,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 13:53:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916108579] [2021-05-03 13:53:21,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:21,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:21,228 INFO L87 Difference]: Start difference. First operand 5023 states and 15683 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:22,466 INFO L93 Difference]: Finished difference Result 6188 states and 18528 transitions. [2021-05-03 13:53:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:53:22,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:22,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:22,476 INFO L225 Difference]: With dead ends: 6188 [2021-05-03 13:53:22,476 INFO L226 Difference]: Without dead ends: 6176 [2021-05-03 13:53:22,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 1068.0ms TimeCoverageRelationStatistics Valid=1503, Invalid=3609, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:53:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-05-03 13:53:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 5007. [2021-05-03 13:53:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 3.1220535357570913) internal successors, (15629), 5006 states have internal predecessors, (15629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 15629 transitions. [2021-05-03 13:53:22,548 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 15629 transitions. Word has length 22 [2021-05-03 13:53:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:22,548 INFO L480 AbstractCegarLoop]: Abstraction has 5007 states and 15629 transitions. [2021-05-03 13:53:22,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 15629 transitions. [2021-05-03 13:53:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:22,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:22,554 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:22,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-03 13:53:22,755 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1053460513, now seen corresponding path program 261 times [2021-05-03 13:53:22,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:22,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047631993] [2021-05-03 13:53:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047631993] [2021-05-03 13:53:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810649655] [2021-05-03 13:53:22,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:22,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:53:22,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:22,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:23,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:23,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-05-03 13:53:23,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176307453] [2021-05-03 13:53:23,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:23,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:23,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:23,046 INFO L87 Difference]: Start difference. First operand 5007 states and 15629 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:24,026 INFO L93 Difference]: Finished difference Result 6237 states and 18671 transitions. [2021-05-03 13:53:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:53:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:24,034 INFO L225 Difference]: With dead ends: 6237 [2021-05-03 13:53:24,034 INFO L226 Difference]: Without dead ends: 6219 [2021-05-03 13:53:24,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=1373, Invalid=3457, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:53:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2021-05-03 13:53:24,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5025. [2021-05-03 13:53:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 5024 states have (on average 3.1240047770700636) internal successors, (15695), 5024 states have internal predecessors, (15695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 15695 transitions. [2021-05-03 13:53:24,100 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 15695 transitions. Word has length 22 [2021-05-03 13:53:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:24,100 INFO L480 AbstractCegarLoop]: Abstraction has 5025 states and 15695 transitions. [2021-05-03 13:53:24,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 15695 transitions. [2021-05-03 13:53:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:24,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:24,105 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:24,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-05-03 13:53:24,306 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash 13224715, now seen corresponding path program 262 times [2021-05-03 13:53:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:24,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495447347] [2021-05-03 13:53:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:24,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495447347] [2021-05-03 13:53:24,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169808981] [2021-05-03 13:53:24,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:24,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:24,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:24,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:24,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-05-03 13:53:24,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881174602] [2021-05-03 13:53:24,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:24,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:24,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:24,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:24,554 INFO L87 Difference]: Start difference. First operand 5025 states and 15695 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:25,487 INFO L93 Difference]: Finished difference Result 6089 states and 18341 transitions. [2021-05-03 13:53:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 13:53:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:25,497 INFO L225 Difference]: With dead ends: 6089 [2021-05-03 13:53:25,497 INFO L226 Difference]: Without dead ends: 6065 [2021-05-03 13:53:25,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=1314, Invalid=3378, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:53:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-05-03 13:53:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 5048. [2021-05-03 13:53:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5048 states, 5047 states have (on average 3.125619179710719) internal successors, (15775), 5047 states have internal predecessors, (15775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5048 states to 5048 states and 15775 transitions. [2021-05-03 13:53:25,574 INFO L78 Accepts]: Start accepts. Automaton has 5048 states and 15775 transitions. Word has length 22 [2021-05-03 13:53:25,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:25,574 INFO L480 AbstractCegarLoop]: Abstraction has 5048 states and 15775 transitions. [2021-05-03 13:53:25,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5048 states and 15775 transitions. [2021-05-03 13:53:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:25,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:25,580 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:25,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-05-03 13:53:25,781 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash 51612887, now seen corresponding path program 263 times [2021-05-03 13:53:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966725747] [2021-05-03 13:53:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:25,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966725747] [2021-05-03 13:53:25,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8835174] [2021-05-03 13:53:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:25,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:53:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:26,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:26,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 13:53:26,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765540135] [2021-05-03 13:53:26,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:53:26,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:53:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:26,091 INFO L87 Difference]: Start difference. First operand 5048 states and 15775 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:26,913 INFO L93 Difference]: Finished difference Result 5685 states and 17310 transitions. [2021-05-03 13:53:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:53:26,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:26,921 INFO L225 Difference]: With dead ends: 5685 [2021-05-03 13:53:26,921 INFO L226 Difference]: Without dead ends: 5685 [2021-05-03 13:53:26,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 755.7ms TimeCoverageRelationStatistics Valid=1082, Invalid=2700, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 13:53:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-05-03 13:53:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5099. [2021-05-03 13:53:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 3.1196547665751275) internal successors, (15904), 5098 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 15904 transitions. [2021-05-03 13:53:26,986 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 15904 transitions. Word has length 22 [2021-05-03 13:53:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 5099 states and 15904 transitions. [2021-05-03 13:53:26,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 15904 transitions. [2021-05-03 13:53:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:26,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:26,992 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:27,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-05-03 13:53:27,192 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:27,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -550327729, now seen corresponding path program 264 times [2021-05-03 13:53:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:27,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258164109] [2021-05-03 13:53:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:27,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258164109] [2021-05-03 13:53:27,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692559952] [2021-05-03 13:53:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:27,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:53:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:27,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:27,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:27,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:27,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-05-03 13:53:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531538927] [2021-05-03 13:53:27,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:27,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:27,496 INFO L87 Difference]: Start difference. First operand 5099 states and 15904 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:28,262 INFO L93 Difference]: Finished difference Result 6196 states and 18689 transitions. [2021-05-03 13:53:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:53:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:28,271 INFO L225 Difference]: With dead ends: 6196 [2021-05-03 13:53:28,271 INFO L226 Difference]: Without dead ends: 6196 [2021-05-03 13:53:28,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 688.5ms TimeCoverageRelationStatistics Valid=846, Invalid=2124, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 13:53:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2021-05-03 13:53:28,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 5243. [2021-05-03 13:53:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 3.119420068676078) internal successors, (16352), 5242 states have internal predecessors, (16352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 16352 transitions. [2021-05-03 13:53:28,355 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 16352 transitions. Word has length 22 [2021-05-03 13:53:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:28,355 INFO L480 AbstractCegarLoop]: Abstraction has 5243 states and 16352 transitions. [2021-05-03 13:53:28,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 16352 transitions. [2021-05-03 13:53:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:28,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:28,362 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:28,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-03 13:53:28,562 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:28,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1401029161, now seen corresponding path program 265 times [2021-05-03 13:53:28,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:28,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901763059] [2021-05-03 13:53:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:28,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901763059] [2021-05-03 13:53:28,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589409975] [2021-05-03 13:53:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:28,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:28,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:28,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-05-03 13:53:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492847184] [2021-05-03 13:53:28,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:28,867 INFO L87 Difference]: Start difference. First operand 5243 states and 16352 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:29,774 INFO L93 Difference]: Finished difference Result 6611 states and 19949 transitions. [2021-05-03 13:53:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:53:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:29,784 INFO L225 Difference]: With dead ends: 6611 [2021-05-03 13:53:29,784 INFO L226 Difference]: Without dead ends: 6611 [2021-05-03 13:53:29,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 717.7ms TimeCoverageRelationStatistics Valid=827, Invalid=1929, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:53:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6611 states. [2021-05-03 13:53:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6611 to 5413. [2021-05-03 13:53:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5413 states, 5412 states have (on average 3.1225055432372506) internal successors, (16899), 5412 states have internal predecessors, (16899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5413 states to 5413 states and 16899 transitions. [2021-05-03 13:53:29,859 INFO L78 Accepts]: Start accepts. Automaton has 5413 states and 16899 transitions. Word has length 22 [2021-05-03 13:53:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:29,859 INFO L480 AbstractCegarLoop]: Abstraction has 5413 states and 16899 transitions. [2021-05-03 13:53:29,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5413 states and 16899 transitions. [2021-05-03 13:53:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:29,865 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:29,865 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:30,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-05-03 13:53:30,066 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 372644175, now seen corresponding path program 266 times [2021-05-03 13:53:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:30,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542064491] [2021-05-03 13:53:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542064491] [2021-05-03 13:53:30,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478313128] [2021-05-03 13:53:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:30,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:30,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:30,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:30,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-05-03 13:53:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351826934] [2021-05-03 13:53:30,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:30,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:30,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:30,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:30,364 INFO L87 Difference]: Start difference. First operand 5413 states and 16899 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:31,250 INFO L93 Difference]: Finished difference Result 7182 states and 21641 transitions. [2021-05-03 13:53:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:53:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:31,260 INFO L225 Difference]: With dead ends: 7182 [2021-05-03 13:53:31,260 INFO L226 Difference]: Without dead ends: 7182 [2021-05-03 13:53:31,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=864, Invalid=1788, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:53:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2021-05-03 13:53:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5709. [2021-05-03 13:53:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.128416257883672) internal successors, (17857), 5708 states have internal predecessors, (17857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17857 transitions. [2021-05-03 13:53:31,378 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17857 transitions. Word has length 22 [2021-05-03 13:53:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:31,378 INFO L480 AbstractCegarLoop]: Abstraction has 5709 states and 17857 transitions. [2021-05-03 13:53:31,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17857 transitions. [2021-05-03 13:53:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:31,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:31,385 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:31,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:31,589 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash -539971881, now seen corresponding path program 267 times [2021-05-03 13:53:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:31,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737071742] [2021-05-03 13:53:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:31,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737071742] [2021-05-03 13:53:31,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795792380] [2021-05-03 13:53:31,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:31,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:53:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:31,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:31,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:31,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-05-03 13:53:31,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618432142] [2021-05-03 13:53:31,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:31,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:31,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:31,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:31,804 INFO L87 Difference]: Start difference. First operand 5709 states and 17857 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:32,569 INFO L93 Difference]: Finished difference Result 8455 states and 25540 transitions. [2021-05-03 13:53:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:53:32,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:32,581 INFO L225 Difference]: With dead ends: 8455 [2021-05-03 13:53:32,581 INFO L226 Difference]: Without dead ends: 8455 [2021-05-03 13:53:32,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=950, Invalid=1702, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 13:53:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-05-03 13:53:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 6970. [2021-05-03 13:53:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6970 states, 6969 states have (on average 3.147366910604104) internal successors, (21934), 6969 states have internal predecessors, (21934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6970 states to 6970 states and 21934 transitions. [2021-05-03 13:53:32,690 INFO L78 Accepts]: Start accepts. Automaton has 6970 states and 21934 transitions. Word has length 22 [2021-05-03 13:53:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:32,690 INFO L480 AbstractCegarLoop]: Abstraction has 6970 states and 21934 transitions. [2021-05-03 13:53:32,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6970 states and 21934 transitions. [2021-05-03 13:53:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:32,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:32,699 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:32,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-03 13:53:32,900 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash 31482925, now seen corresponding path program 268 times [2021-05-03 13:53:32,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:32,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628833153] [2021-05-03 13:53:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628833153] [2021-05-03 13:53:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885201295] [2021-05-03 13:53:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:32,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:32,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:32,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:33,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:33,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-05-03 13:53:33,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998552498] [2021-05-03 13:53:33,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:53:33,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:33,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:53:33,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:53:33,183 INFO L87 Difference]: Start difference. First operand 6970 states and 21934 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:34,784 INFO L93 Difference]: Finished difference Result 8123 states and 24573 transitions. [2021-05-03 13:53:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 13:53:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:34,796 INFO L225 Difference]: With dead ends: 8123 [2021-05-03 13:53:34,796 INFO L226 Difference]: Without dead ends: 8117 [2021-05-03 13:53:34,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 1369.9ms TimeCoverageRelationStatistics Valid=1939, Invalid=4703, Unknown=0, NotChecked=0, Total=6642 [2021-05-03 13:53:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-05-03 13:53:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6930. [2021-05-03 13:53:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 3.1440323278972433) internal successors, (21785), 6929 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 21785 transitions. [2021-05-03 13:53:34,918 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 21785 transitions. Word has length 22 [2021-05-03 13:53:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 6930 states and 21785 transitions. [2021-05-03 13:53:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:34,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 21785 transitions. [2021-05-03 13:53:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:34,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:34,927 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:35,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:35,128 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 566712727, now seen corresponding path program 269 times [2021-05-03 13:53:35,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:35,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959758959] [2021-05-03 13:53:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959758959] [2021-05-03 13:53:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095794344] [2021-05-03 13:53:35,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:35,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:53:35,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:35,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-05-03 13:53:35,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313433022] [2021-05-03 13:53:35,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:35,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:35,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:35,402 INFO L87 Difference]: Start difference. First operand 6930 states and 21785 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:36,674 INFO L93 Difference]: Finished difference Result 8123 states and 24622 transitions. [2021-05-03 13:53:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:53:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:36,684 INFO L225 Difference]: With dead ends: 8123 [2021-05-03 13:53:36,684 INFO L226 Difference]: Without dead ends: 8111 [2021-05-03 13:53:36,685 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=1649, Invalid=4203, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 13:53:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-05-03 13:53:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 6927. [2021-05-03 13:53:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6927 states, 6926 states have (on average 3.1453941669073058) internal successors, (21785), 6926 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6927 states to 6927 states and 21785 transitions. [2021-05-03 13:53:36,795 INFO L78 Accepts]: Start accepts. Automaton has 6927 states and 21785 transitions. Word has length 22 [2021-05-03 13:53:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:36,795 INFO L480 AbstractCegarLoop]: Abstraction has 6927 states and 21785 transitions. [2021-05-03 13:53:36,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 6927 states and 21785 transitions. [2021-05-03 13:53:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:36,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:36,805 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:37,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:37,013 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:37,013 INFO L82 PathProgramCache]: Analyzing trace with hash -21032595, now seen corresponding path program 270 times [2021-05-03 13:53:37,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:37,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63021329] [2021-05-03 13:53:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63021329] [2021-05-03 13:53:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142830186] [2021-05-03 13:53:37,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:37,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:53:37,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:37,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:37,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:37,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-05-03 13:53:37,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624261373] [2021-05-03 13:53:37,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:37,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:37,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:37,267 INFO L87 Difference]: Start difference. First operand 6927 states and 21785 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:38,485 INFO L93 Difference]: Finished difference Result 8230 states and 24962 transitions. [2021-05-03 13:53:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 13:53:38,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:38,498 INFO L225 Difference]: With dead ends: 8230 [2021-05-03 13:53:38,498 INFO L226 Difference]: Without dead ends: 8212 [2021-05-03 13:53:38,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1065.3ms TimeCoverageRelationStatistics Valid=1425, Invalid=3831, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 13:53:38,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2021-05-03 13:53:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7085. [2021-05-03 13:53:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.148927159796725) internal successors, (22307), 7084 states have internal predecessors, (22307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 22307 transitions. [2021-05-03 13:53:38,615 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 22307 transitions. Word has length 22 [2021-05-03 13:53:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:38,615 INFO L480 AbstractCegarLoop]: Abstraction has 7085 states and 22307 transitions. [2021-05-03 13:53:38,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 22307 transitions. [2021-05-03 13:53:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:38,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:38,625 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:38,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:38,825 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:38,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:38,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1061268393, now seen corresponding path program 271 times [2021-05-03 13:53:38,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:38,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975382112] [2021-05-03 13:53:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:38,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975382112] [2021-05-03 13:53:38,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240948017] [2021-05-03 13:53:38,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:39,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:39,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-05-03 13:53:39,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300025313] [2021-05-03 13:53:39,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:39,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:39,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:39,293 INFO L87 Difference]: Start difference. First operand 7085 states and 22307 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:40,305 INFO L93 Difference]: Finished difference Result 8473 states and 25731 transitions. [2021-05-03 13:53:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 13:53:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:40,317 INFO L225 Difference]: With dead ends: 8473 [2021-05-03 13:53:40,317 INFO L226 Difference]: Without dead ends: 8449 [2021-05-03 13:53:40,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1062.8ms TimeCoverageRelationStatistics Valid=1272, Invalid=3558, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:53:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8449 states. [2021-05-03 13:53:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8449 to 7305. [2021-05-03 13:53:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7305 states, 7304 states have (on average 3.1519715224534504) internal successors, (23022), 7304 states have internal predecessors, (23022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:40,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7305 states to 7305 states and 23022 transitions. [2021-05-03 13:53:40,423 INFO L78 Accepts]: Start accepts. Automaton has 7305 states and 23022 transitions. Word has length 22 [2021-05-03 13:53:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:40,423 INFO L480 AbstractCegarLoop]: Abstraction has 7305 states and 23022 transitions. [2021-05-03 13:53:40,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7305 states and 23022 transitions. [2021-05-03 13:53:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:53:40,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:40,431 INFO L551 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:40,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-05-03 13:53:40,632 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:40,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1051160237, now seen corresponding path program 272 times [2021-05-03 13:53:40,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516220372] [2021-05-03 13:53:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:40,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516220372] [2021-05-03 13:53:40,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222398878] [2021-05-03 13:53:40,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:40,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:53:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:40,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:40,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 13:53:40,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767862565] [2021-05-03 13:53:40,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:53:40,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:40,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:53:40,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:40,916 INFO L87 Difference]: Start difference. First operand 7305 states and 23022 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:41,889 INFO L93 Difference]: Finished difference Result 8382 states and 25614 transitions. [2021-05-03 13:53:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 13:53:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:53:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:41,904 INFO L225 Difference]: With dead ends: 8382 [2021-05-03 13:53:41,904 INFO L226 Difference]: Without dead ends: 8352 [2021-05-03 13:53:41,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 922.9ms TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:53:41,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8352 states. [2021-05-03 13:53:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8352 to 7353. [2021-05-03 13:53:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7353 states, 7352 states have (on average 3.1509793253536453) internal successors, (23166), 7352 states have internal predecessors, (23166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7353 states to 7353 states and 23166 transitions. [2021-05-03 13:53:42,057 INFO L78 Accepts]: Start accepts. Automaton has 7353 states and 23166 transitions. Word has length 22 [2021-05-03 13:53:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:42,057 INFO L480 AbstractCegarLoop]: Abstraction has 7353 states and 23166 transitions. [2021-05-03 13:53:42,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7353 states and 23166 transitions. [2021-05-03 13:53:42,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:42,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:42,068 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:42,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-05-03 13:53:42,268 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash -943740933, now seen corresponding path program 273 times [2021-05-03 13:53:42,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:42,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314598975] [2021-05-03 13:53:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:42,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314598975] [2021-05-03 13:53:42,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145655524] [2021-05-03 13:53:42,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:42,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:53:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:42,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:42,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:42,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971583167] [2021-05-03 13:53:42,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:42,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:42,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:42,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:42,841 INFO L87 Difference]: Start difference. First operand 7353 states and 23166 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:43,818 INFO L93 Difference]: Finished difference Result 7724 states and 23857 transitions. [2021-05-03 13:53:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:53:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:43,830 INFO L225 Difference]: With dead ends: 7724 [2021-05-03 13:53:43,830 INFO L226 Difference]: Without dead ends: 7695 [2021-05-03 13:53:43,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 711.3ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:53:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-05-03 13:53:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 7410. [2021-05-03 13:53:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.140099878526117) internal successors, (23265), 7409 states have internal predecessors, (23265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 23265 transitions. [2021-05-03 13:53:43,942 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 23265 transitions. Word has length 23 [2021-05-03 13:53:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:43,942 INFO L480 AbstractCegarLoop]: Abstraction has 7410 states and 23265 transitions. [2021-05-03 13:53:43,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 23265 transitions. [2021-05-03 13:53:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:43,952 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:43,952 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:44,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-05-03 13:53:44,152 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1733943489, now seen corresponding path program 274 times [2021-05-03 13:53:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:44,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237315147] [2021-05-03 13:53:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237315147] [2021-05-03 13:53:44,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359754939] [2021-05-03 13:53:44,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:44,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:44,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:44,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:44,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786222525] [2021-05-03 13:53:44,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:44,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:44,600 INFO L87 Difference]: Start difference. First operand 7410 states and 23265 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:45,050 INFO L93 Difference]: Finished difference Result 7815 states and 24110 transitions. [2021-05-03 13:53:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:53:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:45,062 INFO L225 Difference]: With dead ends: 7815 [2021-05-03 13:53:45,062 INFO L226 Difference]: Without dead ends: 7808 [2021-05-03 13:53:45,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2021-05-03 13:53:45,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 7508. [2021-05-03 13:53:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.1443985613427468) internal successors, (23605), 7507 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 23605 transitions. [2021-05-03 13:53:45,188 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 23605 transitions. Word has length 23 [2021-05-03 13:53:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:45,188 INFO L480 AbstractCegarLoop]: Abstraction has 7508 states and 23605 transitions. [2021-05-03 13:53:45,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 23605 transitions. [2021-05-03 13:53:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:45,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:45,198 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:45,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-05-03 13:53:45,408 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash -119240765, now seen corresponding path program 275 times [2021-05-03 13:53:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:45,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300977835] [2021-05-03 13:53:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300977835] [2021-05-03 13:53:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748161241] [2021-05-03 13:53:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:45,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:53:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:45,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:45,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988875445] [2021-05-03 13:53:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:45,873 INFO L87 Difference]: Start difference. First operand 7508 states and 23605 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:46,519 INFO L93 Difference]: Finished difference Result 7801 states and 24090 transitions. [2021-05-03 13:53:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:53:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:46,533 INFO L225 Difference]: With dead ends: 7801 [2021-05-03 13:53:46,533 INFO L226 Difference]: Without dead ends: 7785 [2021-05-03 13:53:46,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:53:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-05-03 13:53:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 7430. [2021-05-03 13:53:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-05-03 13:53:46,660 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-05-03 13:53:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:46,660 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-05-03 13:53:46,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-05-03 13:53:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:46,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:46,671 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:46,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:46,871 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:46,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1162488683, now seen corresponding path program 276 times [2021-05-03 13:53:46,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:46,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887100577] [2021-05-03 13:53:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:47,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887100577] [2021-05-03 13:53:47,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414726525] [2021-05-03 13:53:47,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:47,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:53:47,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:47,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:47,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:47,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462782951] [2021-05-03 13:53:47,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:47,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:47,458 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:48,133 INFO L93 Difference]: Finished difference Result 7734 states and 23848 transitions. [2021-05-03 13:53:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:53:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:48,145 INFO L225 Difference]: With dead ends: 7734 [2021-05-03 13:53:48,145 INFO L226 Difference]: Without dead ends: 7727 [2021-05-03 13:53:48,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 574.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:53:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-05-03 13:53:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7430. [2021-05-03 13:53:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-05-03 13:53:48,247 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-05-03 13:53:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:48,247 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-05-03 13:53:48,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-05-03 13:53:48,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:48,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:48,257 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:48,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:48,457 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash -627258881, now seen corresponding path program 277 times [2021-05-03 13:53:48,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:48,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778786607] [2021-05-03 13:53:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:48,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778786607] [2021-05-03 13:53:48,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435618452] [2021-05-03 13:53:48,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:48,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:48,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:48,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951813367] [2021-05-03 13:53:48,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:48,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:48,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:48,993 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:49,568 INFO L93 Difference]: Finished difference Result 7751 states and 23873 transitions. [2021-05-03 13:53:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:53:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:49,579 INFO L225 Difference]: With dead ends: 7751 [2021-05-03 13:53:49,579 INFO L226 Difference]: Without dead ends: 7744 [2021-05-03 13:53:49,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 545.8ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:53:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7744 states. [2021-05-03 13:53:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7744 to 7430. [2021-05-03 13:53:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-05-03 13:53:49,685 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-05-03 13:53:49,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:49,685 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-05-03 13:53:49,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:49,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-05-03 13:53:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:49,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:49,694 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:49,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-05-03 13:53:49,895 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1215004203, now seen corresponding path program 278 times [2021-05-03 13:53:49,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:49,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411680698] [2021-05-03 13:53:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:50,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411680698] [2021-05-03 13:53:50,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546791366] [2021-05-03 13:53:50,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:50,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:50,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:50,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:50,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:50,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808122547] [2021-05-03 13:53:50,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:50,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:50,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:50,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:50,377 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:51,126 INFO L93 Difference]: Finished difference Result 7771 states and 23903 transitions. [2021-05-03 13:53:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:53:51,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:51,167 INFO L225 Difference]: With dead ends: 7771 [2021-05-03 13:53:51,167 INFO L226 Difference]: Without dead ends: 7764 [2021-05-03 13:53:51,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:53:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2021-05-03 13:53:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7430. [2021-05-03 13:53:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-05-03 13:53:51,269 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-05-03 13:53:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:51,269 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-05-03 13:53:51,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-05-03 13:53:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:51,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:51,278 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:51,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:51,479 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:51,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:51,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2039727295, now seen corresponding path program 279 times [2021-05-03 13:53:51,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:51,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987839594] [2021-05-03 13:53:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:51,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987839594] [2021-05-03 13:53:51,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270587997] [2021-05-03 13:53:51,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:51,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:53:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:52,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:52,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:53:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071378147] [2021-05-03 13:53:52,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:52,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:52,050 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:52,853 INFO L93 Difference]: Finished difference Result 7671 states and 23732 transitions. [2021-05-03 13:53:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:53:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:52,865 INFO L225 Difference]: With dead ends: 7671 [2021-05-03 13:53:52,865 INFO L226 Difference]: Without dead ends: 7664 [2021-05-03 13:53:52,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 671.8ms TimeCoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:53:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2021-05-03 13:53:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7430. [2021-05-03 13:53:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.142145645443532) internal successors, (23343), 7429 states have internal predecessors, (23343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 23343 transitions. [2021-05-03 13:53:52,977 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 23343 transitions. Word has length 23 [2021-05-03 13:53:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:52,978 INFO L480 AbstractCegarLoop]: Abstraction has 7430 states and 23343 transitions. [2021-05-03 13:53:52,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 23343 transitions. [2021-05-03 13:53:52,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:52,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:52,988 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:53,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:53,188 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:53,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1090073861, now seen corresponding path program 280 times [2021-05-03 13:53:53,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:53,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351302241] [2021-05-03 13:53:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351302241] [2021-05-03 13:53:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660595244] [2021-05-03 13:53:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:53,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:53,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:53,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:53:53,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971022523] [2021-05-03 13:53:53,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:53,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:53,664 INFO L87 Difference]: Start difference. First operand 7430 states and 23343 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:53,999 INFO L93 Difference]: Finished difference Result 7746 states and 24061 transitions. [2021-05-03 13:53:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:53:54,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:54,011 INFO L225 Difference]: With dead ends: 7746 [2021-05-03 13:53:54,012 INFO L226 Difference]: Without dead ends: 7739 [2021-05-03 13:53:54,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7739 states. [2021-05-03 13:53:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7739 to 7502. [2021-05-03 13:53:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1463804826023196) internal successors, (23601), 7501 states have internal predecessors, (23601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23601 transitions. [2021-05-03 13:53:54,153 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23601 transitions. Word has length 23 [2021-05-03 13:53:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:54,153 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23601 transitions. [2021-05-03 13:53:54,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23601 transitions. [2021-05-03 13:53:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:54,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:54,164 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:54,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-05-03 13:53:54,364 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 524628863, now seen corresponding path program 281 times [2021-05-03 13:53:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:54,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125466904] [2021-05-03 13:53:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:54,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125466904] [2021-05-03 13:53:54,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895951150] [2021-05-03 13:53:54,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:54,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:53:54,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:54,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:54,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:54,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:54,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:53:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632277824] [2021-05-03 13:53:54,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:54,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:54,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:54,985 INFO L87 Difference]: Start difference. First operand 7502 states and 23601 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:55,473 INFO L93 Difference]: Finished difference Result 7747 states and 24058 transitions. [2021-05-03 13:53:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:53:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:55,485 INFO L225 Difference]: With dead ends: 7747 [2021-05-03 13:53:55,485 INFO L226 Difference]: Without dead ends: 7738 [2021-05-03 13:53:55,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 600.7ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-05-03 13:53:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7502. [2021-05-03 13:53:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-05-03 13:53:55,594 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-05-03 13:53:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-05-03 13:53:55,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-05-03 13:53:55,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:55,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:55,604 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:55,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-03 13:53:55,804 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1554664965, now seen corresponding path program 282 times [2021-05-03 13:53:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:55,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354527996] [2021-05-03 13:53:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354527996] [2021-05-03 13:53:56,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016267999] [2021-05-03 13:53:56,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:56,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:53:56,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:56,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:56,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:53:56,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21084016] [2021-05-03 13:53:56,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:56,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:56,489 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:56,879 INFO L93 Difference]: Finished difference Result 7686 states and 23919 transitions. [2021-05-03 13:53:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:53:56,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:56,890 INFO L225 Difference]: With dead ends: 7686 [2021-05-03 13:53:56,890 INFO L226 Difference]: Without dead ends: 7679 [2021-05-03 13:53:56,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7679 states. [2021-05-03 13:53:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7679 to 7502. [2021-05-03 13:53:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 7501 states have (on average 3.1457139048126916) internal successors, (23596), 7501 states have internal predecessors, (23596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 23596 transitions. [2021-05-03 13:53:57,030 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 23596 transitions. Word has length 23 [2021-05-03 13:53:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:57,030 INFO L480 AbstractCegarLoop]: Abstraction has 7502 states and 23596 transitions. [2021-05-03 13:53:57,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 23596 transitions. [2021-05-03 13:53:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:57,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:57,040 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:57,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:57,241 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:57,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1690015423, now seen corresponding path program 283 times [2021-05-03 13:53:57,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:57,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733224791] [2021-05-03 13:53:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:57,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733224791] [2021-05-03 13:53:57,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686495921] [2021-05-03 13:53:57,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:57,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:57,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:57,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:57,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:53:57,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866954082] [2021-05-03 13:53:57,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:57,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:57,698 INFO L87 Difference]: Start difference. First operand 7502 states and 23596 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:58,155 INFO L93 Difference]: Finished difference Result 8082 states and 25035 transitions. [2021-05-03 13:53:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:53:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:58,168 INFO L225 Difference]: With dead ends: 8082 [2021-05-03 13:53:58,168 INFO L226 Difference]: Without dead ends: 8065 [2021-05-03 13:53:58,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:53:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-05-03 13:53:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7691. [2021-05-03 13:53:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.15370611183355) internal successors, (24252), 7690 states have internal predecessors, (24252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 24252 transitions. [2021-05-03 13:53:58,283 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 24252 transitions. Word has length 23 [2021-05-03 13:53:58,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:58,283 INFO L480 AbstractCegarLoop]: Abstraction has 7691 states and 24252 transitions. [2021-05-03 13:53:58,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 24252 transitions. [2021-05-03 13:53:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:58,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:58,294 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:58,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:58,495 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash -990249149, now seen corresponding path program 284 times [2021-05-03 13:53:58,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:58,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537482904] [2021-05-03 13:53:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537482904] [2021-05-03 13:53:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8391868] [2021-05-03 13:53:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:58,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:53:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:59,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:59,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:53:59,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035180244] [2021-05-03 13:53:59,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:53:59,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:53:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:53:59,123 INFO L87 Difference]: Start difference. First operand 7691 states and 24252 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:59,735 INFO L93 Difference]: Finished difference Result 8086 states and 25005 transitions. [2021-05-03 13:53:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:53:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:53:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:59,749 INFO L225 Difference]: With dead ends: 8086 [2021-05-03 13:53:59,749 INFO L226 Difference]: Without dead ends: 8068 [2021-05-03 13:53:59,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:53:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2021-05-03 13:53:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 7641. [2021-05-03 13:53:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7641 states, 7640 states have (on average 3.148167539267016) internal successors, (24052), 7640 states have internal predecessors, (24052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 24052 transitions. [2021-05-03 13:53:59,873 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 24052 transitions. Word has length 23 [2021-05-03 13:53:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:59,874 INFO L480 AbstractCegarLoop]: Abstraction has 7641 states and 24052 transitions. [2021-05-03 13:53:59,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 24052 transitions. [2021-05-03 13:53:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:53:59,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:59,883 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:00,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-05-03 13:54:00,083 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1225424319, now seen corresponding path program 285 times [2021-05-03 13:54:00,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:00,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282716286] [2021-05-03 13:54:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:00,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282716286] [2021-05-03 13:54:00,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446742248] [2021-05-03 13:54:00,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:00,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:54:00,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:00,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:00,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576914354] [2021-05-03 13:54:00,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:00,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:00,918 INFO L87 Difference]: Start difference. First operand 7641 states and 24052 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:01,515 INFO L93 Difference]: Finished difference Result 7976 states and 24675 transitions. [2021-05-03 13:54:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:54:01,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:01,527 INFO L225 Difference]: With dead ends: 7976 [2021-05-03 13:54:01,527 INFO L226 Difference]: Without dead ends: 7954 [2021-05-03 13:54:01,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 785.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-05-03 13:54:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7625. [2021-05-03 13:54:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-05-03 13:54:01,662 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-05-03 13:54:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:01,662 INFO L480 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-05-03 13:54:01,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-05-03 13:54:01,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:01,672 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:01,672 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:01,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:01,873 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:01,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1191825091, now seen corresponding path program 286 times [2021-05-03 13:54:01,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:01,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713710850] [2021-05-03 13:54:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:02,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713710850] [2021-05-03 13:54:02,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32726366] [2021-05-03 13:54:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:02,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:02,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:02,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:02,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:02,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631753241] [2021-05-03 13:54:02,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:02,366 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:02,805 INFO L93 Difference]: Finished difference Result 7875 states and 24443 transitions. [2021-05-03 13:54:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:54:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:02,816 INFO L225 Difference]: With dead ends: 7875 [2021-05-03 13:54:02,816 INFO L226 Difference]: Without dead ends: 7868 [2021-05-03 13:54:02,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 479.6ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:02,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2021-05-03 13:54:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7625. [2021-05-03 13:54:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7625 states, 7624 states have (on average 3.147560335781742) internal successors, (23997), 7624 states have internal predecessors, (23997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:02,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7625 states to 7625 states and 23997 transitions. [2021-05-03 13:54:02,910 INFO L78 Accepts]: Start accepts. Automaton has 7625 states and 23997 transitions. Word has length 23 [2021-05-03 13:54:02,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:02,910 INFO L480 AbstractCegarLoop]: Abstraction has 7625 states and 23997 transitions. [2021-05-03 13:54:02,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7625 states and 23997 transitions. [2021-05-03 13:54:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:02,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:02,918 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:03,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable493 [2021-05-03 13:54:03,118 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2075509483, now seen corresponding path program 287 times [2021-05-03 13:54:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:03,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534286403] [2021-05-03 13:54:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:03,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534286403] [2021-05-03 13:54:03,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115396826] [2021-05-03 13:54:03,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:03,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:54:03,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:03,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:03,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:03,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:03,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71669648] [2021-05-03 13:54:03,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:03,781 INFO L87 Difference]: Start difference. First operand 7625 states and 23997 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:04,323 INFO L93 Difference]: Finished difference Result 7842 states and 24373 transitions. [2021-05-03 13:54:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:54:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:04,337 INFO L225 Difference]: With dead ends: 7842 [2021-05-03 13:54:04,337 INFO L226 Difference]: Without dead ends: 7829 [2021-05-03 13:54:04,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7829 states. [2021-05-03 13:54:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7829 to 7608. [2021-05-03 13:54:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7608 states, 7607 states have (on average 3.1456553174707507) internal successors, (23929), 7607 states have internal predecessors, (23929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7608 states to 7608 states and 23929 transitions. [2021-05-03 13:54:04,467 INFO L78 Accepts]: Start accepts. Automaton has 7608 states and 23929 transitions. Word has length 23 [2021-05-03 13:54:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:04,467 INFO L480 AbstractCegarLoop]: Abstraction has 7608 states and 23929 transitions. [2021-05-03 13:54:04,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:04,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7608 states and 23929 transitions. [2021-05-03 13:54:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:04,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:04,478 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:04,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-05-03 13:54:04,679 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1973437307, now seen corresponding path program 288 times [2021-05-03 13:54:04,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:04,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612248476] [2021-05-03 13:54:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612248476] [2021-05-03 13:54:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411612899] [2021-05-03 13:54:04,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:05,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:54:05,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:05,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:05,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:05,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886695197] [2021-05-03 13:54:05,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:05,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:05,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:05,324 INFO L87 Difference]: Start difference. First operand 7608 states and 23929 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:05,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:05,834 INFO L93 Difference]: Finished difference Result 8242 states and 25517 transitions. [2021-05-03 13:54:05,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:54:05,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:05,848 INFO L225 Difference]: With dead ends: 8242 [2021-05-03 13:54:05,849 INFO L226 Difference]: Without dead ends: 8225 [2021-05-03 13:54:05,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8225 states. [2021-05-03 13:54:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8225 to 7836. [2021-05-03 13:54:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.1537970644543716) internal successors, (24710), 7835 states have internal predecessors, (24710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 24710 transitions. [2021-05-03 13:54:05,979 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 24710 transitions. Word has length 23 [2021-05-03 13:54:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:05,979 INFO L480 AbstractCegarLoop]: Abstraction has 7836 states and 24710 transitions. [2021-05-03 13:54:05,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 24710 transitions. [2021-05-03 13:54:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:05,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:05,989 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:06,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-05-03 13:54:06,190 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -706827265, now seen corresponding path program 289 times [2021-05-03 13:54:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:06,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670917324] [2021-05-03 13:54:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:06,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670917324] [2021-05-03 13:54:06,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623476430] [2021-05-03 13:54:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:06,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:06,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232561953] [2021-05-03 13:54:06,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:06,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:06,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:06,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:06,652 INFO L87 Difference]: Start difference. First operand 7836 states and 24710 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:07,098 INFO L93 Difference]: Finished difference Result 8244 states and 25471 transitions. [2021-05-03 13:54:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:54:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:07,112 INFO L225 Difference]: With dead ends: 8244 [2021-05-03 13:54:07,112 INFO L226 Difference]: Without dead ends: 8226 [2021-05-03 13:54:07,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-05-03 13:54:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 7776. [2021-05-03 13:54:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7776 states, 7775 states have (on average 3.1481672025723473) internal successors, (24477), 7775 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7776 states to 7776 states and 24477 transitions. [2021-05-03 13:54:07,244 INFO L78 Accepts]: Start accepts. Automaton has 7776 states and 24477 transitions. Word has length 23 [2021-05-03 13:54:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:07,244 INFO L480 AbstractCegarLoop]: Abstraction has 7776 states and 24477 transitions. [2021-05-03 13:54:07,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7776 states and 24477 transitions. [2021-05-03 13:54:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:07,255 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:07,255 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:07,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:07,456 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1508846203, now seen corresponding path program 290 times [2021-05-03 13:54:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391523329] [2021-05-03 13:54:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:07,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391523329] [2021-05-03 13:54:07,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827972871] [2021-05-03 13:54:07,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:08,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:08,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:08,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348251708] [2021-05-03 13:54:08,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:08,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:08,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:08,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:08,180 INFO L87 Difference]: Start difference. First operand 7776 states and 24477 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:08,985 INFO L93 Difference]: Finished difference Result 8185 states and 25224 transitions. [2021-05-03 13:54:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:08,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:08,998 INFO L225 Difference]: With dead ends: 8185 [2021-05-03 13:54:08,999 INFO L226 Difference]: Without dead ends: 8163 [2021-05-03 13:54:08,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 731.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-05-03 13:54:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 7750. [2021-05-03 13:54:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7749 states have (on average 3.145438121047877) internal successors, (24374), 7749 states have internal predecessors, (24374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 24374 transitions. [2021-05-03 13:54:09,120 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 24374 transitions. Word has length 23 [2021-05-03 13:54:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:09,120 INFO L480 AbstractCegarLoop]: Abstraction has 7750 states and 24374 transitions. [2021-05-03 13:54:09,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 24374 transitions. [2021-05-03 13:54:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:09,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:09,130 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:09,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:09,330 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:09,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1475246975, now seen corresponding path program 291 times [2021-05-03 13:54:09,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:09,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347135777] [2021-05-03 13:54:09,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:09,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347135777] [2021-05-03 13:54:09,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99945704] [2021-05-03 13:54:09,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:09,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:54:09,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:09,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:09,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:09,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:09,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570804474] [2021-05-03 13:54:09,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:09,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:09,945 INFO L87 Difference]: Start difference. First operand 7750 states and 24374 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:10,594 INFO L93 Difference]: Finished difference Result 8091 states and 24993 transitions. [2021-05-03 13:54:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:54:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:10,606 INFO L225 Difference]: With dead ends: 8091 [2021-05-03 13:54:10,606 INFO L226 Difference]: Without dead ends: 8065 [2021-05-03 13:54:10,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:54:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-05-03 13:54:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7731. [2021-05-03 13:54:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-05-03 13:54:10,716 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-05-03 13:54:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:10,716 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-05-03 13:54:10,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-05-03 13:54:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:10,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:10,725 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:10,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:10,925 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash 433670907, now seen corresponding path program 292 times [2021-05-03 13:54:10,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:10,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927142752] [2021-05-03 13:54:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:11,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927142752] [2021-05-03 13:54:11,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649411861] [2021-05-03 13:54:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:11,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:11,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:11,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:11,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:11,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:11,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751610617] [2021-05-03 13:54:11,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:11,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:11,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:11,400 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:11,997 INFO L93 Difference]: Finished difference Result 7972 states and 24730 transitions. [2021-05-03 13:54:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:11,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:12,007 INFO L225 Difference]: With dead ends: 7972 [2021-05-03 13:54:12,008 INFO L226 Difference]: Without dead ends: 7965 [2021-05-03 13:54:12,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-05-03 13:54:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7731. [2021-05-03 13:54:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7731 states, 7730 states have (on average 3.144890038809832) internal successors, (24310), 7730 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7731 states to 7731 states and 24310 transitions. [2021-05-03 13:54:12,114 INFO L78 Accepts]: Start accepts. Automaton has 7731 states and 24310 transitions. Word has length 23 [2021-05-03 13:54:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:12,114 INFO L480 AbstractCegarLoop]: Abstraction has 7731 states and 24310 transitions. [2021-05-03 13:54:12,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7731 states and 24310 transitions. [2021-05-03 13:54:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:12,124 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:12,124 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:12,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-05-03 13:54:12,324 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash -906289319, now seen corresponding path program 293 times [2021-05-03 13:54:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:12,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263239847] [2021-05-03 13:54:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263239847] [2021-05-03 13:54:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436738981] [2021-05-03 13:54:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:12,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:54:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:12,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:12,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:12,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751325959] [2021-05-03 13:54:12,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:12,970 INFO L87 Difference]: Start difference. First operand 7731 states and 24310 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:13,536 INFO L93 Difference]: Finished difference Result 7915 states and 24623 transitions. [2021-05-03 13:54:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:54:13,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:13,548 INFO L225 Difference]: With dead ends: 7915 [2021-05-03 13:54:13,549 INFO L226 Difference]: Without dead ends: 7902 [2021-05-03 13:54:13,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-05-03 13:54:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 7707. [2021-05-03 13:54:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7707 states, 7706 states have (on average 3.1418375291980274) internal successors, (24211), 7706 states have internal predecessors, (24211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7707 states to 7707 states and 24211 transitions. [2021-05-03 13:54:13,664 INFO L78 Accepts]: Start accepts. Automaton has 7707 states and 24211 transitions. Word has length 23 [2021-05-03 13:54:13,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:13,664 INFO L480 AbstractCegarLoop]: Abstraction has 7707 states and 24211 transitions. [2021-05-03 13:54:13,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7707 states and 24211 transitions. [2021-05-03 13:54:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:13,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:13,674 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:13,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-05-03 13:54:13,874 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2125386177, now seen corresponding path program 294 times [2021-05-03 13:54:13,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:13,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892544794] [2021-05-03 13:54:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:14,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892544794] [2021-05-03 13:54:14,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845274819] [2021-05-03 13:54:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:14,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:54:14,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:14,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:14,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:14,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:14,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34950460] [2021-05-03 13:54:14,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:14,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:14,516 INFO L87 Difference]: Start difference. First operand 7707 states and 24211 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:15,329 INFO L93 Difference]: Finished difference Result 8283 states and 25598 transitions. [2021-05-03 13:54:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:15,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:15,343 INFO L225 Difference]: With dead ends: 8283 [2021-05-03 13:54:15,343 INFO L226 Difference]: Without dead ends: 8266 [2021-05-03 13:54:15,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8266 states. [2021-05-03 13:54:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8266 to 7931. [2021-05-03 13:54:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.1479192938209333) internal successors, (24963), 7930 states have internal predecessors, (24963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 24963 transitions. [2021-05-03 13:54:15,481 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 24963 transitions. Word has length 23 [2021-05-03 13:54:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:15,481 INFO L480 AbstractCegarLoop]: Abstraction has 7931 states and 24963 transitions. [2021-05-03 13:54:15,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 24963 transitions. [2021-05-03 13:54:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:15,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:15,492 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:15,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:15,692 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash -510683453, now seen corresponding path program 295 times [2021-05-03 13:54:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:15,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743061314] [2021-05-03 13:54:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743061314] [2021-05-03 13:54:15,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398435084] [2021-05-03 13:54:15,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:15,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:15,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:16,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:16,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:16,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818748594] [2021-05-03 13:54:16,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:16,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:16,154 INFO L87 Difference]: Start difference. First operand 7931 states and 24963 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:16,663 INFO L93 Difference]: Finished difference Result 8281 states and 25535 transitions. [2021-05-03 13:54:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:16,675 INFO L225 Difference]: With dead ends: 8281 [2021-05-03 13:54:16,675 INFO L226 Difference]: Without dead ends: 8263 [2021-05-03 13:54:16,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-05-03 13:54:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7865. [2021-05-03 13:54:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 3.1434384537131232) internal successors, (24720), 7864 states have internal predecessors, (24720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 24720 transitions. [2021-05-03 13:54:16,800 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 24720 transitions. Word has length 23 [2021-05-03 13:54:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:16,800 INFO L480 AbstractCegarLoop]: Abstraction has 7865 states and 24720 transitions. [2021-05-03 13:54:16,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 24720 transitions. [2021-05-03 13:54:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:16,811 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:16,811 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:17,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-05-03 13:54:17,011 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1704990015, now seen corresponding path program 296 times [2021-05-03 13:54:17,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:17,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236866995] [2021-05-03 13:54:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:17,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236866995] [2021-05-03 13:54:17,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442227649] [2021-05-03 13:54:17,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:17,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:17,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:17,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:17,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893696669] [2021-05-03 13:54:17,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:17,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:17,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:17,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:17,647 INFO L87 Difference]: Start difference. First operand 7865 states and 24720 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:18,578 INFO L93 Difference]: Finished difference Result 8238 states and 25326 transitions. [2021-05-03 13:54:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:54:18,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:18,592 INFO L225 Difference]: With dead ends: 8238 [2021-05-03 13:54:18,592 INFO L226 Difference]: Without dead ends: 8216 [2021-05-03 13:54:18,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8216 states. [2021-05-03 13:54:18,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8216 to 7840. [2021-05-03 13:54:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7839 states have (on average 3.1408342900880215) internal successors, (24621), 7839 states have internal predecessors, (24621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 24621 transitions. [2021-05-03 13:54:18,722 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 24621 transitions. Word has length 23 [2021-05-03 13:54:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:18,722 INFO L480 AbstractCegarLoop]: Abstraction has 7840 states and 24621 transitions. [2021-05-03 13:54:18,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 24621 transitions. [2021-05-03 13:54:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:18,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:18,733 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:18,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-05-03 13:54:18,933 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1671390787, now seen corresponding path program 297 times [2021-05-03 13:54:18,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:18,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043301819] [2021-05-03 13:54:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:19,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043301819] [2021-05-03 13:54:19,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615914174] [2021-05-03 13:54:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:19,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:54:19,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874151453] [2021-05-03 13:54:19,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:19,603 INFO L87 Difference]: Start difference. First operand 7840 states and 24621 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:20,359 INFO L93 Difference]: Finished difference Result 8244 states and 25274 transitions. [2021-05-03 13:54:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:54:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:20,372 INFO L225 Difference]: With dead ends: 8244 [2021-05-03 13:54:20,372 INFO L226 Difference]: Without dead ends: 8218 [2021-05-03 13:54:20,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:54:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2021-05-03 13:54:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 7816. [2021-05-03 13:54:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7816 states, 7815 states have (on average 3.1396033269353807) internal successors, (24536), 7815 states have internal predecessors, (24536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7816 states to 7816 states and 24536 transitions. [2021-05-03 13:54:20,481 INFO L78 Accepts]: Start accepts. Automaton has 7816 states and 24536 transitions. Word has length 23 [2021-05-03 13:54:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:20,481 INFO L480 AbstractCegarLoop]: Abstraction has 7816 states and 24536 transitions. [2021-05-03 13:54:20,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 7816 states and 24536 transitions. [2021-05-03 13:54:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:20,490 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:20,491 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:20,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:20,691 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:20,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash 629814719, now seen corresponding path program 298 times [2021-05-03 13:54:20,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:20,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564012006] [2021-05-03 13:54:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564012006] [2021-05-03 13:54:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823400577] [2021-05-03 13:54:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:20,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:20,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:20,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:20,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:21,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:21,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:21,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182933903] [2021-05-03 13:54:21,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:21,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:21,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:21,154 INFO L87 Difference]: Start difference. First operand 7816 states and 24536 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:21,937 INFO L93 Difference]: Finished difference Result 8147 states and 25070 transitions. [2021-05-03 13:54:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:54:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:21,949 INFO L225 Difference]: With dead ends: 8147 [2021-05-03 13:54:21,949 INFO L226 Difference]: Without dead ends: 8117 [2021-05-03 13:54:21,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 574.5ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:54:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-05-03 13:54:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7795. [2021-05-03 13:54:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 3.1395945599178856) internal successors, (24470), 7794 states have internal predecessors, (24470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 24470 transitions. [2021-05-03 13:54:22,066 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 24470 transitions. Word has length 23 [2021-05-03 13:54:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:22,066 INFO L480 AbstractCegarLoop]: Abstraction has 7795 states and 24470 transitions. [2021-05-03 13:54:22,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 24470 transitions. [2021-05-03 13:54:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:22,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:22,076 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:22,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:22,277 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1594272317, now seen corresponding path program 299 times [2021-05-03 13:54:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:22,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154677908] [2021-05-03 13:54:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154677908] [2021-05-03 13:54:22,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180257044] [2021-05-03 13:54:22,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:22,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:54:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:22,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:22,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:22,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:54:22,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638540647] [2021-05-03 13:54:22,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:22,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:22,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:22,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:22,976 INFO L87 Difference]: Start difference. First operand 7795 states and 24470 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:24,005 INFO L93 Difference]: Finished difference Result 8028 states and 24837 transitions. [2021-05-03 13:54:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:54:24,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:24,018 INFO L225 Difference]: With dead ends: 8028 [2021-05-03 13:54:24,019 INFO L226 Difference]: Without dead ends: 8021 [2021-05-03 13:54:24,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 789.4ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:54:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-05-03 13:54:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7797. [2021-05-03 13:54:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 7796 states have (on average 3.1391739353514625) internal successors, (24473), 7796 states have internal predecessors, (24473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 24473 transitions. [2021-05-03 13:54:24,177 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 24473 transitions. Word has length 23 [2021-05-03 13:54:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:24,177 INFO L480 AbstractCegarLoop]: Abstraction has 7797 states and 24473 transitions. [2021-05-03 13:54:24,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 24473 transitions. [2021-05-03 13:54:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:24,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:24,187 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:24,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-05-03 13:54:24,387 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 979797397, now seen corresponding path program 300 times [2021-05-03 13:54:24,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:24,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959054590] [2021-05-03 13:54:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:24,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959054590] [2021-05-03 13:54:24,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876041927] [2021-05-03 13:54:24,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:24,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:54:24,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:24,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:24,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:24,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:24,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45522404] [2021-05-03 13:54:24,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:24,897 INFO L87 Difference]: Start difference. First operand 7797 states and 24473 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:25,250 INFO L93 Difference]: Finished difference Result 7916 states and 24667 transitions. [2021-05-03 13:54:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:54:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:25,261 INFO L225 Difference]: With dead ends: 7916 [2021-05-03 13:54:25,262 INFO L226 Difference]: Without dead ends: 7903 [2021-05-03 13:54:25,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7903 states. [2021-05-03 13:54:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7903 to 7773. [2021-05-03 13:54:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7773 states, 7772 states have (on average 3.139475038600103) internal successors, (24400), 7772 states have internal predecessors, (24400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7773 states to 7773 states and 24400 transitions. [2021-05-03 13:54:25,384 INFO L78 Accepts]: Start accepts. Automaton has 7773 states and 24400 transitions. Word has length 23 [2021-05-03 13:54:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:25,384 INFO L480 AbstractCegarLoop]: Abstraction has 7773 states and 24400 transitions. [2021-05-03 13:54:25,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7773 states and 24400 transitions. [2021-05-03 13:54:25,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:25,394 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:25,394 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:25,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-05-03 13:54:25,595 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:25,595 INFO L82 PathProgramCache]: Analyzing trace with hash -339895301, now seen corresponding path program 301 times [2021-05-03 13:54:25,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:25,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219417652] [2021-05-03 13:54:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219417652] [2021-05-03 13:54:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007237101] [2021-05-03 13:54:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:25,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:26,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:26,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807834800] [2021-05-03 13:54:26,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:26,026 INFO L87 Difference]: Start difference. First operand 7773 states and 24400 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:26,705 INFO L93 Difference]: Finished difference Result 8383 states and 25880 transitions. [2021-05-03 13:54:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:54:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:26,718 INFO L225 Difference]: With dead ends: 8383 [2021-05-03 13:54:26,719 INFO L226 Difference]: Without dead ends: 8366 [2021-05-03 13:54:26,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 497.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8366 states. [2021-05-03 13:54:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8366 to 8073. [2021-05-03 13:54:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.1385034687809714) internal successors, (25334), 8072 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 25334 transitions. [2021-05-03 13:54:26,854 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 25334 transitions. Word has length 23 [2021-05-03 13:54:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:26,855 INFO L480 AbstractCegarLoop]: Abstraction has 8073 states and 25334 transitions. [2021-05-03 13:54:26,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 25334 transitions. [2021-05-03 13:54:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:26,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:26,866 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:27,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable538 [2021-05-03 13:54:27,066 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1274807423, now seen corresponding path program 302 times [2021-05-03 13:54:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:27,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48267693] [2021-05-03 13:54:27,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:27,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48267693] [2021-05-03 13:54:27,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844224298] [2021-05-03 13:54:27,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:27,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:27,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:27,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:27,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273197302] [2021-05-03 13:54:27,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:27,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:27,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:27,717 INFO L87 Difference]: Start difference. First operand 8073 states and 25334 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:28,458 INFO L93 Difference]: Finished difference Result 8381 states and 25825 transitions. [2021-05-03 13:54:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:54:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:28,472 INFO L225 Difference]: With dead ends: 8381 [2021-05-03 13:54:28,473 INFO L226 Difference]: Without dead ends: 8365 [2021-05-03 13:54:28,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-05-03 13:54:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 8044. [2021-05-03 13:54:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.134526917816735) internal successors, (25211), 8043 states have internal predecessors, (25211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25211 transitions. [2021-05-03 13:54:28,595 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25211 transitions. Word has length 23 [2021-05-03 13:54:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:28,595 INFO L480 AbstractCegarLoop]: Abstraction has 8044 states and 25211 transitions. [2021-05-03 13:54:28,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25211 transitions. [2021-05-03 13:54:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:28,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:28,605 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:28,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-05-03 13:54:28,805 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -804486405, now seen corresponding path program 303 times [2021-05-03 13:54:28,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:28,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55313391] [2021-05-03 13:54:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:29,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55313391] [2021-05-03 13:54:29,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271433379] [2021-05-03 13:54:29,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:29,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:54:29,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:29,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:29,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:29,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:29,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997503164] [2021-05-03 13:54:29,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:29,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:29,494 INFO L87 Difference]: Start difference. First operand 8044 states and 25211 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:30,300 INFO L93 Difference]: Finished difference Result 8378 states and 25745 transitions. [2021-05-03 13:54:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:54:30,301 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:30,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:30,313 INFO L225 Difference]: With dead ends: 8378 [2021-05-03 13:54:30,313 INFO L226 Difference]: Without dead ends: 8360 [2021-05-03 13:54:30,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-05-03 13:54:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8008. [2021-05-03 13:54:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8008 states, 8007 states have (on average 3.129511677282378) internal successors, (25058), 8007 states have internal predecessors, (25058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8008 states to 8008 states and 25058 transitions. [2021-05-03 13:54:30,432 INFO L78 Accepts]: Start accepts. Automaton has 8008 states and 25058 transitions. Word has length 23 [2021-05-03 13:54:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:30,432 INFO L480 AbstractCegarLoop]: Abstraction has 8008 states and 25058 transitions. [2021-05-03 13:54:30,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 8008 states and 25058 transitions. [2021-05-03 13:54:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:30,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:30,442 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:30,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-05-03 13:54:30,642 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash -838085633, now seen corresponding path program 304 times [2021-05-03 13:54:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:30,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427305128] [2021-05-03 13:54:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427305128] [2021-05-03 13:54:30,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243204854] [2021-05-03 13:54:30,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:30,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:30,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:30,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:31,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:31,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160809810] [2021-05-03 13:54:31,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:31,093 INFO L87 Difference]: Start difference. First operand 8008 states and 25058 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:31,683 INFO L93 Difference]: Finished difference Result 8369 states and 25633 transitions. [2021-05-03 13:54:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:54:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:31,695 INFO L225 Difference]: With dead ends: 8369 [2021-05-03 13:54:31,695 INFO L226 Difference]: Without dead ends: 8349 [2021-05-03 13:54:31,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:54:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2021-05-03 13:54:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 7964. [2021-05-03 13:54:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 7963 states have (on average 3.126585457742057) internal successors, (24897), 7963 states have internal predecessors, (24897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 24897 transitions. [2021-05-03 13:54:31,844 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 24897 transitions. Word has length 23 [2021-05-03 13:54:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:31,844 INFO L480 AbstractCegarLoop]: Abstraction has 7964 states and 24897 transitions. [2021-05-03 13:54:31,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 24897 transitions. [2021-05-03 13:54:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:31,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:31,853 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:32,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-03 13:54:32,054 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1879661701, now seen corresponding path program 305 times [2021-05-03 13:54:32,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:32,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639649100] [2021-05-03 13:54:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:32,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639649100] [2021-05-03 13:54:32,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813988129] [2021-05-03 13:54:32,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:32,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:54:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:32,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:32,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:32,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338177624] [2021-05-03 13:54:32,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:32,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:32,623 INFO L87 Difference]: Start difference. First operand 7964 states and 24897 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:33,785 INFO L93 Difference]: Finished difference Result 8358 states and 25520 transitions. [2021-05-03 13:54:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:54:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:33,800 INFO L225 Difference]: With dead ends: 8358 [2021-05-03 13:54:33,800 INFO L226 Difference]: Without dead ends: 8336 [2021-05-03 13:54:33,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:54:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-05-03 13:54:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7922. [2021-05-03 13:54:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7922 states, 7921 states have (on average 3.1249842191642467) internal successors, (24753), 7921 states have internal predecessors, (24753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 24753 transitions. [2021-05-03 13:54:33,936 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 24753 transitions. Word has length 23 [2021-05-03 13:54:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:33,936 INFO L480 AbstractCegarLoop]: Abstraction has 7922 states and 24753 transitions. [2021-05-03 13:54:33,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 24753 transitions. [2021-05-03 13:54:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:33,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:33,946 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:34,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:34,147 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash 191218559, now seen corresponding path program 306 times [2021-05-03 13:54:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:34,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344696664] [2021-05-03 13:54:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:34,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344696664] [2021-05-03 13:54:34,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470642801] [2021-05-03 13:54:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:34,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:54:34,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:34,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:34,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:34,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964960399] [2021-05-03 13:54:34,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:34,837 INFO L87 Difference]: Start difference. First operand 7922 states and 24753 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:35,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:35,659 INFO L93 Difference]: Finished difference Result 8208 states and 25204 transitions. [2021-05-03 13:54:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:54:35,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:35,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:35,671 INFO L225 Difference]: With dead ends: 8208 [2021-05-03 13:54:35,671 INFO L226 Difference]: Without dead ends: 8184 [2021-05-03 13:54:35,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-05-03 13:54:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7881. [2021-05-03 13:54:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 3.1266497461928933) internal successors, (24638), 7880 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 24638 transitions. [2021-05-03 13:54:35,787 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 24638 transitions. Word has length 23 [2021-05-03 13:54:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:35,787 INFO L480 AbstractCegarLoop]: Abstraction has 7881 states and 24638 transitions. [2021-05-03 13:54:35,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 24638 transitions. [2021-05-03 13:54:35,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:35,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:35,797 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:35,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-05-03 13:54:35,998 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash -36002821, now seen corresponding path program 307 times [2021-05-03 13:54:35,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:35,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283276288] [2021-05-03 13:54:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283276288] [2021-05-03 13:54:36,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071534979] [2021-05-03 13:54:36,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:36,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:36,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-05-03 13:54:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017767456] [2021-05-03 13:54:36,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:36,533 INFO L87 Difference]: Start difference. First operand 7881 states and 24638 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:37,537 INFO L93 Difference]: Finished difference Result 8087 states and 24955 transitions. [2021-05-03 13:54:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:54:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:37,550 INFO L225 Difference]: With dead ends: 8087 [2021-05-03 13:54:37,550 INFO L226 Difference]: Without dead ends: 8080 [2021-05-03 13:54:37,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 628.6ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:54:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2021-05-03 13:54:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 7893. [2021-05-03 13:54:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7892 states have (on average 3.124176381145464) internal successors, (24656), 7892 states have internal predecessors, (24656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 24656 transitions. [2021-05-03 13:54:37,670 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 24656 transitions. Word has length 23 [2021-05-03 13:54:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:37,670 INFO L480 AbstractCegarLoop]: Abstraction has 7893 states and 24656 transitions. [2021-05-03 13:54:37,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:37,671 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 24656 transitions. [2021-05-03 13:54:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:37,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:37,680 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:37,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:37,881 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1252511357, now seen corresponding path program 308 times [2021-05-03 13:54:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:37,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70329364] [2021-05-03 13:54:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:38,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70329364] [2021-05-03 13:54:38,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971070365] [2021-05-03 13:54:38,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:38,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:38,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:38,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:38,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:38,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678556149] [2021-05-03 13:54:38,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:38,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:38,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:38,668 INFO L87 Difference]: Start difference. First operand 7893 states and 24656 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:39,285 INFO L93 Difference]: Finished difference Result 8261 states and 25496 transitions. [2021-05-03 13:54:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:54:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:39,300 INFO L225 Difference]: With dead ends: 8261 [2021-05-03 13:54:39,300 INFO L226 Difference]: Without dead ends: 8251 [2021-05-03 13:54:39,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-05-03 13:54:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 7953. [2021-05-03 13:54:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7952 states have (on average 3.1281438631790746) internal successors, (24875), 7952 states have internal predecessors, (24875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 24875 transitions. [2021-05-03 13:54:39,432 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 24875 transitions. Word has length 23 [2021-05-03 13:54:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:39,432 INFO L480 AbstractCegarLoop]: Abstraction has 7953 states and 24875 transitions. [2021-05-03 13:54:39,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 24875 transitions. [2021-05-03 13:54:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:39,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:39,442 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:39,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-05-03 13:54:39,642 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash 362191367, now seen corresponding path program 309 times [2021-05-03 13:54:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860958719] [2021-05-03 13:54:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:39,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860958719] [2021-05-03 13:54:39,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553422736] [2021-05-03 13:54:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:54:39,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:39,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:40,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:40,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:40,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564139272] [2021-05-03 13:54:40,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:40,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:40,186 INFO L87 Difference]: Start difference. First operand 7953 states and 24875 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:40,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:40,598 INFO L93 Difference]: Finished difference Result 8243 states and 25454 transitions. [2021-05-03 13:54:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:54:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:40,609 INFO L225 Difference]: With dead ends: 8243 [2021-05-03 13:54:40,609 INFO L226 Difference]: Without dead ends: 8236 [2021-05-03 13:54:40,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:54:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-05-03 13:54:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 7951. [2021-05-03 13:54:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7951 states, 7950 states have (on average 3.127924528301887) internal successors, (24867), 7950 states have internal predecessors, (24867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7951 states to 7951 states and 24867 transitions. [2021-05-03 13:54:40,724 INFO L78 Accepts]: Start accepts. Automaton has 7951 states and 24867 transitions. Word has length 23 [2021-05-03 13:54:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:40,725 INFO L480 AbstractCegarLoop]: Abstraction has 7951 states and 24867 transitions. [2021-05-03 13:54:40,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7951 states and 24867 transitions. [2021-05-03 13:54:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:40,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:40,735 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:40,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-05-03 13:54:40,935 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash -681056551, now seen corresponding path program 310 times [2021-05-03 13:54:40,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:40,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855625586] [2021-05-03 13:54:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:41,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855625586] [2021-05-03 13:54:41,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398044524] [2021-05-03 13:54:41,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:41,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:41,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-05-03 13:54:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137769527] [2021-05-03 13:54:41,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:41,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:41,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:41,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:41,441 INFO L87 Difference]: Start difference. First operand 7951 states and 24867 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:42,006 INFO L93 Difference]: Finished difference Result 8146 states and 25212 transitions. [2021-05-03 13:54:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:54:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:42,024 INFO L225 Difference]: With dead ends: 8146 [2021-05-03 13:54:42,024 INFO L226 Difference]: Without dead ends: 8139 [2021-05-03 13:54:42,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8139 states. [2021-05-03 13:54:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8139 to 7950. [2021-05-03 13:54:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.127940621461819) internal successors, (24864), 7949 states have internal predecessors, (24864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 24864 transitions. [2021-05-03 13:54:42,168 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 24864 transitions. Word has length 23 [2021-05-03 13:54:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:42,168 INFO L480 AbstractCegarLoop]: Abstraction has 7950 states and 24864 transitions. [2021-05-03 13:54:42,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 24864 transitions. [2021-05-03 13:54:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:42,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:42,183 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:42,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-05-03 13:54:42,386 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:42,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 521161979, now seen corresponding path program 311 times [2021-05-03 13:54:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:42,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061989923] [2021-05-03 13:54:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:42,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061989923] [2021-05-03 13:54:42,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569430523] [2021-05-03 13:54:42,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:42,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:54:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:42,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:43,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:43,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897676559] [2021-05-03 13:54:43,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:43,180 INFO L87 Difference]: Start difference. First operand 7950 states and 24864 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:43,823 INFO L93 Difference]: Finished difference Result 8403 states and 25974 transitions. [2021-05-03 13:54:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:54:43,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:43,838 INFO L225 Difference]: With dead ends: 8403 [2021-05-03 13:54:43,838 INFO L226 Difference]: Without dead ends: 8393 [2021-05-03 13:54:43,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:43,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2021-05-03 13:54:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8044. [2021-05-03 13:54:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8044 states, 8043 states have (on average 3.133034937212483) internal successors, (25199), 8043 states have internal predecessors, (25199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8044 states to 8044 states and 25199 transitions. [2021-05-03 13:54:43,970 INFO L78 Accepts]: Start accepts. Automaton has 8044 states and 25199 transitions. Word has length 23 [2021-05-03 13:54:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:43,970 INFO L480 AbstractCegarLoop]: Abstraction has 8044 states and 25199 transitions. [2021-05-03 13:54:43,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8044 states and 25199 transitions. [2021-05-03 13:54:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:43,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:43,981 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:44,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:44,182 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2135864703, now seen corresponding path program 312 times [2021-05-03 13:54:44,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:44,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720056805] [2021-05-03 13:54:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:44,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720056805] [2021-05-03 13:54:44,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506492172] [2021-05-03 13:54:44,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:44,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:54:44,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:44,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:44,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:44,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860306784] [2021-05-03 13:54:44,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:44,811 INFO L87 Difference]: Start difference. First operand 8044 states and 25199 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:45,240 INFO L93 Difference]: Finished difference Result 8384 states and 25924 transitions. [2021-05-03 13:54:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:54:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:45,253 INFO L225 Difference]: With dead ends: 8384 [2021-05-03 13:54:45,253 INFO L226 Difference]: Without dead ends: 8377 [2021-05-03 13:54:45,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8377 states. [2021-05-03 13:54:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8377 to 8041. [2021-05-03 13:54:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 3.1327114427860696) internal successors, (25187), 8040 states have internal predecessors, (25187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 25187 transitions. [2021-05-03 13:54:45,375 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 25187 transitions. Word has length 23 [2021-05-03 13:54:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:45,375 INFO L480 AbstractCegarLoop]: Abstraction has 8041 states and 25187 transitions. [2021-05-03 13:54:45,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 25187 transitions. [2021-05-03 13:54:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:45,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:45,384 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:45,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:45,585 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1092616785, now seen corresponding path program 313 times [2021-05-03 13:54:45,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:45,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437654332] [2021-05-03 13:54:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437654332] [2021-05-03 13:54:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156693671] [2021-05-03 13:54:45,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:46,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:46,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:46,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037389154] [2021-05-03 13:54:46,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:46,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:46,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:46,094 INFO L87 Difference]: Start difference. First operand 8041 states and 25187 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:46,586 INFO L93 Difference]: Finished difference Result 8323 states and 25762 transitions. [2021-05-03 13:54:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:54:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:46,601 INFO L225 Difference]: With dead ends: 8323 [2021-05-03 13:54:46,601 INFO L226 Difference]: Without dead ends: 8310 [2021-05-03 13:54:46,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 511.9ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8310 states. [2021-05-03 13:54:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8310 to 8045. [2021-05-03 13:54:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.131775236200895) internal successors, (25192), 8044 states have internal predecessors, (25192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 25192 transitions. [2021-05-03 13:54:46,724 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 25192 transitions. Word has length 23 [2021-05-03 13:54:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:46,724 INFO L480 AbstractCegarLoop]: Abstraction has 8045 states and 25192 transitions. [2021-05-03 13:54:46,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 25192 transitions. [2021-05-03 13:54:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:46,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:46,735 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:46,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-05-03 13:54:46,935 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1627846587, now seen corresponding path program 314 times [2021-05-03 13:54:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:46,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584713205] [2021-05-03 13:54:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584713205] [2021-05-03 13:54:47,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240521990] [2021-05-03 13:54:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:47,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:47,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:47,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783177345] [2021-05-03 13:54:47,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:47,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:47,776 INFO L87 Difference]: Start difference. First operand 8045 states and 25192 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:48,514 INFO L93 Difference]: Finished difference Result 8231 states and 25513 transitions. [2021-05-03 13:54:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:54:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:48,528 INFO L225 Difference]: With dead ends: 8231 [2021-05-03 13:54:48,528 INFO L226 Difference]: Without dead ends: 8224 [2021-05-03 13:54:48,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-05-03 13:54:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 8043. [2021-05-03 13:54:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8043 states, 8042 states have (on average 3.1318080079582193) internal successors, (25186), 8042 states have internal predecessors, (25186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8043 states to 8043 states and 25186 transitions. [2021-05-03 13:54:48,646 INFO L78 Accepts]: Start accepts. Automaton has 8043 states and 25186 transitions. Word has length 23 [2021-05-03 13:54:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:48,646 INFO L480 AbstractCegarLoop]: Abstraction has 8043 states and 25186 transitions. [2021-05-03 13:54:48,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8043 states and 25186 transitions. [2021-05-03 13:54:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:48,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:48,656 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:48,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:48,856 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:48,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:48,857 INFO L82 PathProgramCache]: Analyzing trace with hash -108653125, now seen corresponding path program 315 times [2021-05-03 13:54:48,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:48,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383168905] [2021-05-03 13:54:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:49,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383168905] [2021-05-03 13:54:49,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284707741] [2021-05-03 13:54:49,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:49,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:54:49,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:49,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:49,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:49,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395675594] [2021-05-03 13:54:49,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:49,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:49,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:49,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:49,473 INFO L87 Difference]: Start difference. First operand 8043 states and 25186 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:49,902 INFO L93 Difference]: Finished difference Result 8179 states and 25417 transitions. [2021-05-03 13:54:49,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:54:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:49,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:49,914 INFO L225 Difference]: With dead ends: 8179 [2021-05-03 13:54:49,914 INFO L226 Difference]: Without dead ends: 8163 [2021-05-03 13:54:49,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8163 states. [2021-05-03 13:54:50,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8163 to 8022. [2021-05-03 13:54:50,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 3.132153098117442) internal successors, (25123), 8021 states have internal predecessors, (25123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 25123 transitions. [2021-05-03 13:54:50,042 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 25123 transitions. Word has length 23 [2021-05-03 13:54:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:50,042 INFO L480 AbstractCegarLoop]: Abstraction has 8022 states and 25123 transitions. [2021-05-03 13:54:50,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 25123 transitions. [2021-05-03 13:54:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:50,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:50,053 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:50,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,319 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:50,253 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -329539453, now seen corresponding path program 316 times [2021-05-03 13:54:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144837031] [2021-05-03 13:54:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:50,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144837031] [2021-05-03 13:54:50,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626049871] [2021-05-03 13:54:50,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:50,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:50,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:50,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:50,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:50,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:50,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748546408] [2021-05-03 13:54:50,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:50,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:50,736 INFO L87 Difference]: Start difference. First operand 8022 states and 25123 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:51,221 INFO L93 Difference]: Finished difference Result 8489 states and 26222 transitions. [2021-05-03 13:54:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:54:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:51,235 INFO L225 Difference]: With dead ends: 8489 [2021-05-03 13:54:51,236 INFO L226 Difference]: Without dead ends: 8479 [2021-05-03 13:54:51,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8479 states. [2021-05-03 13:54:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8479 to 8124. [2021-05-03 13:54:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 8123 states have (on average 3.1368952357503384) internal successors, (25481), 8123 states have internal predecessors, (25481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 25481 transitions. [2021-05-03 13:54:51,368 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 25481 transitions. Word has length 23 [2021-05-03 13:54:51,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:51,368 INFO L480 AbstractCegarLoop]: Abstraction has 8124 states and 25481 transitions. [2021-05-03 13:54:51,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 25481 transitions. [2021-05-03 13:54:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:51,379 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:51,379 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:51,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:51,579 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1285163271, now seen corresponding path program 317 times [2021-05-03 13:54:51,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:51,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663517104] [2021-05-03 13:54:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:51,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663517104] [2021-05-03 13:54:51,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770920239] [2021-05-03 13:54:51,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:51,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:54:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:52,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:52,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:52,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411975851] [2021-05-03 13:54:52,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:52,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:52,352 INFO L87 Difference]: Start difference. First operand 8124 states and 25481 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:53,064 INFO L93 Difference]: Finished difference Result 8470 states and 26170 transitions. [2021-05-03 13:54:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:54:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:53,078 INFO L225 Difference]: With dead ends: 8470 [2021-05-03 13:54:53,078 INFO L226 Difference]: Without dead ends: 8463 [2021-05-03 13:54:53,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 744.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:54:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8463 states. [2021-05-03 13:54:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8463 to 8120. [2021-05-03 13:54:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.1364700086217514) internal successors, (25465), 8119 states have internal predecessors, (25465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25465 transitions. [2021-05-03 13:54:53,202 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25465 transitions. Word has length 23 [2021-05-03 13:54:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:53,202 INFO L480 AbstractCegarLoop]: Abstraction has 8120 states and 25465 transitions. [2021-05-03 13:54:53,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25465 transitions. [2021-05-03 13:54:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:53,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:53,212 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:53,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-03 13:54:53,413 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 241915353, now seen corresponding path program 318 times [2021-05-03 13:54:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:53,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028386884] [2021-05-03 13:54:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028386884] [2021-05-03 13:54:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804559596] [2021-05-03 13:54:53,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:53,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:54:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:53,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:53,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163662852] [2021-05-03 13:54:53,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:53,998 INFO L87 Difference]: Start difference. First operand 8120 states and 25465 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:54,510 INFO L93 Difference]: Finished difference Result 8466 states and 26134 transitions. [2021-05-03 13:54:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:54:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:54,522 INFO L225 Difference]: With dead ends: 8466 [2021-05-03 13:54:54,522 INFO L226 Difference]: Without dead ends: 8453 [2021-05-03 13:54:54,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 569.1ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8453 states. [2021-05-03 13:54:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8453 to 8117. [2021-05-03 13:54:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.13590438639724) internal successors, (25451), 8116 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25451 transitions. [2021-05-03 13:54:54,633 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25451 transitions. Word has length 23 [2021-05-03 13:54:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:54,633 INFO L480 AbstractCegarLoop]: Abstraction has 8117 states and 25451 transitions. [2021-05-03 13:54:54,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25451 transitions. [2021-05-03 13:54:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:54,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:54,643 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:54,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-05-03 13:54:54,843 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:54,844 INFO L82 PathProgramCache]: Analyzing trace with hash 777145155, now seen corresponding path program 319 times [2021-05-03 13:54:54,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:54,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762539471] [2021-05-03 13:54:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:55,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762539471] [2021-05-03 13:54:55,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588063300] [2021-05-03 13:54:55,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:55,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:55,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:55,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251043639] [2021-05-03 13:54:55,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:55,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:55,301 INFO L87 Difference]: Start difference. First operand 8117 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:55,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:55,994 INFO L93 Difference]: Finished difference Result 8405 states and 25973 transitions. [2021-05-03 13:54:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:56,007 INFO L225 Difference]: With dead ends: 8405 [2021-05-03 13:54:56,007 INFO L226 Difference]: Without dead ends: 8389 [2021-05-03 13:54:56,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-05-03 13:54:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8120. [2021-05-03 13:54:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 8119 states have (on average 3.134745658332307) internal successors, (25451), 8119 states have internal predecessors, (25451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 25451 transitions. [2021-05-03 13:54:56,128 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 25451 transitions. Word has length 23 [2021-05-03 13:54:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:56,128 INFO L480 AbstractCegarLoop]: Abstraction has 8120 states and 25451 transitions. [2021-05-03 13:54:56,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 25451 transitions. [2021-05-03 13:54:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:56,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:56,137 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:56,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:56,338 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:56,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:56,338 INFO L82 PathProgramCache]: Analyzing trace with hash 189399833, now seen corresponding path program 320 times [2021-05-03 13:54:56,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:56,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608471636] [2021-05-03 13:54:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:56,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608471636] [2021-05-03 13:54:56,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501994487] [2021-05-03 13:54:56,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:56,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:56,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:57,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:54:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139065689] [2021-05-03 13:54:57,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:57,143 INFO L87 Difference]: Start difference. First operand 8120 states and 25451 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:58,033 INFO L93 Difference]: Finished difference Result 8334 states and 25817 transitions. [2021-05-03 13:54:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:54:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:58,047 INFO L225 Difference]: With dead ends: 8334 [2021-05-03 13:54:58,048 INFO L226 Difference]: Without dead ends: 8327 [2021-05-03 13:54:58,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 857.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:54:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8327 states. [2021-05-03 13:54:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8327 to 8117. [2021-05-03 13:54:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8117 states, 8116 states have (on average 3.1347954657466732) internal successors, (25442), 8116 states have internal predecessors, (25442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8117 states to 8117 states and 25442 transitions. [2021-05-03 13:54:58,172 INFO L78 Accepts]: Start accepts. Automaton has 8117 states and 25442 transitions. Word has length 23 [2021-05-03 13:54:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:58,172 INFO L480 AbstractCegarLoop]: Abstraction has 8117 states and 25442 transitions. [2021-05-03 13:54:58,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8117 states and 25442 transitions. [2021-05-03 13:54:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:54:58,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:58,182 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:58,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-05-03 13:54:58,383 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:58,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1894430651, now seen corresponding path program 321 times [2021-05-03 13:54:58,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:58,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235650246] [2021-05-03 13:54:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235650246] [2021-05-03 13:54:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823510787] [2021-05-03 13:54:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:58,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:54:58,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:54:58,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:59,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:59,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-05-03 13:54:59,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453057684] [2021-05-03 13:54:59,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:54:59,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:59,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:54:59,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:54:59,149 INFO L87 Difference]: Start difference. First operand 8117 states and 25442 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:59,875 INFO L93 Difference]: Finished difference Result 8376 states and 25895 transitions. [2021-05-03 13:54:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:54:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:54:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:59,888 INFO L225 Difference]: With dead ends: 8376 [2021-05-03 13:54:59,888 INFO L226 Difference]: Without dead ends: 8360 [2021-05-03 13:54:59,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:54:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2021-05-03 13:54:59,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8101. [2021-05-03 13:55:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8101 states, 8100 states have (on average 3.1339506172839506) internal successors, (25385), 8100 states have internal predecessors, (25385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8101 states to 8101 states and 25385 transitions. [2021-05-03 13:55:00,018 INFO L78 Accepts]: Start accepts. Automaton has 8101 states and 25385 transitions. Word has length 23 [2021-05-03 13:55:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:00,018 INFO L480 AbstractCegarLoop]: Abstraction has 8101 states and 25385 transitions. [2021-05-03 13:55:00,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8101 states and 25385 transitions. [2021-05-03 13:55:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:00,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:00,028 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:00,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-05-03 13:55:00,228 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:00,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2102483687, now seen corresponding path program 322 times [2021-05-03 13:55:00,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:00,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186905414] [2021-05-03 13:55:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186905414] [2021-05-03 13:55:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86902453] [2021-05-03 13:55:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:00,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:00,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:00,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:00,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-05-03 13:55:00,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576663145] [2021-05-03 13:55:00,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:00,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:00,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:00,785 INFO L87 Difference]: Start difference. First operand 8101 states and 25385 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:01,323 INFO L93 Difference]: Finished difference Result 8270 states and 25679 transitions. [2021-05-03 13:55:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:55:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:01,335 INFO L225 Difference]: With dead ends: 8270 [2021-05-03 13:55:01,335 INFO L226 Difference]: Without dead ends: 8251 [2021-05-03 13:55:01,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:55:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-05-03 13:55:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 8085. [2021-05-03 13:55:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8085 states, 8084 states have (on average 3.13421573478476) internal successors, (25337), 8084 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8085 states to 8085 states and 25337 transitions. [2021-05-03 13:55:01,450 INFO L78 Accepts]: Start accepts. Automaton has 8085 states and 25337 transitions. Word has length 23 [2021-05-03 13:55:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:01,450 INFO L480 AbstractCegarLoop]: Abstraction has 8085 states and 25337 transitions. [2021-05-03 13:55:01,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8085 states and 25337 transitions. [2021-05-03 13:55:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:01,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:01,459 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:01,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-05-03 13:55:01,660 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:01,660 INFO L82 PathProgramCache]: Analyzing trace with hash -931480069, now seen corresponding path program 323 times [2021-05-03 13:55:01,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:01,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081141727] [2021-05-03 13:55:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081141727] [2021-05-03 13:55:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619652482] [2021-05-03 13:55:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:01,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:55:01,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:01,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:02,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:02,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:02,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396746115] [2021-05-03 13:55:02,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:02,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:02,256 INFO L87 Difference]: Start difference. First operand 8085 states and 25337 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:02,971 INFO L93 Difference]: Finished difference Result 8595 states and 26485 transitions. [2021-05-03 13:55:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:55:02,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:02,985 INFO L225 Difference]: With dead ends: 8595 [2021-05-03 13:55:02,985 INFO L226 Difference]: Without dead ends: 8585 [2021-05-03 13:55:02,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:55:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-05-03 13:55:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 8181. [2021-05-03 13:55:03,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8180 states have (on average 3.1383863080684598) internal successors, (25672), 8180 states have internal predecessors, (25672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 25672 transitions. [2021-05-03 13:55:03,117 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 25672 transitions. Word has length 23 [2021-05-03 13:55:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:03,117 INFO L480 AbstractCegarLoop]: Abstraction has 8181 states and 25672 transitions. [2021-05-03 13:55:03,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 25672 transitions. [2021-05-03 13:55:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:03,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:03,128 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:03,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:03,329 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 683222655, now seen corresponding path program 324 times [2021-05-03 13:55:03,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:03,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403478984] [2021-05-03 13:55:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:03,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403478984] [2021-05-03 13:55:03,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224594344] [2021-05-03 13:55:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:03,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:55:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:04,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:04,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:04,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:04,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545904373] [2021-05-03 13:55:04,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:04,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:04,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:04,059 INFO L87 Difference]: Start difference. First operand 8181 states and 25672 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:04,832 INFO L93 Difference]: Finished difference Result 8579 states and 26445 transitions. [2021-05-03 13:55:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:55:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:04,844 INFO L225 Difference]: With dead ends: 8579 [2021-05-03 13:55:04,844 INFO L226 Difference]: Without dead ends: 8572 [2021-05-03 13:55:04,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 717.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:55:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8572 states. [2021-05-03 13:55:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8572 to 8170. [2021-05-03 13:55:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8170 states, 8169 states have (on average 3.138082996694822) internal successors, (25635), 8169 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8170 states to 8170 states and 25635 transitions. [2021-05-03 13:55:04,977 INFO L78 Accepts]: Start accepts. Automaton has 8170 states and 25635 transitions. Word has length 23 [2021-05-03 13:55:04,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:04,977 INFO L480 AbstractCegarLoop]: Abstraction has 8170 states and 25635 transitions. [2021-05-03 13:55:04,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 8170 states and 25635 transitions. [2021-05-03 13:55:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:04,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:04,988 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:05,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:05,188 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -360025263, now seen corresponding path program 325 times [2021-05-03 13:55:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:05,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888755083] [2021-05-03 13:55:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888755083] [2021-05-03 13:55:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061300388] [2021-05-03 13:55:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:05,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:05,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:05,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:05,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494899220] [2021-05-03 13:55:05,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:05,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:05,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:05,702 INFO L87 Difference]: Start difference. First operand 8170 states and 25635 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:06,273 INFO L93 Difference]: Finished difference Result 8583 states and 26428 transitions. [2021-05-03 13:55:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:55:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:06,287 INFO L225 Difference]: With dead ends: 8583 [2021-05-03 13:55:06,287 INFO L226 Difference]: Without dead ends: 8570 [2021-05-03 13:55:06,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 518.3ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:55:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-05-03 13:55:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 8166. [2021-05-03 13:55:06,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 8165 states have (on average 3.1375382731169625) internal successors, (25618), 8165 states have internal predecessors, (25618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 25618 transitions. [2021-05-03 13:55:06,434 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 25618 transitions. Word has length 23 [2021-05-03 13:55:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:06,434 INFO L480 AbstractCegarLoop]: Abstraction has 8166 states and 25618 transitions. [2021-05-03 13:55:06,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 25618 transitions. [2021-05-03 13:55:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:06,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:06,445 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:06,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-05-03 13:55:06,647 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash 175204539, now seen corresponding path program 326 times [2021-05-03 13:55:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:06,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879875147] [2021-05-03 13:55:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879875147] [2021-05-03 13:55:06,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988706886] [2021-05-03 13:55:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:06,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:55:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:07,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:07,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:07,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226123555] [2021-05-03 13:55:07,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:07,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:07,164 INFO L87 Difference]: Start difference. First operand 8166 states and 25618 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:07,980 INFO L93 Difference]: Finished difference Result 8591 states and 26411 transitions. [2021-05-03 13:55:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:55:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:07,996 INFO L225 Difference]: With dead ends: 8591 [2021-05-03 13:55:07,996 INFO L226 Difference]: Without dead ends: 8575 [2021-05-03 13:55:07,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:55:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8575 states. [2021-05-03 13:55:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8575 to 8162. [2021-05-03 13:55:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8162 states, 8161 states have (on average 3.1371155495650043) internal successors, (25602), 8161 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8162 states to 8162 states and 25602 transitions. [2021-05-03 13:55:08,144 INFO L78 Accepts]: Start accepts. Automaton has 8162 states and 25602 transitions. Word has length 23 [2021-05-03 13:55:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:08,144 INFO L480 AbstractCegarLoop]: Abstraction has 8162 states and 25602 transitions. [2021-05-03 13:55:08,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8162 states and 25602 transitions. [2021-05-03 13:55:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:08,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:08,157 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:08,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-05-03 13:55:08,358 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -412540783, now seen corresponding path program 327 times [2021-05-03 13:55:08,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:08,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617335280] [2021-05-03 13:55:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617335280] [2021-05-03 13:55:08,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713460875] [2021-05-03 13:55:08,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:08,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:55:08,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:08,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:09,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:09,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90026001] [2021-05-03 13:55:09,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:09,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:09,345 INFO L87 Difference]: Start difference. First operand 8162 states and 25602 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:10,448 INFO L93 Difference]: Finished difference Result 8522 states and 26260 transitions. [2021-05-03 13:55:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:55:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:10,463 INFO L225 Difference]: With dead ends: 8522 [2021-05-03 13:55:10,463 INFO L226 Difference]: Without dead ends: 8503 [2021-05-03 13:55:10,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1065.5ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:55:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8503 states. [2021-05-03 13:55:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8503 to 8158. [2021-05-03 13:55:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8158 states, 8157 states have (on average 3.136815005516734) internal successors, (25587), 8157 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8158 states to 8158 states and 25587 transitions. [2021-05-03 13:55:10,600 INFO L78 Accepts]: Start accepts. Automaton has 8158 states and 25587 transitions. Word has length 23 [2021-05-03 13:55:10,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:10,600 INFO L480 AbstractCegarLoop]: Abstraction has 8158 states and 25587 transitions. [2021-05-03 13:55:10,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 8158 states and 25587 transitions. [2021-05-03 13:55:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 13:55:10,612 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:10,612 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:10,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-05-03 13:55:10,817 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1452776581, now seen corresponding path program 328 times [2021-05-03 13:55:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:10,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234952201] [2021-05-03 13:55:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234952201] [2021-05-03 13:55:11,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405399873] [2021-05-03 13:55:11,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:11,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-03 13:55:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:11,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:11,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-05-03 13:55:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706651094] [2021-05-03 13:55:11,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 13:55:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 13:55:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:55:11,607 INFO L87 Difference]: Start difference. First operand 8158 states and 25587 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:12,692 INFO L93 Difference]: Finished difference Result 8435 states and 26072 transitions. [2021-05-03 13:55:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:55:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 13:55:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:12,710 INFO L225 Difference]: With dead ends: 8435 [2021-05-03 13:55:12,710 INFO L226 Difference]: Without dead ends: 8428 [2021-05-03 13:55:12,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:55:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2021-05-03 13:55:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8154. [2021-05-03 13:55:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 3.1368821292775664) internal successors, (25575), 8153 states have internal predecessors, (25575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 25575 transitions. [2021-05-03 13:55:12,854 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 25575 transitions. Word has length 23 [2021-05-03 13:55:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:12,854 INFO L480 AbstractCegarLoop]: Abstraction has 8154 states and 25575 transitions. [2021-05-03 13:55:12,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 25575 transitions. [2021-05-03 13:55:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:12,865 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:12,865 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:13,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:13,066 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 835429403, now seen corresponding path program 329 times [2021-05-03 13:55:13,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:13,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363894937] [2021-05-03 13:55:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363894937] [2021-05-03 13:55:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293462935] [2021-05-03 13:55:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:13,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:55:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:13,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:13,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:13,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-05-03 13:55:13,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502914686] [2021-05-03 13:55:13,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:55:13,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:13,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:55:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:55:13,383 INFO L87 Difference]: Start difference. First operand 8154 states and 25575 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:13,682 INFO L93 Difference]: Finished difference Result 11007 states and 33833 transitions. [2021-05-03 13:55:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:55:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:13,699 INFO L225 Difference]: With dead ends: 11007 [2021-05-03 13:55:13,699 INFO L226 Difference]: Without dead ends: 10984 [2021-05-03 13:55:13,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:55:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-05-03 13:55:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8149. [2021-05-03 13:55:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 8148 states have (on average 3.1375797741777123) internal successors, (25565), 8148 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 25565 transitions. [2021-05-03 13:55:13,857 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 25565 transitions. Word has length 24 [2021-05-03 13:55:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:13,857 INFO L480 AbstractCegarLoop]: Abstraction has 8149 states and 25565 transitions. [2021-05-03 13:55:13,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 25565 transitions. [2021-05-03 13:55:13,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:13,868 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:13,868 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:14,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-05-03 13:55:14,069 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2031355403, now seen corresponding path program 330 times [2021-05-03 13:55:14,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:14,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508796726] [2021-05-03 13:55:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:14,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508796726] [2021-05-03 13:55:14,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788999178] [2021-05-03 13:55:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:14,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:55:14,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:14,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:14,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-05-03 13:55:14,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005257694] [2021-05-03 13:55:14,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:55:14,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:14,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:55:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:55:14,398 INFO L87 Difference]: Start difference. First operand 8149 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:14,639 INFO L93 Difference]: Finished difference Result 11150 states and 34266 transitions. [2021-05-03 13:55:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:55:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:14,656 INFO L225 Difference]: With dead ends: 11150 [2021-05-03 13:55:14,656 INFO L226 Difference]: Without dead ends: 11150 [2021-05-03 13:55:14,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:55:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11150 states. [2021-05-03 13:55:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11150 to 8243. [2021-05-03 13:55:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8243 states, 8242 states have (on average 3.1360106770201406) internal successors, (25847), 8242 states have internal predecessors, (25847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 25847 transitions. [2021-05-03 13:55:14,820 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 25847 transitions. Word has length 24 [2021-05-03 13:55:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:14,820 INFO L480 AbstractCegarLoop]: Abstraction has 8243 states and 25847 transitions. [2021-05-03 13:55:14,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 25847 transitions. [2021-05-03 13:55:14,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:14,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:14,834 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:15,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:15,035 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1049828081, now seen corresponding path program 331 times [2021-05-03 13:55:15,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:15,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367775521] [2021-05-03 13:55:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:15,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367775521] [2021-05-03 13:55:15,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889052374] [2021-05-03 13:55:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:15,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:15,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:15,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097018419] [2021-05-03 13:55:15,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:15,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:15,568 INFO L87 Difference]: Start difference. First operand 8243 states and 25847 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:17,554 INFO L93 Difference]: Finished difference Result 12726 states and 38747 transitions. [2021-05-03 13:55:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 13:55:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:17,576 INFO L225 Difference]: With dead ends: 12726 [2021-05-03 13:55:17,576 INFO L226 Difference]: Without dead ends: 12716 [2021-05-03 13:55:17,577 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1762.7ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:55:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-05-03 13:55:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 9550. [2021-05-03 13:55:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9550 states, 9549 states have (on average 3.163472614933501) internal successors, (30208), 9549 states have internal predecessors, (30208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9550 states to 9550 states and 30208 transitions. [2021-05-03 13:55:17,800 INFO L78 Accepts]: Start accepts. Automaton has 9550 states and 30208 transitions. Word has length 24 [2021-05-03 13:55:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 9550 states and 30208 transitions. [2021-05-03 13:55:17,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9550 states and 30208 transitions. [2021-05-03 13:55:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:17,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:17,812 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:18,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-05-03 13:55:18,012 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -478373275, now seen corresponding path program 332 times [2021-05-03 13:55:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:18,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334022933] [2021-05-03 13:55:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:18,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334022933] [2021-05-03 13:55:18,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600322858] [2021-05-03 13:55:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:55:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:18,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:18,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9383403] [2021-05-03 13:55:18,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:18,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:18,524 INFO L87 Difference]: Start difference. First operand 9550 states and 30208 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:20,612 INFO L93 Difference]: Finished difference Result 12601 states and 38222 transitions. [2021-05-03 13:55:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 13:55:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:20,634 INFO L225 Difference]: With dead ends: 12601 [2021-05-03 13:55:20,634 INFO L226 Difference]: Without dead ends: 12595 [2021-05-03 13:55:20,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1690.1ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 13:55:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12595 states. [2021-05-03 13:55:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12595 to 9022. [2021-05-03 13:55:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9022 states, 9021 states have (on average 3.1354617004766654) internal successors, (28285), 9021 states have internal predecessors, (28285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9022 states to 9022 states and 28285 transitions. [2021-05-03 13:55:20,801 INFO L78 Accepts]: Start accepts. Automaton has 9022 states and 28285 transitions. Word has length 24 [2021-05-03 13:55:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:20,801 INFO L480 AbstractCegarLoop]: Abstraction has 9022 states and 28285 transitions. [2021-05-03 13:55:20,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9022 states and 28285 transitions. [2021-05-03 13:55:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:20,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:20,812 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:21,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:21,012 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:21,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1885022475, now seen corresponding path program 333 times [2021-05-03 13:55:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:21,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790430631] [2021-05-03 13:55:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:21,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790430631] [2021-05-03 13:55:21,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479841408] [2021-05-03 13:55:21,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:21,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:55:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:21,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:21,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:21,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:21,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:21,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300293261] [2021-05-03 13:55:21,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:21,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:21,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:21,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:21,357 INFO L87 Difference]: Start difference. First operand 9022 states and 28285 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:23,295 INFO L93 Difference]: Finished difference Result 11076 states and 33757 transitions. [2021-05-03 13:55:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 13:55:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:23,314 INFO L225 Difference]: With dead ends: 11076 [2021-05-03 13:55:23,314 INFO L226 Difference]: Without dead ends: 11076 [2021-05-03 13:55:23,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1585.7ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 13:55:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11076 states. [2021-05-03 13:55:23,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11076 to 9541. [2021-05-03 13:55:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9541 states, 9540 states have (on average 3.1517819706498953) internal successors, (30068), 9540 states have internal predecessors, (30068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9541 states to 9541 states and 30068 transitions. [2021-05-03 13:55:23,499 INFO L78 Accepts]: Start accepts. Automaton has 9541 states and 30068 transitions. Word has length 24 [2021-05-03 13:55:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:23,499 INFO L480 AbstractCegarLoop]: Abstraction has 9541 states and 30068 transitions. [2021-05-03 13:55:23,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 9541 states and 30068 transitions. [2021-05-03 13:55:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:23,514 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:23,514 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:23,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:23,714 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:23,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1420431371, now seen corresponding path program 334 times [2021-05-03 13:55:23,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:23,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090961093] [2021-05-03 13:55:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:23,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090961093] [2021-05-03 13:55:23,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787212889] [2021-05-03 13:55:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:23,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:24,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:24,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:24,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431789997] [2021-05-03 13:55:24,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:24,243 INFO L87 Difference]: Start difference. First operand 9541 states and 30068 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:26,338 INFO L93 Difference]: Finished difference Result 10620 states and 32666 transitions. [2021-05-03 13:55:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:55:26,340 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:26,355 INFO L225 Difference]: With dead ends: 10620 [2021-05-03 13:55:26,355 INFO L226 Difference]: Without dead ends: 10616 [2021-05-03 13:55:26,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1923.0ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 13:55:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10616 states. [2021-05-03 13:55:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10616 to 8587. [2021-05-03 13:55:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 8586 states have (on average 3.1179827626368506) internal successors, (26771), 8586 states have internal predecessors, (26771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 26771 transitions. [2021-05-03 13:55:26,498 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 26771 transitions. Word has length 24 [2021-05-03 13:55:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:26,498 INFO L480 AbstractCegarLoop]: Abstraction has 8587 states and 26771 transitions. [2021-05-03 13:55:26,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 26771 transitions. [2021-05-03 13:55:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:26,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:26,509 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:26,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-05-03 13:55:26,710 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash 56856527, now seen corresponding path program 335 times [2021-05-03 13:55:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:26,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966925689] [2021-05-03 13:55:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966925689] [2021-05-03 13:55:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125336866] [2021-05-03 13:55:26,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:26,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:55:26,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:27,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:27,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:27,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036147637] [2021-05-03 13:55:27,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:27,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:27,138 INFO L87 Difference]: Start difference. First operand 8587 states and 26771 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:28,550 INFO L93 Difference]: Finished difference Result 11811 states and 35428 transitions. [2021-05-03 13:55:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 13:55:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:28,574 INFO L225 Difference]: With dead ends: 11811 [2021-05-03 13:55:28,574 INFO L226 Difference]: Without dead ends: 11802 [2021-05-03 13:55:28,575 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:55:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11802 states. [2021-05-03 13:55:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11802 to 8719. [2021-05-03 13:55:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8719 states, 8718 states have (on average 3.118261069052535) internal successors, (27185), 8718 states have internal predecessors, (27185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8719 states to 8719 states and 27185 transitions. [2021-05-03 13:55:28,748 INFO L78 Accepts]: Start accepts. Automaton has 8719 states and 27185 transitions. Word has length 24 [2021-05-03 13:55:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:28,748 INFO L480 AbstractCegarLoop]: Abstraction has 8719 states and 27185 transitions. [2021-05-03 13:55:28,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 8719 states and 27185 transitions. [2021-05-03 13:55:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:28,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:28,759 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:28,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:28,960 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash -530888795, now seen corresponding path program 336 times [2021-05-03 13:55:28,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:28,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084909999] [2021-05-03 13:55:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:29,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084909999] [2021-05-03 13:55:29,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998025710] [2021-05-03 13:55:29,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:29,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:55:29,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:29,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:29,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:29,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193803968] [2021-05-03 13:55:29,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:29,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:29,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:29,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:29,478 INFO L87 Difference]: Start difference. First operand 8719 states and 27185 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:31,093 INFO L93 Difference]: Finished difference Result 11970 states and 35970 transitions. [2021-05-03 13:55:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:55:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:31,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:31,112 INFO L225 Difference]: With dead ends: 11970 [2021-05-03 13:55:31,113 INFO L226 Difference]: Without dead ends: 11958 [2021-05-03 13:55:31,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1446.6ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:55:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11958 states. [2021-05-03 13:55:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11958 to 8793. [2021-05-03 13:55:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 3.1199954504094634) internal successors, (27431), 8792 states have internal predecessors, (27431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 27431 transitions. [2021-05-03 13:55:31,303 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 27431 transitions. Word has length 24 [2021-05-03 13:55:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:31,303 INFO L480 AbstractCegarLoop]: Abstraction has 8793 states and 27431 transitions. [2021-05-03 13:55:31,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 27431 transitions. [2021-05-03 13:55:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:31,314 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:31,314 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:31,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:31,515 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:31,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1571124593, now seen corresponding path program 337 times [2021-05-03 13:55:31,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:31,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552601750] [2021-05-03 13:55:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:31,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552601750] [2021-05-03 13:55:31,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889016756] [2021-05-03 13:55:31,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:31,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:31,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:31,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:31,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:31,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781152183] [2021-05-03 13:55:31,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:31,866 INFO L87 Difference]: Start difference. First operand 8793 states and 27431 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:32,886 INFO L93 Difference]: Finished difference Result 12336 states and 37268 transitions. [2021-05-03 13:55:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 13:55:32,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:32,905 INFO L225 Difference]: With dead ends: 12336 [2021-05-03 13:55:32,905 INFO L226 Difference]: Without dead ends: 12321 [2021-05-03 13:55:32,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 13:55:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2021-05-03 13:55:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 8832. [2021-05-03 13:55:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8832 states, 8831 states have (on average 3.1192390442758464) internal successors, (27546), 8831 states have internal predecessors, (27546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8832 states to 8832 states and 27546 transitions. [2021-05-03 13:55:33,090 INFO L78 Accepts]: Start accepts. Automaton has 8832 states and 27546 transitions. Word has length 24 [2021-05-03 13:55:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:33,090 INFO L480 AbstractCegarLoop]: Abstraction has 8832 states and 27546 transitions. [2021-05-03 13:55:33,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8832 states and 27546 transitions. [2021-05-03 13:55:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:33,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:33,101 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:33,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-05-03 13:55:33,302 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash 541304037, now seen corresponding path program 338 times [2021-05-03 13:55:33,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:33,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279703157] [2021-05-03 13:55:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:33,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279703157] [2021-05-03 13:55:33,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329545548] [2021-05-03 13:55:33,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:33,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:55:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:33,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:33,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:33,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319625915] [2021-05-03 13:55:33,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:33,689 INFO L87 Difference]: Start difference. First operand 8832 states and 27546 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:35,065 INFO L93 Difference]: Finished difference Result 12564 states and 38035 transitions. [2021-05-03 13:55:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:55:35,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:35,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:35,090 INFO L225 Difference]: With dead ends: 12564 [2021-05-03 13:55:35,090 INFO L226 Difference]: Without dead ends: 12546 [2021-05-03 13:55:35,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1229.2ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 13:55:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12546 states. [2021-05-03 13:55:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12546 to 8863. [2021-05-03 13:55:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.116339426765967) internal successors, (27617), 8862 states have internal predecessors, (27617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27617 transitions. [2021-05-03 13:55:35,297 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27617 transitions. Word has length 24 [2021-05-03 13:55:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:35,297 INFO L480 AbstractCegarLoop]: Abstraction has 8863 states and 27617 transitions. [2021-05-03 13:55:35,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27617 transitions. [2021-05-03 13:55:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:35,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:35,310 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:35,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-03 13:55:35,511 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1602082127, now seen corresponding path program 339 times [2021-05-03 13:55:35,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:35,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430957267] [2021-05-03 13:55:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:35,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430957267] [2021-05-03 13:55:35,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160930311] [2021-05-03 13:55:35,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:35,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:55:35,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:35,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:35,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:36,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:36,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:55:36,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956993794] [2021-05-03 13:55:36,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:36,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:36,217 INFO L87 Difference]: Start difference. First operand 8863 states and 27617 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:37,166 INFO L93 Difference]: Finished difference Result 11519 states and 34816 transitions. [2021-05-03 13:55:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:55:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:37,184 INFO L225 Difference]: With dead ends: 11519 [2021-05-03 13:55:37,184 INFO L226 Difference]: Without dead ends: 11501 [2021-05-03 13:55:37,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:55:37,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2021-05-03 13:55:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 8863. [2021-05-03 13:55:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8863 states, 8862 states have (on average 3.115662378695554) internal successors, (27611), 8862 states have internal predecessors, (27611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8863 states to 8863 states and 27611 transitions. [2021-05-03 13:55:37,342 INFO L78 Accepts]: Start accepts. Automaton has 8863 states and 27611 transitions. Word has length 24 [2021-05-03 13:55:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:37,342 INFO L480 AbstractCegarLoop]: Abstraction has 8863 states and 27611 transitions. [2021-05-03 13:55:37,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 8863 states and 27611 transitions. [2021-05-03 13:55:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:37,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:37,354 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:37,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-05-03 13:55:37,555 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:37,555 INFO L82 PathProgramCache]: Analyzing trace with hash 370144463, now seen corresponding path program 340 times [2021-05-03 13:55:37,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:37,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384796083] [2021-05-03 13:55:37,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:37,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384796083] [2021-05-03 13:55:37,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826960335] [2021-05-03 13:55:37,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:37,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:37,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:37,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:55:37,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810059521] [2021-05-03 13:55:37,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:37,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:37,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:37,937 INFO L87 Difference]: Start difference. First operand 8863 states and 27611 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:39,696 INFO L93 Difference]: Finished difference Result 10540 states and 31822 transitions. [2021-05-03 13:55:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:55:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:39,712 INFO L225 Difference]: With dead ends: 10540 [2021-05-03 13:55:39,712 INFO L226 Difference]: Without dead ends: 10528 [2021-05-03 13:55:39,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1432.2ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 13:55:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-05-03 13:55:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 9379. [2021-05-03 13:55:39,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9379 states, 9378 states have (on average 3.1330774152271275) internal successors, (29382), 9378 states have internal predecessors, (29382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9379 states to 9379 states and 29382 transitions. [2021-05-03 13:55:39,861 INFO L78 Accepts]: Start accepts. Automaton has 9379 states and 29382 transitions. Word has length 24 [2021-05-03 13:55:39,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:39,861 INFO L480 AbstractCegarLoop]: Abstraction has 9379 states and 29382 transitions. [2021-05-03 13:55:39,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9379 states and 29382 transitions. [2021-05-03 13:55:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:39,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:39,873 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:40,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:40,073 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -94446641, now seen corresponding path program 341 times [2021-05-03 13:55:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:40,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016814063] [2021-05-03 13:55:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016814063] [2021-05-03 13:55:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232206317] [2021-05-03 13:55:40,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:40,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:55:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:40,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:40,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:40,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:55:40,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984227132] [2021-05-03 13:55:40,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:40,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:40,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:40,607 INFO L87 Difference]: Start difference. First operand 9379 states and 29382 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:42,877 INFO L93 Difference]: Finished difference Result 10146 states and 30795 transitions. [2021-05-03 13:55:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 13:55:42,878 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:42,891 INFO L225 Difference]: With dead ends: 10146 [2021-05-03 13:55:42,891 INFO L226 Difference]: Without dead ends: 10136 [2021-05-03 13:55:42,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1994.8ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 13:55:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-05-03 13:55:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8546. [2021-05-03 13:55:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8545 states have (on average 3.1049736688121707) internal successors, (26532), 8545 states have internal predecessors, (26532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 26532 transitions. [2021-05-03 13:55:43,018 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 26532 transitions. Word has length 24 [2021-05-03 13:55:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:43,018 INFO L480 AbstractCegarLoop]: Abstraction has 8546 states and 26532 transitions. [2021-05-03 13:55:43,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 26532 transitions. [2021-05-03 13:55:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:43,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:43,028 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:43,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-05-03 13:55:43,228 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash -128045869, now seen corresponding path program 342 times [2021-05-03 13:55:43,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:43,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22058800] [2021-05-03 13:55:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22058800] [2021-05-03 13:55:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582636201] [2021-05-03 13:55:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:43,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:55:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:43,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:43,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:43,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-05-03 13:55:43,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639904550] [2021-05-03 13:55:43,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:55:43,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:55:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:55:43,584 INFO L87 Difference]: Start difference. First operand 8546 states and 26532 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:45,787 INFO L93 Difference]: Finished difference Result 9224 states and 27859 transitions. [2021-05-03 13:55:45,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:55:45,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:45,804 INFO L225 Difference]: With dead ends: 9224 [2021-05-03 13:55:45,804 INFO L226 Difference]: Without dead ends: 9216 [2021-05-03 13:55:45,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1864.8ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 13:55:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-05-03 13:55:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 8570. [2021-05-03 13:55:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8570 states, 8569 states have (on average 3.104212860310421) internal successors, (26600), 8569 states have internal predecessors, (26600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8570 states to 8570 states and 26600 transitions. [2021-05-03 13:55:45,969 INFO L78 Accepts]: Start accepts. Automaton has 8570 states and 26600 transitions. Word has length 24 [2021-05-03 13:55:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:45,969 INFO L480 AbstractCegarLoop]: Abstraction has 8570 states and 26600 transitions. [2021-05-03 13:55:45,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:45,970 INFO L276 IsEmpty]: Start isEmpty. Operand 8570 states and 26600 transitions. [2021-05-03 13:55:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:45,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:45,982 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:46,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-05-03 13:55:46,183 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash 653566347, now seen corresponding path program 343 times [2021-05-03 13:55:46,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:46,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700089372] [2021-05-03 13:55:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700089372] [2021-05-03 13:55:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509124378] [2021-05-03 13:55:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:46,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:46,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:55:46,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765131942] [2021-05-03 13:55:46,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:46,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:46,758 INFO L87 Difference]: Start difference. First operand 8570 states and 26600 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:49,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:49,004 INFO L93 Difference]: Finished difference Result 10464 states and 31357 transitions. [2021-05-03 13:55:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 13:55:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:49,025 INFO L225 Difference]: With dead ends: 10464 [2021-05-03 13:55:49,025 INFO L226 Difference]: Without dead ends: 10443 [2021-05-03 13:55:49,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1907.3ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 13:55:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2021-05-03 13:55:49,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 9099. [2021-05-03 13:55:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9099 states, 9098 states have (on average 3.1227742360958453) internal successors, (28411), 9098 states have internal predecessors, (28411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9099 states to 9099 states and 28411 transitions. [2021-05-03 13:55:49,235 INFO L78 Accepts]: Start accepts. Automaton has 9099 states and 28411 transitions. Word has length 24 [2021-05-03 13:55:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:49,235 INFO L480 AbstractCegarLoop]: Abstraction has 9099 states and 28411 transitions. [2021-05-03 13:55:49,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9099 states and 28411 transitions. [2021-05-03 13:55:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:49,247 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:49,247 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:49,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:49,447 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash 188975243, now seen corresponding path program 344 times [2021-05-03 13:55:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526446092] [2021-05-03 13:55:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:49,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526446092] [2021-05-03 13:55:49,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815828080] [2021-05-03 13:55:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:49,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:55:49,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:49,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:49,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:55:49,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238458335] [2021-05-03 13:55:49,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:49,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:49,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:49,810 INFO L87 Difference]: Start difference. First operand 9099 states and 28411 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:51,729 INFO L93 Difference]: Finished difference Result 9961 states and 30084 transitions. [2021-05-03 13:55:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 13:55:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:51,748 INFO L225 Difference]: With dead ends: 9961 [2021-05-03 13:55:51,749 INFO L226 Difference]: Without dead ends: 9953 [2021-05-03 13:55:51,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 1664.8ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 13:55:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-05-03 13:55:51,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8603. [2021-05-03 13:55:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8603 states, 8602 states have (on average 3.106370611485701) internal successors, (26721), 8602 states have internal predecessors, (26721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8603 states to 8603 states and 26721 transitions. [2021-05-03 13:55:51,930 INFO L78 Accepts]: Start accepts. Automaton has 8603 states and 26721 transitions. Word has length 24 [2021-05-03 13:55:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:51,931 INFO L480 AbstractCegarLoop]: Abstraction has 8603 states and 26721 transitions. [2021-05-03 13:55:51,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 8603 states and 26721 transitions. [2021-05-03 13:55:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:51,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:51,943 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:52,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:52,143 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 155376015, now seen corresponding path program 345 times [2021-05-03 13:55:52,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:52,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799557484] [2021-05-03 13:55:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:52,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799557484] [2021-05-03 13:55:52,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138892609] [2021-05-03 13:55:52,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:52,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:55:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:52,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:52,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-05-03 13:55:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625407605] [2021-05-03 13:55:52,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:55:52,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:55:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:55:52,745 INFO L87 Difference]: Start difference. First operand 8603 states and 26721 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:55,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:55,549 INFO L93 Difference]: Finished difference Result 9572 states and 28782 transitions. [2021-05-03 13:55:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 13:55:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:55,565 INFO L225 Difference]: With dead ends: 9572 [2021-05-03 13:55:55,566 INFO L226 Difference]: Without dead ends: 9556 [2021-05-03 13:55:55,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2580.1ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:55:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9556 states. [2021-05-03 13:55:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9556 to 8460. [2021-05-03 13:55:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8460 states, 8459 states have (on average 3.1066319895968793) internal successors, (26279), 8459 states have internal predecessors, (26279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 26279 transitions. [2021-05-03 13:55:55,705 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 26279 transitions. Word has length 24 [2021-05-03 13:55:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:55,705 INFO L480 AbstractCegarLoop]: Abstraction has 8460 states and 26279 transitions. [2021-05-03 13:55:55,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 26279 transitions. [2021-05-03 13:55:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:55,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:55,716 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:55,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:55,917 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:55,917 INFO L82 PathProgramCache]: Analyzing trace with hash -886200053, now seen corresponding path program 346 times [2021-05-03 13:55:55,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:55,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17164094] [2021-05-03 13:55:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:56,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17164094] [2021-05-03 13:55:56,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052492932] [2021-05-03 13:55:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:56,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:56,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:56,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-05-03 13:55:56,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477815583] [2021-05-03 13:55:56,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:55:56,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:55:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:55:56,351 INFO L87 Difference]: Start difference. First operand 8460 states and 26279 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:57,854 INFO L93 Difference]: Finished difference Result 9239 states and 27893 transitions. [2021-05-03 13:55:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 13:55:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:55:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:57,868 INFO L225 Difference]: With dead ends: 9239 [2021-05-03 13:55:57,868 INFO L226 Difference]: Without dead ends: 9227 [2021-05-03 13:55:57,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 1410.3ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:55:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-05-03 13:55:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 8490. [2021-05-03 13:55:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8490 states, 8489 states have (on average 3.107197549770291) internal successors, (26377), 8489 states have internal predecessors, (26377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 26377 transitions. [2021-05-03 13:55:58,002 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 26377 transitions. Word has length 24 [2021-05-03 13:55:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:58,002 INFO L480 AbstractCegarLoop]: Abstraction has 8490 states and 26377 transitions. [2021-05-03 13:55:58,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 26377 transitions. [2021-05-03 13:55:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:55:58,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:58,013 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:58,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-05-03 13:55:58,214 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash 849710159, now seen corresponding path program 347 times [2021-05-03 13:55:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415982369] [2021-05-03 13:55:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:58,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415982369] [2021-05-03 13:55:58,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334533741] [2021-05-03 13:55:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:58,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:55:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:58,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:55:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:58,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:58,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:55:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050520611] [2021-05-03 13:55:58,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:55:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:55:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:55:58,808 INFO L87 Difference]: Start difference. First operand 8490 states and 26377 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:00,942 INFO L93 Difference]: Finished difference Result 10604 states and 31742 transitions. [2021-05-03 13:56:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 13:56:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:00,961 INFO L225 Difference]: With dead ends: 10604 [2021-05-03 13:56:00,961 INFO L226 Difference]: Without dead ends: 10586 [2021-05-03 13:56:00,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1923.1ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:56:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10586 states. [2021-05-03 13:56:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10586 to 8963. [2021-05-03 13:56:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 8962 states have (on average 3.121513055121625) internal successors, (27975), 8962 states have internal predecessors, (27975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 27975 transitions. [2021-05-03 13:56:01,123 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 27975 transitions. Word has length 24 [2021-05-03 13:56:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:01,123 INFO L480 AbstractCegarLoop]: Abstraction has 8963 states and 27975 transitions. [2021-05-03 13:56:01,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 27975 transitions. [2021-05-03 13:56:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:01,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:01,136 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:01,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-05-03 13:56:01,337 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash 385119055, now seen corresponding path program 348 times [2021-05-03 13:56:01,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:01,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567477479] [2021-05-03 13:56:01,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:01,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567477479] [2021-05-03 13:56:01,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424428770] [2021-05-03 13:56:01,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:01,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:56:01,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:01,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:01,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:01,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:56:01,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414601176] [2021-05-03 13:56:01,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:56:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:56:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:56:01,825 INFO L87 Difference]: Start difference. First operand 8963 states and 27975 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:03,795 INFO L93 Difference]: Finished difference Result 9967 states and 30031 transitions. [2021-05-03 13:56:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-03 13:56:03,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:03,810 INFO L225 Difference]: With dead ends: 9967 [2021-05-03 13:56:03,810 INFO L226 Difference]: Without dead ends: 9961 [2021-05-03 13:56:03,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 1792.8ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 13:56:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-05-03 13:56:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8724. [2021-05-03 13:56:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8724 states, 8723 states have (on average 3.112690588100424) internal successors, (27152), 8723 states have internal predecessors, (27152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8724 states to 8724 states and 27152 transitions. [2021-05-03 13:56:03,947 INFO L78 Accepts]: Start accepts. Automaton has 8724 states and 27152 transitions. Word has length 24 [2021-05-03 13:56:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:03,947 INFO L480 AbstractCegarLoop]: Abstraction has 8724 states and 27152 transitions. [2021-05-03 13:56:03,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8724 states and 27152 transitions. [2021-05-03 13:56:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:03,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:03,958 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:04,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:04,158 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash 351519827, now seen corresponding path program 349 times [2021-05-03 13:56:04,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:04,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557367579] [2021-05-03 13:56:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:04,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557367579] [2021-05-03 13:56:04,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138241486] [2021-05-03 13:56:04,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:04,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:04,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-05-03 13:56:04,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015690855] [2021-05-03 13:56:04,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:56:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:56:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:56:04,738 INFO L87 Difference]: Start difference. First operand 8724 states and 27152 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:07,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:07,848 INFO L93 Difference]: Finished difference Result 9884 states and 29758 transitions. [2021-05-03 13:56:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 13:56:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:07,866 INFO L225 Difference]: With dead ends: 9884 [2021-05-03 13:56:07,866 INFO L226 Difference]: Without dead ends: 9874 [2021-05-03 13:56:07,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2836.4ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 13:56:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-05-03 13:56:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 8701. [2021-05-03 13:56:08,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 3.1133333333333333) internal successors, (27086), 8700 states have internal predecessors, (27086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 27086 transitions. [2021-05-03 13:56:08,037 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 27086 transitions. Word has length 24 [2021-05-03 13:56:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:08,037 INFO L480 AbstractCegarLoop]: Abstraction has 8701 states and 27086 transitions. [2021-05-03 13:56:08,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 27086 transitions. [2021-05-03 13:56:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:08,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:08,049 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:08,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-05-03 13:56:08,249 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash -690056241, now seen corresponding path program 350 times [2021-05-03 13:56:08,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:08,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686859426] [2021-05-03 13:56:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:08,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686859426] [2021-05-03 13:56:08,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954878093] [2021-05-03 13:56:08,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:08,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:56:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:08,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:08,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-03 13:56:08,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710513699] [2021-05-03 13:56:08,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:56:08,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:56:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:56:08,685 INFO L87 Difference]: Start difference. First operand 8701 states and 27086 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:10,511 INFO L93 Difference]: Finished difference Result 9922 states and 29903 transitions. [2021-05-03 13:56:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:56:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:10,528 INFO L225 Difference]: With dead ends: 9922 [2021-05-03 13:56:10,529 INFO L226 Difference]: Without dead ends: 9904 [2021-05-03 13:56:10,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 1698.2ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 13:56:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9904 states. [2021-05-03 13:56:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9904 to 8685. [2021-05-03 13:56:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 3.1182634730538923) internal successors, (27079), 8684 states have internal predecessors, (27079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 27079 transitions. [2021-05-03 13:56:10,672 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 27079 transitions. Word has length 24 [2021-05-03 13:56:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:10,672 INFO L480 AbstractCegarLoop]: Abstraction has 8685 states and 27079 transitions. [2021-05-03 13:56:10,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:10,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 27079 transitions. [2021-05-03 13:56:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:10,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:10,683 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:10,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:10,884 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:10,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1380824019, now seen corresponding path program 351 times [2021-05-03 13:56:10,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:10,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302762195] [2021-05-03 13:56:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:11,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302762195] [2021-05-03 13:56:11,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528597065] [2021-05-03 13:56:11,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:11,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:56:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:11,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:11,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:11,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:11,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 13:56:11,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512644251] [2021-05-03 13:56:11,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:56:11,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:11,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:56:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:56:11,558 INFO L87 Difference]: Start difference. First operand 8685 states and 27079 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:13,980 INFO L93 Difference]: Finished difference Result 9621 states and 29138 transitions. [2021-05-03 13:56:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 13:56:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:13,997 INFO L225 Difference]: With dead ends: 9621 [2021-05-03 13:56:13,997 INFO L226 Difference]: Without dead ends: 9605 [2021-05-03 13:56:13,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 2327.9ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:56:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-05-03 13:56:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 8716. [2021-05-03 13:56:14,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8715 states have (on average 3.119219736087206) internal successors, (27184), 8715 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 27184 transitions. [2021-05-03 13:56:14,179 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 27184 transitions. Word has length 24 [2021-05-03 13:56:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:14,179 INFO L480 AbstractCegarLoop]: Abstraction has 8716 states and 27184 transitions. [2021-05-03 13:56:14,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 27184 transitions. [2021-05-03 13:56:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:14,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:14,191 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:14,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-05-03 13:56:14,392 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1659766261, now seen corresponding path program 352 times [2021-05-03 13:56:14,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:14,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971243681] [2021-05-03 13:56:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971243681] [2021-05-03 13:56:14,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256065403] [2021-05-03 13:56:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:14,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:56:14,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:14,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:14,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-05-03 13:56:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929784769] [2021-05-03 13:56:14,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:56:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:56:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:56:14,925 INFO L87 Difference]: Start difference. First operand 8716 states and 27184 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:16,480 INFO L93 Difference]: Finished difference Result 11348 states and 34100 transitions. [2021-05-03 13:56:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 13:56:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:16,499 INFO L225 Difference]: With dead ends: 11348 [2021-05-03 13:56:16,499 INFO L226 Difference]: Without dead ends: 11333 [2021-05-03 13:56:16,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1423.1ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:56:16,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11333 states. [2021-05-03 13:56:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11333 to 9625. [2021-05-03 13:56:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 3.1397547797173733) internal successors, (30217), 9624 states have internal predecessors, (30217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 30217 transitions. [2021-05-03 13:56:16,661 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 30217 transitions. Word has length 24 [2021-05-03 13:56:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:16,661 INFO L480 AbstractCegarLoop]: Abstraction has 9625 states and 30217 transitions. [2021-05-03 13:56:16,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 30217 transitions. [2021-05-03 13:56:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:16,672 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:16,672 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:16,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:16,873 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2124357365, now seen corresponding path program 353 times [2021-05-03 13:56:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:16,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502161625] [2021-05-03 13:56:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502161625] [2021-05-03 13:56:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856835217] [2021-05-03 13:56:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:16,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:56:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:16,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:17,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:17,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-05-03 13:56:17,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210418207] [2021-05-03 13:56:17,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:56:17,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:56:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:56:17,247 INFO L87 Difference]: Start difference. First operand 9625 states and 30217 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:20,786 INFO L93 Difference]: Finished difference Result 10893 states and 32965 transitions. [2021-05-03 13:56:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 13:56:20,789 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:20,810 INFO L225 Difference]: With dead ends: 10893 [2021-05-03 13:56:20,810 INFO L226 Difference]: Without dead ends: 10887 [2021-05-03 13:56:20,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 3051.2ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-05-03 13:56:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-05-03 13:56:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 9443. [2021-05-03 13:56:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9443 states, 9442 states have (on average 3.133869942808727) internal successors, (29590), 9442 states have internal predecessors, (29590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9443 states to 9443 states and 29590 transitions. [2021-05-03 13:56:20,998 INFO L78 Accepts]: Start accepts. Automaton has 9443 states and 29590 transitions. Word has length 24 [2021-05-03 13:56:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:20,999 INFO L480 AbstractCegarLoop]: Abstraction has 9443 states and 29590 transitions. [2021-05-03 13:56:20,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 9443 states and 29590 transitions. [2021-05-03 13:56:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:21,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:21,013 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:21,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable646 [2021-05-03 13:56:21,213 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:21,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:21,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2137010703, now seen corresponding path program 354 times [2021-05-03 13:56:21,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:21,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807684769] [2021-05-03 13:56:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:21,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807684769] [2021-05-03 13:56:21,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356659640] [2021-05-03 13:56:21,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:21,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:56:21,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:21,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:21,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-05-03 13:56:21,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680141777] [2021-05-03 13:56:21,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:56:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:56:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:56:21,823 INFO L87 Difference]: Start difference. First operand 9443 states and 29590 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:24,134 INFO L93 Difference]: Finished difference Result 10963 states and 33243 transitions. [2021-05-03 13:56:24,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-03 13:56:24,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:24,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:24,152 INFO L225 Difference]: With dead ends: 10963 [2021-05-03 13:56:24,152 INFO L226 Difference]: Without dead ends: 10955 [2021-05-03 13:56:24,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 2161.7ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-05-03 13:56:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2021-05-03 13:56:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 9488. [2021-05-03 13:56:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9488 states, 9487 states have (on average 3.1347106566880996) internal successors, (29739), 9487 states have internal predecessors, (29739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9488 states to 9488 states and 29739 transitions. [2021-05-03 13:56:24,350 INFO L78 Accepts]: Start accepts. Automaton has 9488 states and 29739 transitions. Word has length 24 [2021-05-03 13:56:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:24,350 INFO L480 AbstractCegarLoop]: Abstraction has 9488 states and 29739 transitions. [2021-05-03 13:56:24,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9488 states and 29739 transitions. [2021-05-03 13:56:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:24,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:24,363 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:24,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:24,563 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:24,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1095434635, now seen corresponding path program 355 times [2021-05-03 13:56:24,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:24,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708733773] [2021-05-03 13:56:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708733773] [2021-05-03 13:56:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845901653] [2021-05-03 13:56:24,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:24,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:24,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:25,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:25,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-03 13:56:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521712368] [2021-05-03 13:56:25,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:56:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:56:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:56:25,078 INFO L87 Difference]: Start difference. First operand 9488 states and 29739 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:28,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:28,165 INFO L93 Difference]: Finished difference Result 11074 states and 33620 transitions. [2021-05-03 13:56:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 13:56:28,167 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:28,183 INFO L225 Difference]: With dead ends: 11074 [2021-05-03 13:56:28,183 INFO L226 Difference]: Without dead ends: 11062 [2021-05-03 13:56:28,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 2811.4ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 13:56:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2021-05-03 13:56:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 9716. [2021-05-03 13:56:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9716 states, 9715 states have (on average 3.138548636129696) internal successors, (30491), 9715 states have internal predecessors, (30491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9716 states to 9716 states and 30491 transitions. [2021-05-03 13:56:28,354 INFO L78 Accepts]: Start accepts. Automaton has 9716 states and 30491 transitions. Word has length 24 [2021-05-03 13:56:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:28,354 INFO L480 AbstractCegarLoop]: Abstraction has 9716 states and 30491 transitions. [2021-05-03 13:56:28,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 9716 states and 30491 transitions. [2021-05-03 13:56:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:28,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:28,369 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:28,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable648 [2021-05-03 13:56:28,569 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1128652401, now seen corresponding path program 356 times [2021-05-03 13:56:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:28,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117555048] [2021-05-03 13:56:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117555048] [2021-05-03 13:56:28,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113269341] [2021-05-03 13:56:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:56:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:29,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:29,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-05-03 13:56:29,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426037545] [2021-05-03 13:56:29,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:56:29,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:56:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:56:29,288 INFO L87 Difference]: Start difference. First operand 9716 states and 30491 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:31,512 INFO L93 Difference]: Finished difference Result 11386 states and 34650 transitions. [2021-05-03 13:56:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 13:56:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:31,529 INFO L225 Difference]: With dead ends: 11386 [2021-05-03 13:56:31,529 INFO L226 Difference]: Without dead ends: 11370 [2021-05-03 13:56:31,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 2256.3ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 13:56:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11370 states. [2021-05-03 13:56:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11370 to 9979. [2021-05-03 13:56:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 3.1449188214070958) internal successors, (31380), 9978 states have internal predecessors, (31380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 31380 transitions. [2021-05-03 13:56:31,684 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 31380 transitions. Word has length 24 [2021-05-03 13:56:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:31,684 INFO L480 AbstractCegarLoop]: Abstraction has 9979 states and 31380 transitions. [2021-05-03 13:56:31,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 31380 transitions. [2021-05-03 13:56:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:31,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:31,696 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:31,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:31,896 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1355873781, now seen corresponding path program 357 times [2021-05-03 13:56:31,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:31,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186289327] [2021-05-03 13:56:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186289327] [2021-05-03 13:56:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701452108] [2021-05-03 13:56:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:32,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:56:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:32,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:32,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-05-03 13:56:32,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491195685] [2021-05-03 13:56:32,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 13:56:32,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:32,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 13:56:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:56:32,407 INFO L87 Difference]: Start difference. First operand 9979 states and 31380 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:34,592 INFO L93 Difference]: Finished difference Result 11190 states and 34200 transitions. [2021-05-03 13:56:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 13:56:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:34,615 INFO L225 Difference]: With dead ends: 11190 [2021-05-03 13:56:34,615 INFO L226 Difference]: Without dead ends: 11170 [2021-05-03 13:56:34,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 2057.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 13:56:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11170 states. [2021-05-03 13:56:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11170 to 10023. [2021-05-03 13:56:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10023 states, 10022 states have (on average 3.1446817002594294) internal successors, (31516), 10022 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10023 states to 10023 states and 31516 transitions. [2021-05-03 13:56:34,838 INFO L78 Accepts]: Start accepts. Automaton has 10023 states and 31516 transitions. Word has length 24 [2021-05-03 13:56:34,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:34,838 INFO L480 AbstractCegarLoop]: Abstraction has 10023 states and 31516 transitions. [2021-05-03 13:56:34,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10023 states and 31516 transitions. [2021-05-03 13:56:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:34,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:34,852 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:35,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-05-03 13:56:35,053 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:35,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2144123953, now seen corresponding path program 358 times [2021-05-03 13:56:35,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:35,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566946958] [2021-05-03 13:56:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566946958] [2021-05-03 13:56:35,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61207774] [2021-05-03 13:56:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:35,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:56:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:35,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:35,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-05-03 13:56:35,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955511597] [2021-05-03 13:56:35,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:56:35,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:56:35,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:56:35,740 INFO L87 Difference]: Start difference. First operand 10023 states and 31516 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:38,163 INFO L93 Difference]: Finished difference Result 14250 states and 43629 transitions. [2021-05-03 13:56:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 13:56:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:38,188 INFO L225 Difference]: With dead ends: 14250 [2021-05-03 13:56:38,188 INFO L226 Difference]: Without dead ends: 14238 [2021-05-03 13:56:38,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 2141.0ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:56:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14238 states. [2021-05-03 13:56:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14238 to 11906. [2021-05-03 13:56:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11906 states, 11905 states have (on average 3.1850482990340194) internal successors, (37918), 11905 states have internal predecessors, (37918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11906 states to 11906 states and 37918 transitions. [2021-05-03 13:56:38,407 INFO L78 Accepts]: Start accepts. Automaton has 11906 states and 37918 transitions. Word has length 24 [2021-05-03 13:56:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:38,407 INFO L480 AbstractCegarLoop]: Abstraction has 11906 states and 37918 transitions. [2021-05-03 13:56:38,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 11906 states and 37918 transitions. [2021-05-03 13:56:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:38,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:38,421 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:38,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable651,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:38,622 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:38,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1686252239, now seen corresponding path program 359 times [2021-05-03 13:56:38,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:38,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034982360] [2021-05-03 13:56:38,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:38,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034982360] [2021-05-03 13:56:38,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125016894] [2021-05-03 13:56:38,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:38,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:56:38,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:38,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:38,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:39,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:39,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-05-03 13:56:39,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580142532] [2021-05-03 13:56:39,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:56:39,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:56:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:56:39,029 INFO L87 Difference]: Start difference. First operand 11906 states and 37918 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:42,306 INFO L93 Difference]: Finished difference Result 13468 states and 41406 transitions. [2021-05-03 13:56:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-03 13:56:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:42,333 INFO L225 Difference]: With dead ends: 13468 [2021-05-03 13:56:42,333 INFO L226 Difference]: Without dead ends: 13464 [2021-05-03 13:56:42,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4938 ImplicationChecksByTransitivity, 2874.2ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 13:56:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13464 states. [2021-05-03 13:56:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13464 to 11668. [2021-05-03 13:56:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11668 states, 11667 states have (on average 3.1784520442273076) internal successors, (37083), 11667 states have internal predecessors, (37083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11668 states to 11668 states and 37083 transitions. [2021-05-03 13:56:42,562 INFO L78 Accepts]: Start accepts. Automaton has 11668 states and 37083 transitions. Word has length 24 [2021-05-03 13:56:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:42,562 INFO L480 AbstractCegarLoop]: Abstraction has 11668 states and 37083 transitions. [2021-05-03 13:56:42,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11668 states and 37083 transitions. [2021-05-03 13:56:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:42,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:42,580 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:42,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-05-03 13:56:42,780 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1652653011, now seen corresponding path program 360 times [2021-05-03 13:56:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:42,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742497740] [2021-05-03 13:56:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:42,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742497740] [2021-05-03 13:56:42,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025503129] [2021-05-03 13:56:42,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:42,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:56:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:43,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:43,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-05-03 13:56:43,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428711750] [2021-05-03 13:56:43,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:56:43,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:56:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:56:43,467 INFO L87 Difference]: Start difference. First operand 11668 states and 37083 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:46,644 INFO L93 Difference]: Finished difference Result 13667 states and 42198 transitions. [2021-05-03 13:56:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 13:56:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:46,669 INFO L225 Difference]: With dead ends: 13667 [2021-05-03 13:56:46,669 INFO L226 Difference]: Without dead ends: 13659 [2021-05-03 13:56:46,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 2968.1ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 13:56:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-05-03 13:56:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 11875. [2021-05-03 13:56:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11875 states, 11874 states have (on average 3.1847734546067037) internal successors, (37816), 11874 states have internal predecessors, (37816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11875 states to 11875 states and 37816 transitions. [2021-05-03 13:56:46,885 INFO L78 Accepts]: Start accepts. Automaton has 11875 states and 37816 transitions. Word has length 24 [2021-05-03 13:56:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:46,885 INFO L480 AbstractCegarLoop]: Abstraction has 11875 states and 37816 transitions. [2021-05-03 13:56:46,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11875 states and 37816 transitions. [2021-05-03 13:56:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:46,900 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:46,900 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:47,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-05-03 13:56:47,100 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash 611076943, now seen corresponding path program 361 times [2021-05-03 13:56:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:47,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979653088] [2021-05-03 13:56:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:47,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979653088] [2021-05-03 13:56:47,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186669040] [2021-05-03 13:56:47,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:47,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:47,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-05-03 13:56:47,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136193600] [2021-05-03 13:56:47,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:56:47,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:47,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:56:47,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:56:47,523 INFO L87 Difference]: Start difference. First operand 11875 states and 37816 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:51,159 INFO L93 Difference]: Finished difference Result 14012 states and 43421 transitions. [2021-05-03 13:56:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 13:56:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:51,187 INFO L225 Difference]: With dead ends: 14012 [2021-05-03 13:56:51,187 INFO L226 Difference]: Without dead ends: 14000 [2021-05-03 13:56:51,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 3118.8ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 13:56:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2021-05-03 13:56:51,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 12230. [2021-05-03 13:56:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12229 states have (on average 3.1900400686891817) internal successors, (39011), 12229 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 39011 transitions. [2021-05-03 13:56:51,454 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 39011 transitions. Word has length 24 [2021-05-03 13:56:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:51,454 INFO L480 AbstractCegarLoop]: Abstraction has 12230 states and 39011 transitions. [2021-05-03 13:56:51,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 39011 transitions. [2021-05-03 13:56:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:51,471 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:51,471 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:51,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:51,672 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:51,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1613010093, now seen corresponding path program 362 times [2021-05-03 13:56:51,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:51,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147409960] [2021-05-03 13:56:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147409960] [2021-05-03 13:56:51,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15309790] [2021-05-03 13:56:51,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:51,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:56:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:52,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:52,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-05-03 13:56:52,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783414697] [2021-05-03 13:56:52,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:56:52,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:52,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:56:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:56:52,237 INFO L87 Difference]: Start difference. First operand 12230 states and 39011 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:54,381 INFO L93 Difference]: Finished difference Result 14528 states and 45137 transitions. [2021-05-03 13:56:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 13:56:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:54,408 INFO L225 Difference]: With dead ends: 14528 [2021-05-03 13:56:54,408 INFO L226 Difference]: Without dead ends: 14512 [2021-05-03 13:56:54,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1984.4ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 13:56:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-05-03 13:56:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 13019. [2021-05-03 13:56:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13019 states, 13018 states have (on average 3.197649408511292) internal successors, (41627), 13018 states have internal predecessors, (41627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13019 states to 13019 states and 41627 transitions. [2021-05-03 13:56:54,646 INFO L78 Accepts]: Start accepts. Automaton has 13019 states and 41627 transitions. Word has length 24 [2021-05-03 13:56:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:54,646 INFO L480 AbstractCegarLoop]: Abstraction has 13019 states and 41627 transitions. [2021-05-03 13:56:54,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13019 states and 41627 transitions. [2021-05-03 13:56:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:54,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:54,735 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:54,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-05-03 13:56:54,935 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:54,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1840231473, now seen corresponding path program 363 times [2021-05-03 13:56:54,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:54,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519722532] [2021-05-03 13:56:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519722532] [2021-05-03 13:56:55,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374665143] [2021-05-03 13:56:55,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:55,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:56:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:55,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:56:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:55,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:55,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-05-03 13:56:55,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316213943] [2021-05-03 13:56:55,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 13:56:55,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 13:56:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:56:55,771 INFO L87 Difference]: Start difference. First operand 13019 states and 41627 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:59,261 INFO L93 Difference]: Finished difference Result 15354 states and 47888 transitions. [2021-05-03 13:56:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 13:56:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:56:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:59,297 INFO L225 Difference]: With dead ends: 15354 [2021-05-03 13:56:59,297 INFO L226 Difference]: Without dead ends: 15334 [2021-05-03 13:56:59,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 3290.8ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:56:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15334 states. [2021-05-03 13:56:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15334 to 13814. [2021-05-03 13:56:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13814 states, 13813 states have (on average 3.2055310215014843) internal successors, (44278), 13813 states have internal predecessors, (44278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:59,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13814 states to 13814 states and 44278 transitions. [2021-05-03 13:56:59,582 INFO L78 Accepts]: Start accepts. Automaton has 13814 states and 44278 transitions. Word has length 24 [2021-05-03 13:56:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:59,582 INFO L480 AbstractCegarLoop]: Abstraction has 13814 states and 44278 transitions. [2021-05-03 13:56:59,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 13814 states and 44278 transitions. [2021-05-03 13:56:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:56:59,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:59,606 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:59,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable656,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:59,807 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash -294159661, now seen corresponding path program 364 times [2021-05-03 13:56:59,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:59,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45625248] [2021-05-03 13:56:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45625248] [2021-05-03 13:57:00,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253585500] [2021-05-03 13:57:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:00,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:00,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:00,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:00,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 13:57:00,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905166696] [2021-05-03 13:57:00,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 13:57:00,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:00,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 13:57:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:57:00,418 INFO L87 Difference]: Start difference. First operand 13814 states and 44278 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:02,073 INFO L93 Difference]: Finished difference Result 15273 states and 47830 transitions. [2021-05-03 13:57:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 13:57:02,074 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:02,097 INFO L225 Difference]: With dead ends: 15273 [2021-05-03 13:57:02,097 INFO L226 Difference]: Without dead ends: 15249 [2021-05-03 13:57:02,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 1682.6ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 13:57:02,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15249 states. [2021-05-03 13:57:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15249 to 13872. [2021-05-03 13:57:02,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13872 states, 13871 states have (on average 3.205248359887535) internal successors, (44460), 13871 states have internal predecessors, (44460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13872 states to 13872 states and 44460 transitions. [2021-05-03 13:57:02,338 INFO L78 Accepts]: Start accepts. Automaton has 13872 states and 44460 transitions. Word has length 24 [2021-05-03 13:57:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:02,338 INFO L480 AbstractCegarLoop]: Abstraction has 13872 states and 44460 transitions. [2021-05-03 13:57:02,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 13872 states and 44460 transitions. [2021-05-03 13:57:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:02,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:02,356 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:02,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-03 13:57:02,556 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:02,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1105251501, now seen corresponding path program 365 times [2021-05-03 13:57:02,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:02,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610694566] [2021-05-03 13:57:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610694566] [2021-05-03 13:57:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982280037] [2021-05-03 13:57:02,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:02,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:57:02,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:02,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:03,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:03,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-05-03 13:57:03,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599889429] [2021-05-03 13:57:03,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:57:03,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:57:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:57:03,119 INFO L87 Difference]: Start difference. First operand 13872 states and 44460 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:03,592 INFO L93 Difference]: Finished difference Result 16092 states and 50859 transitions. [2021-05-03 13:57:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:57:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:03,623 INFO L225 Difference]: With dead ends: 16092 [2021-05-03 13:57:03,624 INFO L226 Difference]: Without dead ends: 16092 [2021-05-03 13:57:03,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:57:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-05-03 13:57:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 13964. [2021-05-03 13:57:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13964 states, 13963 states have (on average 3.2041108644274154) internal successors, (44739), 13963 states have internal predecessors, (44739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:03,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13964 states to 13964 states and 44739 transitions. [2021-05-03 13:57:03,980 INFO L78 Accepts]: Start accepts. Automaton has 13964 states and 44739 transitions. Word has length 24 [2021-05-03 13:57:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:03,980 INFO L480 AbstractCegarLoop]: Abstraction has 13964 states and 44739 transitions. [2021-05-03 13:57:03,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 13964 states and 44739 transitions. [2021-05-03 13:57:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:04,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:04,001 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:04,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:04,202 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -299012217, now seen corresponding path program 366 times [2021-05-03 13:57:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:04,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825535677] [2021-05-03 13:57:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825535677] [2021-05-03 13:57:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482292996] [2021-05-03 13:57:04,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:04,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:57:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:04,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:04,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:04,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658931959] [2021-05-03 13:57:04,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:04,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:04,871 INFO L87 Difference]: Start difference. First operand 13964 states and 44739 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:05,688 INFO L93 Difference]: Finished difference Result 14987 states and 47521 transitions. [2021-05-03 13:57:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:57:05,690 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:05,718 INFO L225 Difference]: With dead ends: 14987 [2021-05-03 13:57:05,718 INFO L226 Difference]: Without dead ends: 14987 [2021-05-03 13:57:05,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 826.4ms TimeCoverageRelationStatistics Valid=418, Invalid=842, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:57:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14987 states. [2021-05-03 13:57:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14987 to 14007. [2021-05-03 13:57:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14006 states have (on average 3.203484221048122) internal successors, (44868), 14006 states have internal predecessors, (44868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 44868 transitions. [2021-05-03 13:57:05,966 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 44868 transitions. Word has length 24 [2021-05-03 13:57:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:05,966 INFO L480 AbstractCegarLoop]: Abstraction has 14007 states and 44868 transitions. [2021-05-03 13:57:05,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 44868 transitions. [2021-05-03 13:57:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:05,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:05,987 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:06,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:06,187 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash 549610255, now seen corresponding path program 367 times [2021-05-03 13:57:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773521765] [2021-05-03 13:57:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:06,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773521765] [2021-05-03 13:57:06,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038598754] [2021-05-03 13:57:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:06,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:06,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:06,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776540710] [2021-05-03 13:57:06,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:06,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:06,576 INFO L87 Difference]: Start difference. First operand 14007 states and 44868 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:07,589 INFO L93 Difference]: Finished difference Result 15501 states and 48982 transitions. [2021-05-03 13:57:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:57:07,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:07,613 INFO L225 Difference]: With dead ends: 15501 [2021-05-03 13:57:07,613 INFO L226 Difference]: Without dead ends: 15501 [2021-05-03 13:57:07,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 703.3ms TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 13:57:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15501 states. [2021-05-03 13:57:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15501 to 14056. [2021-05-03 13:57:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14056 states, 14055 states have (on average 3.2027748132337246) internal successors, (45015), 14055 states have internal predecessors, (45015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 45015 transitions. [2021-05-03 13:57:07,923 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 45015 transitions. Word has length 24 [2021-05-03 13:57:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:07,923 INFO L480 AbstractCegarLoop]: Abstraction has 14056 states and 45015 transitions. [2021-05-03 13:57:07,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 45015 transitions. [2021-05-03 13:57:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:07,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:07,943 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:08,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-05-03 13:57:08,144 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2055414137, now seen corresponding path program 368 times [2021-05-03 13:57:08,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:08,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353717834] [2021-05-03 13:57:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353717834] [2021-05-03 13:57:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406118042] [2021-05-03 13:57:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:08,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:57:08,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:08,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:08,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:08,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458735753] [2021-05-03 13:57:08,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:08,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:08,517 INFO L87 Difference]: Start difference. First operand 14056 states and 45015 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:10,598 INFO L93 Difference]: Finished difference Result 15602 states and 49176 transitions. [2021-05-03 13:57:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:57:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:10,632 INFO L225 Difference]: With dead ends: 15602 [2021-05-03 13:57:10,632 INFO L226 Difference]: Without dead ends: 15602 [2021-05-03 13:57:10,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1566.0ms TimeCoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 13:57:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15602 states. [2021-05-03 13:57:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15602 to 14172. [2021-05-03 13:57:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14172 states, 14171 states have (on average 3.2011149530731777) internal successors, (45363), 14171 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14172 states to 14172 states and 45363 transitions. [2021-05-03 13:57:10,883 INFO L78 Accepts]: Start accepts. Automaton has 14172 states and 45363 transitions. Word has length 24 [2021-05-03 13:57:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:10,883 INFO L480 AbstractCegarLoop]: Abstraction has 14172 states and 45363 transitions. [2021-05-03 13:57:10,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 14172 states and 45363 transitions. [2021-05-03 13:57:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:10,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:10,904 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:11,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-05-03 13:57:11,109 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1169615857, now seen corresponding path program 369 times [2021-05-03 13:57:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:11,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767606733] [2021-05-03 13:57:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:11,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767606733] [2021-05-03 13:57:11,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731885566] [2021-05-03 13:57:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:57:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:11,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:11,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:11,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376108645] [2021-05-03 13:57:11,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:11,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:11,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:11,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:11,681 INFO L87 Difference]: Start difference. First operand 14172 states and 45363 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:13,512 INFO L93 Difference]: Finished difference Result 15707 states and 49378 transitions. [2021-05-03 13:57:13,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:57:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:13,537 INFO L225 Difference]: With dead ends: 15707 [2021-05-03 13:57:13,537 INFO L226 Difference]: Without dead ends: 15707 [2021-05-03 13:57:13,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1553.3ms TimeCoverageRelationStatistics Valid=1756, Invalid=3500, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 13:57:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15707 states. [2021-05-03 13:57:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15707 to 14281. [2021-05-03 13:57:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14281 states, 14280 states have (on average 3.1997198879551823) internal successors, (45692), 14280 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14281 states to 14281 states and 45692 transitions. [2021-05-03 13:57:13,775 INFO L78 Accepts]: Start accepts. Automaton has 14281 states and 45692 transitions. Word has length 24 [2021-05-03 13:57:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:13,775 INFO L480 AbstractCegarLoop]: Abstraction has 14281 states and 45692 transitions. [2021-05-03 13:57:13,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14281 states and 45692 transitions. [2021-05-03 13:57:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:13,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:13,795 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:13,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-05-03 13:57:13,995 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:14,001 INFO L82 PathProgramCache]: Analyzing trace with hash 937168263, now seen corresponding path program 370 times [2021-05-03 13:57:14,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:14,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928169753] [2021-05-03 13:57:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928169753] [2021-05-03 13:57:14,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798119705] [2021-05-03 13:57:14,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:14,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:14,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:14,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:14,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:14,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812727705] [2021-05-03 13:57:14,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:14,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:14,415 INFO L87 Difference]: Start difference. First operand 14281 states and 45692 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:18,041 INFO L93 Difference]: Finished difference Result 15913 states and 49910 transitions. [2021-05-03 13:57:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 13:57:18,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:18,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:18,075 INFO L225 Difference]: With dead ends: 15913 [2021-05-03 13:57:18,075 INFO L226 Difference]: Without dead ends: 15913 [2021-05-03 13:57:18,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2534.6ms TimeCoverageRelationStatistics Valid=2091, Invalid=4071, Unknown=0, NotChecked=0, Total=6162 [2021-05-03 13:57:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15913 states. [2021-05-03 13:57:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15913 to 14413. [2021-05-03 13:57:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14413 states, 14412 states have (on average 3.1991396058839854) internal successors, (46106), 14412 states have internal predecessors, (46106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14413 states to 14413 states and 46106 transitions. [2021-05-03 13:57:18,344 INFO L78 Accepts]: Start accepts. Automaton has 14413 states and 46106 transitions. Word has length 24 [2021-05-03 13:57:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:18,344 INFO L480 AbstractCegarLoop]: Abstraction has 14413 states and 46106 transitions. [2021-05-03 13:57:18,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14413 states and 46106 transitions. [2021-05-03 13:57:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:18,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:18,368 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:18,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-05-03 13:57:18,568 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1211628273, now seen corresponding path program 371 times [2021-05-03 13:57:18,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:18,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801184062] [2021-05-03 13:57:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:18,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801184062] [2021-05-03 13:57:18,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802349224] [2021-05-03 13:57:18,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:18,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:57:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:18,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:19,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:19,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:19,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388922118] [2021-05-03 13:57:19,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:19,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:19,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:19,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:19,196 INFO L87 Difference]: Start difference. First operand 14413 states and 46106 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:21,166 INFO L93 Difference]: Finished difference Result 16226 states and 50863 transitions. [2021-05-03 13:57:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 13:57:21,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:21,191 INFO L225 Difference]: With dead ends: 16226 [2021-05-03 13:57:21,191 INFO L226 Difference]: Without dead ends: 16226 [2021-05-03 13:57:21,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 1737.4ms TimeCoverageRelationStatistics Valid=2135, Invalid=3871, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 13:57:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16226 states. [2021-05-03 13:57:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16226 to 14455. [2021-05-03 13:57:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14454 states have (on average 3.204649232046492) internal successors, (46320), 14454 states have internal predecessors, (46320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 46320 transitions. [2021-05-03 13:57:21,481 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 46320 transitions. Word has length 24 [2021-05-03 13:57:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:21,481 INFO L480 AbstractCegarLoop]: Abstraction has 14455 states and 46320 transitions. [2021-05-03 13:57:21,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 46320 transitions. [2021-05-03 13:57:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:21,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:21,499 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:21,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-05-03 13:57:21,699 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash -640173467, now seen corresponding path program 372 times [2021-05-03 13:57:21,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:21,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99828000] [2021-05-03 13:57:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:21,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99828000] [2021-05-03 13:57:21,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469748144] [2021-05-03 13:57:21,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:21,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:57:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:22,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:22,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:22,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733338698] [2021-05-03 13:57:22,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:22,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:22,098 INFO L87 Difference]: Start difference. First operand 14455 states and 46320 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:25,153 INFO L93 Difference]: Finished difference Result 15474 states and 48762 transitions. [2021-05-03 13:57:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:57:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:25,186 INFO L225 Difference]: With dead ends: 15474 [2021-05-03 13:57:25,186 INFO L226 Difference]: Without dead ends: 15468 [2021-05-03 13:57:25,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2484.8ms TimeCoverageRelationStatistics Valid=2587, Invalid=4895, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 13:57:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15468 states. [2021-05-03 13:57:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15468 to 13787. [2021-05-03 13:57:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13787 states, 13786 states have (on average 3.198752357464094) internal successors, (44098), 13786 states have internal predecessors, (44098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13787 states to 13787 states and 44098 transitions. [2021-05-03 13:57:25,452 INFO L78 Accepts]: Start accepts. Automaton has 13787 states and 44098 transitions. Word has length 24 [2021-05-03 13:57:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:25,452 INFO L480 AbstractCegarLoop]: Abstraction has 13787 states and 44098 transitions. [2021-05-03 13:57:25,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 13787 states and 44098 transitions. [2021-05-03 13:57:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:25,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:25,473 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:25,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-05-03 13:57:25,674 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:25,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1723222283, now seen corresponding path program 373 times [2021-05-03 13:57:25,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:25,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485587892] [2021-05-03 13:57:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:25,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485587892] [2021-05-03 13:57:25,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980144847] [2021-05-03 13:57:25,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:26,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:26,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:26,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858333848] [2021-05-03 13:57:26,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:26,183 INFO L87 Difference]: Start difference. First operand 13787 states and 44098 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:27,946 INFO L93 Difference]: Finished difference Result 17863 states and 56145 transitions. [2021-05-03 13:57:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 13:57:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:27,984 INFO L225 Difference]: With dead ends: 17863 [2021-05-03 13:57:27,984 INFO L226 Difference]: Without dead ends: 17848 [2021-05-03 13:57:27,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1530.5ms TimeCoverageRelationStatistics Valid=1502, Invalid=3190, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:57:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17848 states. [2021-05-03 13:57:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17848 to 15969. [2021-05-03 13:57:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15969 states, 15968 states have (on average 3.2116107214428857) internal successors, (51283), 15968 states have internal predecessors, (51283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15969 states to 15969 states and 51283 transitions. [2021-05-03 13:57:28,293 INFO L78 Accepts]: Start accepts. Automaton has 15969 states and 51283 transitions. Word has length 24 [2021-05-03 13:57:28,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:28,293 INFO L480 AbstractCegarLoop]: Abstraction has 15969 states and 51283 transitions. [2021-05-03 13:57:28,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:28,293 INFO L276 IsEmpty]: Start isEmpty. Operand 15969 states and 51283 transitions. [2021-05-03 13:57:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:28,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:28,315 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:28,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-05-03 13:57:28,516 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1258631179, now seen corresponding path program 374 times [2021-05-03 13:57:28,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:28,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49816232] [2021-05-03 13:57:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:28,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49816232] [2021-05-03 13:57:28,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680515992] [2021-05-03 13:57:28,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:28,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:57:28,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:28,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:29,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:29,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:29,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073713946] [2021-05-03 13:57:29,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:29,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:29,228 INFO L87 Difference]: Start difference. First operand 15969 states and 51283 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:32,255 INFO L93 Difference]: Finished difference Result 17633 states and 55417 transitions. [2021-05-03 13:57:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 13:57:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:32,292 INFO L225 Difference]: With dead ends: 17633 [2021-05-03 13:57:32,292 INFO L226 Difference]: Without dead ends: 17629 [2021-05-03 13:57:32,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 2478.3ms TimeCoverageRelationStatistics Valid=1386, Invalid=4314, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 13:57:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17629 states. [2021-05-03 13:57:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17629 to 15243. [2021-05-03 13:57:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 15242 states have (on average 3.1953811835717096) internal successors, (48704), 15242 states have internal predecessors, (48704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 48704 transitions. [2021-05-03 13:57:32,644 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 48704 transitions. Word has length 24 [2021-05-03 13:57:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:32,645 INFO L480 AbstractCegarLoop]: Abstraction has 15243 states and 48704 transitions. [2021-05-03 13:57:32,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 48704 transitions. [2021-05-03 13:57:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:32,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:32,669 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:32,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-05-03 13:57:32,869 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1225031951, now seen corresponding path program 375 times [2021-05-03 13:57:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:32,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978945429] [2021-05-03 13:57:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:33,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978945429] [2021-05-03 13:57:33,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297656206] [2021-05-03 13:57:33,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:33,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:57:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:33,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:33,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371864618] [2021-05-03 13:57:33,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:33,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:33,451 INFO L87 Difference]: Start difference. First operand 15243 states and 48704 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:35,184 INFO L93 Difference]: Finished difference Result 17307 states and 54169 transitions. [2021-05-03 13:57:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 13:57:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:35,213 INFO L225 Difference]: With dead ends: 17307 [2021-05-03 13:57:35,213 INFO L226 Difference]: Without dead ends: 17299 [2021-05-03 13:57:35,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1571.3ms TimeCoverageRelationStatistics Valid=1185, Invalid=3927, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:57:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2021-05-03 13:57:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 15525. [2021-05-03 13:57:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15525 states, 15524 states have (on average 3.1944730739500127) internal successors, (49591), 15524 states have internal predecessors, (49591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15525 states to 15525 states and 49591 transitions. [2021-05-03 13:57:35,480 INFO L78 Accepts]: Start accepts. Automaton has 15525 states and 49591 transitions. Word has length 24 [2021-05-03 13:57:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:35,481 INFO L480 AbstractCegarLoop]: Abstraction has 15525 states and 49591 transitions. [2021-05-03 13:57:35,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 15525 states and 49591 transitions. [2021-05-03 13:57:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:35,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:35,501 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:35,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable668,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:35,701 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash 183455883, now seen corresponding path program 376 times [2021-05-03 13:57:35,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:35,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659335467] [2021-05-03 13:57:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659335467] [2021-05-03 13:57:35,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222156221] [2021-05-03 13:57:35,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:35,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:36,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:36,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:36,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118129217] [2021-05-03 13:57:36,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:36,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:36,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:36,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:36,280 INFO L87 Difference]: Start difference. First operand 15525 states and 49591 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:38,731 INFO L93 Difference]: Finished difference Result 17843 states and 55959 transitions. [2021-05-03 13:57:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:57:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:38,771 INFO L225 Difference]: With dead ends: 17843 [2021-05-03 13:57:38,771 INFO L226 Difference]: Without dead ends: 17831 [2021-05-03 13:57:38,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2089.2ms TimeCoverageRelationStatistics Valid=1016, Invalid=3540, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:57:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17831 states. [2021-05-03 13:57:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17831 to 15785. [2021-05-03 13:57:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15785 states, 15784 states have (on average 3.192663456664977) internal successors, (50393), 15784 states have internal predecessors, (50393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15785 states to 15785 states and 50393 transitions. [2021-05-03 13:57:39,096 INFO L78 Accepts]: Start accepts. Automaton has 15785 states and 50393 transitions. Word has length 24 [2021-05-03 13:57:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:39,096 INFO L480 AbstractCegarLoop]: Abstraction has 15785 states and 50393 transitions. [2021-05-03 13:57:39,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 15785 states and 50393 transitions. [2021-05-03 13:57:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:39,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:39,121 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:39,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:39,323 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2040631153, now seen corresponding path program 377 times [2021-05-03 13:57:39,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:39,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603317312] [2021-05-03 13:57:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603317312] [2021-05-03 13:57:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118323993] [2021-05-03 13:57:39,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:39,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:57:39,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:40,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:40,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:40,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684568972] [2021-05-03 13:57:40,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:40,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:40,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:40,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:40,123 INFO L87 Difference]: Start difference. First operand 15785 states and 50393 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:42,262 INFO L93 Difference]: Finished difference Result 18546 states and 58331 transitions. [2021-05-03 13:57:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 13:57:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:42,291 INFO L225 Difference]: With dead ends: 18546 [2021-05-03 13:57:42,291 INFO L226 Difference]: Without dead ends: 18530 [2021-05-03 13:57:42,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1975.0ms TimeCoverageRelationStatistics Valid=880, Invalid=3152, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 13:57:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-05-03 13:57:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 15941. [2021-05-03 13:57:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15941 states, 15940 states have (on average 3.1888331242158094) internal successors, (50830), 15940 states have internal predecessors, (50830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15941 states to 15941 states and 50830 transitions. [2021-05-03 13:57:42,584 INFO L78 Accepts]: Start accepts. Automaton has 15941 states and 50830 transitions. Word has length 24 [2021-05-03 13:57:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:42,584 INFO L480 AbstractCegarLoop]: Abstraction has 15941 states and 50830 transitions. [2021-05-03 13:57:42,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 15941 states and 50830 transitions. [2021-05-03 13:57:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:42,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:42,605 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:42,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:42,805 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2027114763, now seen corresponding path program 378 times [2021-05-03 13:57:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:42,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274897242] [2021-05-03 13:57:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:43,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274897242] [2021-05-03 13:57:43,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572138318] [2021-05-03 13:57:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:43,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:57:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:43,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:43,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466679574] [2021-05-03 13:57:43,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:43,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:43,312 INFO L87 Difference]: Start difference. First operand 15941 states and 50830 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:44,478 INFO L93 Difference]: Finished difference Result 18841 states and 59191 transitions. [2021-05-03 13:57:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:57:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:44,509 INFO L225 Difference]: With dead ends: 18841 [2021-05-03 13:57:44,509 INFO L226 Difference]: Without dead ends: 18821 [2021-05-03 13:57:44,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1176.8ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 13:57:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2021-05-03 13:57:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 15970. [2021-05-03 13:57:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1873003945143714) internal successors, (50898), 15969 states have internal predecessors, (50898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50898 transitions. [2021-05-03 13:57:44,783 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50898 transitions. Word has length 24 [2021-05-03 13:57:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:44,783 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50898 transitions. [2021-05-03 13:57:44,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50898 transitions. [2021-05-03 13:57:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:44,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:44,802 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:45,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:45,002 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash -721780721, now seen corresponding path program 379 times [2021-05-03 13:57:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:45,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307395088] [2021-05-03 13:57:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:45,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307395088] [2021-05-03 13:57:45,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596300197] [2021-05-03 13:57:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:45,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:45,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:45,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:45,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-05-03 13:57:45,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774133069] [2021-05-03 13:57:45,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:45,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:45,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:45,665 INFO L87 Difference]: Start difference. First operand 15970 states and 50898 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:47,222 INFO L93 Difference]: Finished difference Result 17288 states and 54299 transitions. [2021-05-03 13:57:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:57:47,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:47,259 INFO L225 Difference]: With dead ends: 17288 [2021-05-03 13:57:47,259 INFO L226 Difference]: Without dead ends: 17276 [2021-05-03 13:57:47,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1516.0ms TimeCoverageRelationStatistics Valid=591, Invalid=1959, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:57:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2021-05-03 13:57:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15970. [2021-05-03 13:57:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.186924666541424) internal successors, (50892), 15969 states have internal predecessors, (50892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50892 transitions. [2021-05-03 13:57:47,615 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50892 transitions. Word has length 24 [2021-05-03 13:57:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:47,616 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50892 transitions. [2021-05-03 13:57:47,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50892 transitions. [2021-05-03 13:57:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:47,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:47,639 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:47,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-05-03 13:57:47,839 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -731252469, now seen corresponding path program 380 times [2021-05-03 13:57:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:47,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758860328] [2021-05-03 13:57:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:48,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758860328] [2021-05-03 13:57:48,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726864455] [2021-05-03 13:57:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:48,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:57:48,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:48,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:48,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-05-03 13:57:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63146623] [2021-05-03 13:57:48,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:57:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:57:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:57:48,492 INFO L87 Difference]: Start difference. First operand 15970 states and 50892 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:48,928 INFO L93 Difference]: Finished difference Result 17070 states and 53913 transitions. [2021-05-03 13:57:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:57:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:48,956 INFO L225 Difference]: With dead ends: 17070 [2021-05-03 13:57:48,956 INFO L226 Difference]: Without dead ends: 17056 [2021-05-03 13:57:48,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:57:48,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17056 states. [2021-05-03 13:57:49,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17056 to 15970. [2021-05-03 13:57:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15970 states, 15969 states have (on average 3.1868620452125995) internal successors, (50891), 15969 states have internal predecessors, (50891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15970 states to 15970 states and 50891 transitions. [2021-05-03 13:57:49,205 INFO L78 Accepts]: Start accepts. Automaton has 15970 states and 50891 transitions. Word has length 24 [2021-05-03 13:57:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:49,205 INFO L480 AbstractCegarLoop]: Abstraction has 15970 states and 50891 transitions. [2021-05-03 13:57:49,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15970 states and 50891 transitions. [2021-05-03 13:57:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:49,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:49,225 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:49,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-05-03 13:57:49,425 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1075398189, now seen corresponding path program 381 times [2021-05-03 13:57:49,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:49,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95111544] [2021-05-03 13:57:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95111544] [2021-05-03 13:57:49,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638616752] [2021-05-03 13:57:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:49,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:57:49,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:49,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:49,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-05-03 13:57:49,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941621315] [2021-05-03 13:57:49,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:57:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:49,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:57:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:57:49,876 INFO L87 Difference]: Start difference. First operand 15970 states and 50891 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:51,235 INFO L93 Difference]: Finished difference Result 17305 states and 54554 transitions. [2021-05-03 13:57:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 13:57:51,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:51,261 INFO L225 Difference]: With dead ends: 17305 [2021-05-03 13:57:51,262 INFO L226 Difference]: Without dead ends: 17305 [2021-05-03 13:57:51,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1133.5ms TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 13:57:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17305 states. [2021-05-03 13:57:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17305 to 16020. [2021-05-03 13:57:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16020 states, 16019 states have (on average 3.1862787939322055) internal successors, (51041), 16019 states have internal predecessors, (51041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:51,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16020 states to 16020 states and 51041 transitions. [2021-05-03 13:57:51,592 INFO L78 Accepts]: Start accepts. Automaton has 16020 states and 51041 transitions. Word has length 24 [2021-05-03 13:57:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:51,592 INFO L480 AbstractCegarLoop]: Abstraction has 16020 states and 51041 transitions. [2021-05-03 13:57:51,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 16020 states and 51041 transitions. [2021-05-03 13:57:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:51,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:51,619 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:51,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable674,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:51,825 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:51,825 INFO L82 PathProgramCache]: Analyzing trace with hash 310717139, now seen corresponding path program 382 times [2021-05-03 13:57:51,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:51,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171519950] [2021-05-03 13:57:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171519950] [2021-05-03 13:57:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847345306] [2021-05-03 13:57:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:52,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:52,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:52,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:52,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:57:52,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625345541] [2021-05-03 13:57:52,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:52,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:52,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:52,622 INFO L87 Difference]: Start difference. First operand 16020 states and 51041 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:54,609 INFO L93 Difference]: Finished difference Result 17722 states and 55602 transitions. [2021-05-03 13:57:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:57:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:54,645 INFO L225 Difference]: With dead ends: 17722 [2021-05-03 13:57:54,645 INFO L226 Difference]: Without dead ends: 17708 [2021-05-03 13:57:54,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1806.6ms TimeCoverageRelationStatistics Valid=944, Invalid=2026, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 13:57:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17708 states. [2021-05-03 13:57:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17708 to 16053. [2021-05-03 13:57:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16053 states, 16052 states have (on average 3.185771243458759) internal successors, (51138), 16052 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16053 states to 16053 states and 51138 transitions. [2021-05-03 13:57:54,966 INFO L78 Accepts]: Start accepts. Automaton has 16053 states and 51138 transitions. Word has length 24 [2021-05-03 13:57:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:54,966 INFO L480 AbstractCegarLoop]: Abstraction has 16053 states and 51138 transitions. [2021-05-03 13:57:54,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16053 states and 51138 transitions. [2021-05-03 13:57:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:54,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:54,992 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:55,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-05-03 13:57:55,193 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1445684781, now seen corresponding path program 383 times [2021-05-03 13:57:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:55,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543187847] [2021-05-03 13:57:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543187847] [2021-05-03 13:57:55,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93581297] [2021-05-03 13:57:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:55,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:57:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:55,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:55,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:57:55,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49582774] [2021-05-03 13:57:55,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:55,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:55,757 INFO L87 Difference]: Start difference. First operand 16053 states and 51138 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:56,905 INFO L93 Difference]: Finished difference Result 17524 states and 54984 transitions. [2021-05-03 13:57:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 13:57:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:57:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:56,933 INFO L225 Difference]: With dead ends: 17524 [2021-05-03 13:57:56,933 INFO L226 Difference]: Without dead ends: 17506 [2021-05-03 13:57:56,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1067.3ms TimeCoverageRelationStatistics Valid=862, Invalid=1894, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 13:57:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17506 states. [2021-05-03 13:57:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17506 to 16094. [2021-05-03 13:57:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16093 states have (on average 3.1848008450879264) internal successors, (51253), 16093 states have internal predecessors, (51253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 51253 transitions. [2021-05-03 13:57:57,186 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 51253 transitions. Word has length 24 [2021-05-03 13:57:57,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:57,186 INFO L480 AbstractCegarLoop]: Abstraction has 16094 states and 51253 transitions. [2021-05-03 13:57:57,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 51253 transitions. [2021-05-03 13:57:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:57:57,206 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:57,206 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:57,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:57,407 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1130056403, now seen corresponding path program 384 times [2021-05-03 13:57:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:57,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053683756] [2021-05-03 13:57:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053683756] [2021-05-03 13:57:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403201632] [2021-05-03 13:57:57,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:57,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:57:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:57:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:57,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:57,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:57:57,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87543109] [2021-05-03 13:57:57,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:57:57,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:57:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:57:57,950 INFO L87 Difference]: Start difference. First operand 16094 states and 51253 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:00,341 INFO L93 Difference]: Finished difference Result 17741 states and 55478 transitions. [2021-05-03 13:58:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 13:58:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:00,378 INFO L225 Difference]: With dead ends: 17741 [2021-05-03 13:58:00,379 INFO L226 Difference]: Without dead ends: 17731 [2021-05-03 13:58:00,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1911.9ms TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 13:58:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17731 states. [2021-05-03 13:58:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17731 to 16203. [2021-05-03 13:58:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.1827552154055057) internal successors, (51567), 16202 states have internal predecessors, (51567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 51567 transitions. [2021-05-03 13:58:00,671 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 51567 transitions. Word has length 24 [2021-05-03 13:58:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:00,671 INFO L480 AbstractCegarLoop]: Abstraction has 16203 states and 51567 transitions. [2021-05-03 13:58:00,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 51567 transitions. [2021-05-03 13:58:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:00,695 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:00,695 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:00,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-05-03 13:58:00,895 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:00,896 INFO L82 PathProgramCache]: Analyzing trace with hash -172328493, now seen corresponding path program 385 times [2021-05-03 13:58:00,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:00,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950459136] [2021-05-03 13:58:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950459136] [2021-05-03 13:58:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125004714] [2021-05-03 13:58:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:01,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:01,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:58:01,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767756000] [2021-05-03 13:58:01,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:01,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:01,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:01,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:01,637 INFO L87 Difference]: Start difference. First operand 16203 states and 51567 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:04,849 INFO L93 Difference]: Finished difference Result 18351 states and 57209 transitions. [2021-05-03 13:58:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 13:58:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:04,884 INFO L225 Difference]: With dead ends: 18351 [2021-05-03 13:58:04,884 INFO L226 Difference]: Without dead ends: 18347 [2021-05-03 13:58:04,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 2708.0ms TimeCoverageRelationStatistics Valid=1920, Invalid=3780, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 13:58:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18347 states. [2021-05-03 13:58:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18347 to 16270. [2021-05-03 13:58:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16270 states, 16269 states have (on average 3.1803429835884196) internal successors, (51741), 16269 states have internal predecessors, (51741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16270 states to 16270 states and 51741 transitions. [2021-05-03 13:58:05,235 INFO L78 Accepts]: Start accepts. Automaton has 16270 states and 51741 transitions. Word has length 24 [2021-05-03 13:58:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:05,235 INFO L480 AbstractCegarLoop]: Abstraction has 16270 states and 51741 transitions. [2021-05-03 13:58:05,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 16270 states and 51741 transitions. [2021-05-03 13:58:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:05,260 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:05,260 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:05,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:05,460 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash -214340909, now seen corresponding path program 386 times [2021-05-03 13:58:05,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:05,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521754060] [2021-05-03 13:58:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:05,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521754060] [2021-05-03 13:58:05,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7433871] [2021-05-03 13:58:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:05,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:58:05,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:05,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:05,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:05,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:58:05,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94016097] [2021-05-03 13:58:05,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:05,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:05,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:05,888 INFO L87 Difference]: Start difference. First operand 16270 states and 51741 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:07,921 INFO L93 Difference]: Finished difference Result 18812 states and 58615 transitions. [2021-05-03 13:58:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 13:58:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:07,952 INFO L225 Difference]: With dead ends: 18812 [2021-05-03 13:58:07,952 INFO L226 Difference]: Without dead ends: 18812 [2021-05-03 13:58:07,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1672.6ms TimeCoverageRelationStatistics Valid=2017, Invalid=3683, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 13:58:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-05-03 13:58:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 16419. [2021-05-03 13:58:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16419 states, 16418 states have (on average 3.188451699354367) internal successors, (52348), 16418 states have internal predecessors, (52348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16419 states to 16419 states and 52348 transitions. [2021-05-03 13:58:08,228 INFO L78 Accepts]: Start accepts. Automaton has 16419 states and 52348 transitions. Word has length 24 [2021-05-03 13:58:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:08,228 INFO L480 AbstractCegarLoop]: Abstraction has 16419 states and 52348 transitions. [2021-05-03 13:58:08,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 16419 states and 52348 transitions. [2021-05-03 13:58:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:08,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:08,253 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:08,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-05-03 13:58:08,453 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:08,453 INFO L82 PathProgramCache]: Analyzing trace with hash 357113897, now seen corresponding path program 387 times [2021-05-03 13:58:08,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:08,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098847398] [2021-05-03 13:58:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098847398] [2021-05-03 13:58:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133428477] [2021-05-03 13:58:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:08,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:58:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:08,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:09,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:09,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-05-03 13:58:09,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085032] [2021-05-03 13:58:09,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:09,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:09,268 INFO L87 Difference]: Start difference. First operand 16419 states and 52348 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:12,729 INFO L93 Difference]: Finished difference Result 17894 states and 55882 transitions. [2021-05-03 13:58:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 13:58:12,730 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:12,822 INFO L225 Difference]: With dead ends: 17894 [2021-05-03 13:58:12,822 INFO L226 Difference]: Without dead ends: 17879 [2021-05-03 13:58:12,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 3169.7ms TimeCoverageRelationStatistics Valid=2525, Invalid=5131, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 13:58:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17879 states. [2021-05-03 13:58:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17879 to 15868. [2021-05-03 13:58:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15868 states, 15867 states have (on average 3.1803743618831537) internal successors, (50463), 15867 states have internal predecessors, (50463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15868 states to 15868 states and 50463 transitions. [2021-05-03 13:58:13,061 INFO L78 Accepts]: Start accepts. Automaton has 15868 states and 50463 transitions. Word has length 24 [2021-05-03 13:58:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:13,061 INFO L480 AbstractCegarLoop]: Abstraction has 15868 states and 50463 transitions. [2021-05-03 13:58:13,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15868 states and 50463 transitions. [2021-05-03 13:58:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:13,080 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:13,080 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:13,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:13,281 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash 892343699, now seen corresponding path program 388 times [2021-05-03 13:58:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:13,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517200358] [2021-05-03 13:58:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:13,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517200358] [2021-05-03 13:58:13,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347150795] [2021-05-03 13:58:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:13,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:58:13,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:13,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:13,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:13,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-05-03 13:58:13,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100809750] [2021-05-03 13:58:13,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:58:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:58:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:58:13,787 INFO L87 Difference]: Start difference. First operand 15868 states and 50463 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:15,875 INFO L93 Difference]: Finished difference Result 17262 states and 53968 transitions. [2021-05-03 13:58:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:58:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:15,909 INFO L225 Difference]: With dead ends: 17262 [2021-05-03 13:58:15,910 INFO L226 Difference]: Without dead ends: 17250 [2021-05-03 13:58:15,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 1845.2ms TimeCoverageRelationStatistics Valid=2548, Invalid=5284, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 13:58:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-05-03 13:58:16,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 15928. [2021-05-03 13:58:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.1800087901048535) internal successors, (50648), 15927 states have internal predecessors, (50648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50648 transitions. [2021-05-03 13:58:16,207 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50648 transitions. Word has length 24 [2021-05-03 13:58:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:16,207 INFO L480 AbstractCegarLoop]: Abstraction has 15928 states and 50648 transitions. [2021-05-03 13:58:16,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:16,207 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50648 transitions. [2021-05-03 13:58:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:16,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:16,231 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:16,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:16,432 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash 626440455, now seen corresponding path program 389 times [2021-05-03 13:58:16,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:16,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136943407] [2021-05-03 13:58:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:16,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136943407] [2021-05-03 13:58:16,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542726708] [2021-05-03 13:58:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:16,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:58:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:17,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:17,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-05-03 13:58:17,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606704832] [2021-05-03 13:58:17,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:58:17,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:58:17,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:58:17,313 INFO L87 Difference]: Start difference. First operand 15928 states and 50648 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:20,136 INFO L93 Difference]: Finished difference Result 17178 states and 53993 transitions. [2021-05-03 13:58:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:58:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:20,165 INFO L225 Difference]: With dead ends: 17178 [2021-05-03 13:58:20,165 INFO L226 Difference]: Without dead ends: 17178 [2021-05-03 13:58:20,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 2367.9ms TimeCoverageRelationStatistics Valid=1411, Invalid=3145, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:58:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-05-03 13:58:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 15887. [2021-05-03 13:58:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15887 states, 15886 states have (on average 3.1804733727810652) internal successors, (50525), 15886 states have internal predecessors, (50525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15887 states to 15887 states and 50525 transitions. [2021-05-03 13:58:20,451 INFO L78 Accepts]: Start accepts. Automaton has 15887 states and 50525 transitions. Word has length 24 [2021-05-03 13:58:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:20,451 INFO L480 AbstractCegarLoop]: Abstraction has 15887 states and 50525 transitions. [2021-05-03 13:58:20,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 15887 states and 50525 transitions. [2021-05-03 13:58:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:20,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:20,476 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:20,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:20,676 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1494965135, now seen corresponding path program 390 times [2021-05-03 13:58:20,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:20,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261553138] [2021-05-03 13:58:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:20,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261553138] [2021-05-03 13:58:20,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276294840] [2021-05-03 13:58:20,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:20,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:58:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:20,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:21,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:21,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-05-03 13:58:21,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691453783] [2021-05-03 13:58:21,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:58:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:58:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:58:21,181 INFO L87 Difference]: Start difference. First operand 15887 states and 50525 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:22,717 INFO L93 Difference]: Finished difference Result 17298 states and 54207 transitions. [2021-05-03 13:58:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:58:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:22,745 INFO L225 Difference]: With dead ends: 17298 [2021-05-03 13:58:22,746 INFO L226 Difference]: Without dead ends: 17284 [2021-05-03 13:58:22,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1305.4ms TimeCoverageRelationStatistics Valid=1112, Invalid=2548, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 13:58:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17284 states. [2021-05-03 13:58:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17284 to 15888. [2021-05-03 13:58:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 15887 states have (on average 3.180147290237301) internal successors, (50523), 15887 states have internal predecessors, (50523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 50523 transitions. [2021-05-03 13:58:23,023 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 50523 transitions. Word has length 24 [2021-05-03 13:58:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:23,023 INFO L480 AbstractCegarLoop]: Abstraction has 15888 states and 50523 transitions. [2021-05-03 13:58:23,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 50523 transitions. [2021-05-03 13:58:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:23,046 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:23,046 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:23,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-05-03 13:58:23,249 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 276056071, now seen corresponding path program 391 times [2021-05-03 13:58:23,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:23,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754521982] [2021-05-03 13:58:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754521982] [2021-05-03 13:58:23,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058750486] [2021-05-03 13:58:23,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:23,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:23,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:58:23,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874114425] [2021-05-03 13:58:23,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:23,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:23,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:23,781 INFO L87 Difference]: Start difference. First operand 15888 states and 50523 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:26,378 INFO L93 Difference]: Finished difference Result 17783 states and 55482 transitions. [2021-05-03 13:58:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:58:26,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:26,417 INFO L225 Difference]: With dead ends: 17783 [2021-05-03 13:58:26,417 INFO L226 Difference]: Without dead ends: 17773 [2021-05-03 13:58:26,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1911.6ms TimeCoverageRelationStatistics Valid=1178, Invalid=2604, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 13:58:26,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17773 states. [2021-05-03 13:58:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17773 to 16003. [2021-05-03 13:58:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16003 states, 16002 states have (on average 3.1781652293463316) internal successors, (50857), 16002 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16003 states to 16003 states and 50857 transitions. [2021-05-03 13:58:26,699 INFO L78 Accepts]: Start accepts. Automaton has 16003 states and 50857 transitions. Word has length 24 [2021-05-03 13:58:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:26,700 INFO L480 AbstractCegarLoop]: Abstraction has 16003 states and 50857 transitions. [2021-05-03 13:58:26,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 16003 states and 50857 transitions. [2021-05-03 13:58:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:26,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:26,725 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:26,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:26,925 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:26,926 INFO L82 PathProgramCache]: Analyzing trace with hash -594547569, now seen corresponding path program 392 times [2021-05-03 13:58:26,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:26,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468910321] [2021-05-03 13:58:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:27,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468910321] [2021-05-03 13:58:27,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833015969] [2021-05-03 13:58:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:27,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:58:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:27,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:27,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:58:27,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17601585] [2021-05-03 13:58:27,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:27,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:27,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:27,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:27,771 INFO L87 Difference]: Start difference. First operand 16003 states and 50857 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:29,885 INFO L93 Difference]: Finished difference Result 17914 states and 55910 transitions. [2021-05-03 13:58:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 13:58:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:29,912 INFO L225 Difference]: With dead ends: 17914 [2021-05-03 13:58:29,912 INFO L226 Difference]: Without dead ends: 17904 [2021-05-03 13:58:29,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1878.4ms TimeCoverageRelationStatistics Valid=1233, Invalid=2549, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 13:58:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2021-05-03 13:58:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 16144. [2021-05-03 13:58:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16144 states, 16143 states have (on average 3.1767329492659355) internal successors, (51282), 16143 states have internal predecessors, (51282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16144 states to 16144 states and 51282 transitions. [2021-05-03 13:58:30,171 INFO L78 Accepts]: Start accepts. Automaton has 16144 states and 51282 transitions. Word has length 24 [2021-05-03 13:58:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:30,171 INFO L480 AbstractCegarLoop]: Abstraction has 16144 states and 51282 transitions. [2021-05-03 13:58:30,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 16144 states and 51282 transitions. [2021-05-03 13:58:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:30,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:30,193 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:30,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-05-03 13:58:30,393 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash -206989561, now seen corresponding path program 393 times [2021-05-03 13:58:30,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:30,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115571313] [2021-05-03 13:58:30,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115571313] [2021-05-03 13:58:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756467002] [2021-05-03 13:58:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:30,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:58:30,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:30,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:30,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:58:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795594317] [2021-05-03 13:58:30,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:30,859 INFO L87 Difference]: Start difference. First operand 16144 states and 51282 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:33,473 INFO L93 Difference]: Finished difference Result 18800 states and 58404 transitions. [2021-05-03 13:58:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-03 13:58:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:33,510 INFO L225 Difference]: With dead ends: 18800 [2021-05-03 13:58:33,511 INFO L226 Difference]: Without dead ends: 18796 [2021-05-03 13:58:33,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1997.8ms TimeCoverageRelationStatistics Valid=1723, Invalid=3389, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:58:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18796 states. [2021-05-03 13:58:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18796 to 16306. [2021-05-03 13:58:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16306 states, 16305 states have (on average 3.176448942042318) internal successors, (51792), 16305 states have internal predecessors, (51792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16306 states to 16306 states and 51792 transitions. [2021-05-03 13:58:33,818 INFO L78 Accepts]: Start accepts. Automaton has 16306 states and 51792 transitions. Word has length 24 [2021-05-03 13:58:33,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:33,818 INFO L480 AbstractCegarLoop]: Abstraction has 16306 states and 51792 transitions. [2021-05-03 13:58:33,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 16306 states and 51792 transitions. [2021-05-03 13:58:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:33,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:33,842 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:34,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-05-03 13:58:34,043 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash 636796303, now seen corresponding path program 394 times [2021-05-03 13:58:34,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:34,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799588690] [2021-05-03 13:58:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799588690] [2021-05-03 13:58:34,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676506368] [2021-05-03 13:58:34,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:34,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:58:34,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:34,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:34,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:58:34,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328380823] [2021-05-03 13:58:34,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:34,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:34,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:34,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:34,907 INFO L87 Difference]: Start difference. First operand 16306 states and 51792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:37,619 INFO L93 Difference]: Finished difference Result 19224 states and 59687 transitions. [2021-05-03 13:58:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 13:58:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:37,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:37,650 INFO L225 Difference]: With dead ends: 19224 [2021-05-03 13:58:37,650 INFO L226 Difference]: Without dead ends: 19224 [2021-05-03 13:58:37,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2313.3ms TimeCoverageRelationStatistics Valid=1915, Invalid=3487, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 13:58:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19224 states. [2021-05-03 13:58:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19224 to 16395. [2021-05-03 13:58:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16395 states, 16394 states have (on average 3.1835427595461754) internal successors, (52191), 16394 states have internal predecessors, (52191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:37,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16395 states to 16395 states and 52191 transitions. [2021-05-03 13:58:37,936 INFO L78 Accepts]: Start accepts. Automaton has 16395 states and 52191 transitions. Word has length 24 [2021-05-03 13:58:37,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:37,936 INFO L480 AbstractCegarLoop]: Abstraction has 16395 states and 52191 transitions. [2021-05-03 13:58:37,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16395 states and 52191 transitions. [2021-05-03 13:58:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:37,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:37,961 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:38,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:38,161 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1208251109, now seen corresponding path program 395 times [2021-05-03 13:58:38,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:38,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096909305] [2021-05-03 13:58:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:38,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096909305] [2021-05-03 13:58:38,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456681472] [2021-05-03 13:58:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:38,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:58:38,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:38,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:38,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-05-03 13:58:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12469718] [2021-05-03 13:58:38,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:58:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:58:38,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:58:38,627 INFO L87 Difference]: Start difference. First operand 16395 states and 52191 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:42,132 INFO L93 Difference]: Finished difference Result 18347 states and 57068 transitions. [2021-05-03 13:58:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 13:58:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:42,174 INFO L225 Difference]: With dead ends: 18347 [2021-05-03 13:58:42,174 INFO L226 Difference]: Without dead ends: 18335 [2021-05-03 13:58:42,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 2973.5ms TimeCoverageRelationStatistics Valid=2592, Invalid=5598, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 13:58:42,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18335 states. [2021-05-03 13:58:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18335 to 16091. [2021-05-03 13:58:42,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.1781852082038533) internal successors, (51137), 16090 states have internal predecessors, (51137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 51137 transitions. [2021-05-03 13:58:42,506 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 51137 transitions. Word has length 24 [2021-05-03 13:58:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:42,506 INFO L480 AbstractCegarLoop]: Abstraction has 16091 states and 51137 transitions. [2021-05-03 13:58:42,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 51137 transitions. [2021-05-03 13:58:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:42,533 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:42,533 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:42,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-05-03 13:58:42,736 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1743480911, now seen corresponding path program 396 times [2021-05-03 13:58:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:42,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691307300] [2021-05-03 13:58:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:42,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691307300] [2021-05-03 13:58:42,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078604005] [2021-05-03 13:58:42,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:43,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:58:43,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:43,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:43,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-05-03 13:58:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126322172] [2021-05-03 13:58:43,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:58:43,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:58:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:58:43,690 INFO L87 Difference]: Start difference. First operand 16091 states and 51137 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:46,729 INFO L93 Difference]: Finished difference Result 18125 states and 56330 transitions. [2021-05-03 13:58:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 13:58:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:46,762 INFO L225 Difference]: With dead ends: 18125 [2021-05-03 13:58:46,762 INFO L226 Difference]: Without dead ends: 18101 [2021-05-03 13:58:46,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 2821.3ms TimeCoverageRelationStatistics Valid=2475, Invalid=5535, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:58:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18101 states. [2021-05-03 13:58:46,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18101 to 15884. [2021-05-03 13:58:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15884 states, 15883 states have (on average 3.1798148964301456) internal successors, (50505), 15883 states have internal predecessors, (50505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15884 states to 15884 states and 50505 transitions. [2021-05-03 13:58:47,047 INFO L78 Accepts]: Start accepts. Automaton has 15884 states and 50505 transitions. Word has length 24 [2021-05-03 13:58:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:47,047 INFO L480 AbstractCegarLoop]: Abstraction has 15884 states and 50505 transitions. [2021-05-03 13:58:47,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 15884 states and 50505 transitions. [2021-05-03 13:58:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:47,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:47,068 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:47,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-05-03 13:58:47,269 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1155735589, now seen corresponding path program 397 times [2021-05-03 13:58:47,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:47,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84697192] [2021-05-03 13:58:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:47,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84697192] [2021-05-03 13:58:47,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241933690] [2021-05-03 13:58:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:47,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:47,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-05-03 13:58:47,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212424997] [2021-05-03 13:58:47,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:58:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:47,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:58:47,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:58:47,854 INFO L87 Difference]: Start difference. First operand 15884 states and 50505 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:51,601 INFO L93 Difference]: Finished difference Result 17742 states and 55315 transitions. [2021-05-03 13:58:51,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 13:58:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:51,634 INFO L225 Difference]: With dead ends: 17742 [2021-05-03 13:58:51,634 INFO L226 Difference]: Without dead ends: 17724 [2021-05-03 13:58:51,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 3085.4ms TimeCoverageRelationStatistics Valid=2455, Invalid=5555, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:58:51,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-05-03 13:58:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 15928. [2021-05-03 13:58:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15928 states, 15927 states have (on average 3.180322722421046) internal successors, (50653), 15927 states have internal predecessors, (50653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15928 states to 15928 states and 50653 transitions. [2021-05-03 13:58:51,937 INFO L78 Accepts]: Start accepts. Automaton has 15928 states and 50653 transitions. Word has length 24 [2021-05-03 13:58:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:51,937 INFO L480 AbstractCegarLoop]: Abstraction has 15928 states and 50653 transitions. [2021-05-03 13:58:51,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15928 states and 50653 transitions. [2021-05-03 13:58:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:51,963 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:51,963 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:52,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:52,163 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:52,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:52,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1843830867, now seen corresponding path program 398 times [2021-05-03 13:58:52,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:52,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350368132] [2021-05-03 13:58:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:52,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350368132] [2021-05-03 13:58:52,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570280134] [2021-05-03 13:58:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:58:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:52,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:53,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:53,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 13:58:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969970225] [2021-05-03 13:58:53,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:58:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:58:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:58:53,181 INFO L87 Difference]: Start difference. First operand 15928 states and 50653 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:55,474 INFO L93 Difference]: Finished difference Result 16795 states and 52835 transitions. [2021-05-03 13:58:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 13:58:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:55,500 INFO L225 Difference]: With dead ends: 16795 [2021-05-03 13:58:55,500 INFO L226 Difference]: Without dead ends: 16795 [2021-05-03 13:58:55,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 2157.0ms TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2021-05-03 13:58:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-05-03 13:58:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 15853. [2021-05-03 13:58:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15853 states, 15852 states have (on average 3.181049709815796) internal successors, (50426), 15852 states have internal predecessors, (50426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15853 states to 15853 states and 50426 transitions. [2021-05-03 13:58:55,845 INFO L78 Accepts]: Start accepts. Automaton has 15853 states and 50426 transitions. Word has length 24 [2021-05-03 13:58:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:55,845 INFO L480 AbstractCegarLoop]: Abstraction has 15853 states and 50426 transitions. [2021-05-03 13:58:55,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 15853 states and 50426 transitions. [2021-05-03 13:58:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:55,867 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:55,867 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:56,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:56,068 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash -448052653, now seen corresponding path program 399 times [2021-05-03 13:58:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:56,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396253532] [2021-05-03 13:58:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:56,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396253532] [2021-05-03 13:58:56,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118013047] [2021-05-03 13:58:56,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:56,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:58:56,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:56,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:56,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:56,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:56,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-03 13:58:56,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307496754] [2021-05-03 13:58:56,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:58:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:58:56,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:58:56,603 INFO L87 Difference]: Start difference. First operand 15853 states and 50426 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:59,272 INFO L93 Difference]: Finished difference Result 16783 states and 52633 transitions. [2021-05-03 13:58:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:58:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:58:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:59,309 INFO L225 Difference]: With dead ends: 16783 [2021-05-03 13:58:59,310 INFO L226 Difference]: Without dead ends: 16769 [2021-05-03 13:58:59,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 2174.0ms TimeCoverageRelationStatistics Valid=1254, Invalid=3036, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 13:58:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16769 states. [2021-05-03 13:58:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16769 to 15761. [2021-05-03 13:58:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15761 states, 15760 states have (on average 3.1805837563451775) internal successors, (50126), 15760 states have internal predecessors, (50126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15761 states to 15761 states and 50126 transitions. [2021-05-03 13:58:59,592 INFO L78 Accepts]: Start accepts. Automaton has 15761 states and 50126 transitions. Word has length 24 [2021-05-03 13:58:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:59,592 INFO L480 AbstractCegarLoop]: Abstraction has 15761 states and 50126 transitions. [2021-05-03 13:58:59,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 15761 states and 50126 transitions. [2021-05-03 13:58:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:58:59,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:59,616 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:59,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:59,816 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:59,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2110414931, now seen corresponding path program 400 times [2021-05-03 13:58:59,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:59,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378454305] [2021-05-03 13:58:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378454305] [2021-05-03 13:58:59,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822609522] [2021-05-03 13:58:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:59,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:58:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:59,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:58:59,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:00,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:00,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-05-03 13:59:00,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450946844] [2021-05-03 13:59:00,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:59:00,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:00,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:59:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:59:00,567 INFO L87 Difference]: Start difference. First operand 15761 states and 50126 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:03,033 INFO L93 Difference]: Finished difference Result 17488 states and 54534 transitions. [2021-05-03 13:59:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:59:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:03,061 INFO L225 Difference]: With dead ends: 17488 [2021-05-03 13:59:03,061 INFO L226 Difference]: Without dead ends: 17478 [2021-05-03 13:59:03,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 2114.7ms TimeCoverageRelationStatistics Valid=1312, Invalid=2978, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 13:59:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-05-03 13:59:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 15724. [2021-05-03 13:59:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15724 states, 15723 states have (on average 3.179800292565032) internal successors, (49996), 15723 states have internal predecessors, (49996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15724 states to 15724 states and 49996 transitions. [2021-05-03 13:59:03,415 INFO L78 Accepts]: Start accepts. Automaton has 15724 states and 49996 transitions. Word has length 24 [2021-05-03 13:59:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:03,415 INFO L480 AbstractCegarLoop]: Abstraction has 15724 states and 49996 transitions. [2021-05-03 13:59:03,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15724 states and 49996 transitions. [2021-05-03 13:59:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:03,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:03,441 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:03,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:03,642 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1777304147, now seen corresponding path program 401 times [2021-05-03 13:59:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:03,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697609598] [2021-05-03 13:59:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697609598] [2021-05-03 13:59:03,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43965682] [2021-05-03 13:59:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:03,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:59:03,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:03,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:04,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:04,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:59:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501065319] [2021-05-03 13:59:04,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:04,181 INFO L87 Difference]: Start difference. First operand 15724 states and 49996 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:06,345 INFO L93 Difference]: Finished difference Result 19027 states and 59058 transitions. [2021-05-03 13:59:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 13:59:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:06,392 INFO L225 Difference]: With dead ends: 19027 [2021-05-03 13:59:06,392 INFO L226 Difference]: Without dead ends: 19021 [2021-05-03 13:59:06,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1824.2ms TimeCoverageRelationStatistics Valid=1353, Invalid=2807, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 13:59:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-05-03 13:59:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 16139. [2021-05-03 13:59:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.178584706902962) internal successors, (51296), 16138 states have internal predecessors, (51296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 51296 transitions. [2021-05-03 13:59:06,737 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 51296 transitions. Word has length 24 [2021-05-03 13:59:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:06,737 INFO L480 AbstractCegarLoop]: Abstraction has 16139 states and 51296 transitions. [2021-05-03 13:59:06,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 51296 transitions. [2021-05-03 13:59:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:06,768 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:06,768 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:06,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-05-03 13:59:06,969 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1281482669, now seen corresponding path program 402 times [2021-05-03 13:59:06,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:06,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926767972] [2021-05-03 13:59:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:07,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926767972] [2021-05-03 13:59:07,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891398116] [2021-05-03 13:59:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:07,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:59:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:07,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:07,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:59:07,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126648612] [2021-05-03 13:59:07,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:07,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:07,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:07,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:07,926 INFO L87 Difference]: Start difference. First operand 16139 states and 51296 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:10,884 INFO L93 Difference]: Finished difference Result 18678 states and 58104 transitions. [2021-05-03 13:59:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 13:59:10,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:10,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:10,916 INFO L225 Difference]: With dead ends: 18678 [2021-05-03 13:59:10,916 INFO L226 Difference]: Without dead ends: 18674 [2021-05-03 13:59:10,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2720.6ms TimeCoverageRelationStatistics Valid=1546, Invalid=3010, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:59:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18674 states. [2021-05-03 13:59:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18674 to 16227. [2021-05-03 13:59:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16227 states, 16226 states have (on average 3.1787255022802907) internal successors, (51578), 16226 states have internal predecessors, (51578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16227 states to 16227 states and 51578 transitions. [2021-05-03 13:59:11,248 INFO L78 Accepts]: Start accepts. Automaton has 16227 states and 51578 transitions. Word has length 24 [2021-05-03 13:59:11,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:11,249 INFO L480 AbstractCegarLoop]: Abstraction has 16227 states and 51578 transitions. [2021-05-03 13:59:11,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:11,249 INFO L276 IsEmpty]: Start isEmpty. Operand 16227 states and 51578 transitions. [2021-05-03 13:59:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:11,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:11,270 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:11,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-05-03 13:59:11,470 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1252246099, now seen corresponding path program 403 times [2021-05-03 13:59:11,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:11,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625841832] [2021-05-03 13:59:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625841832] [2021-05-03 13:59:11,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309869559] [2021-05-03 13:59:11,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:11,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:11,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:59:11,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826654784] [2021-05-03 13:59:11,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:11,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:11,995 INFO L87 Difference]: Start difference. First operand 16227 states and 51578 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:14,526 INFO L93 Difference]: Finished difference Result 19416 states and 60144 transitions. [2021-05-03 13:59:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-03 13:59:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:14,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:14,571 INFO L225 Difference]: With dead ends: 19416 [2021-05-03 13:59:14,571 INFO L226 Difference]: Without dead ends: 19416 [2021-05-03 13:59:14,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1897.8ms TimeCoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 13:59:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19416 states. [2021-05-03 13:59:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19416 to 16138. [2021-05-03 13:59:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16138 states, 16137 states have (on average 3.1851645287228108) internal successors, (51399), 16137 states have internal predecessors, (51399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16138 states to 16138 states and 51399 transitions. [2021-05-03 13:59:14,904 INFO L78 Accepts]: Start accepts. Automaton has 16138 states and 51399 transitions. Word has length 24 [2021-05-03 13:59:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:14,904 INFO L480 AbstractCegarLoop]: Abstraction has 16138 states and 51399 transitions. [2021-05-03 13:59:14,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 16138 states and 51399 transitions. [2021-05-03 13:59:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:14,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:14,931 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:15,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-05-03 13:59:15,131 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:15,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:15,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1823700905, now seen corresponding path program 404 times [2021-05-03 13:59:15,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:15,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716827263] [2021-05-03 13:59:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:15,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716827263] [2021-05-03 13:59:15,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398274738] [2021-05-03 13:59:15,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:15,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:59:15,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:16,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:16,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 22 [2021-05-03 13:59:16,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534772219] [2021-05-03 13:59:16,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:16,083 INFO L87 Difference]: Start difference. First operand 16138 states and 51399 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:20,825 INFO L93 Difference]: Finished difference Result 18584 states and 57665 transitions. [2021-05-03 13:59:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-03 13:59:20,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:20,859 INFO L225 Difference]: With dead ends: 18584 [2021-05-03 13:59:20,859 INFO L226 Difference]: Without dead ends: 18575 [2021-05-03 13:59:20,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 4336.3ms TimeCoverageRelationStatistics Valid=2787, Invalid=6333, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 13:59:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2021-05-03 13:59:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 16009. [2021-05-03 13:59:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 3.182408795602199) internal successors, (50944), 16008 states have internal predecessors, (50944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 50944 transitions. [2021-05-03 13:59:21,144 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 50944 transitions. Word has length 24 [2021-05-03 13:59:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:21,144 INFO L480 AbstractCegarLoop]: Abstraction has 16009 states and 50944 transitions. [2021-05-03 13:59:21,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:21,144 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 50944 transitions. [2021-05-03 13:59:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:21,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:21,171 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:21,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-05-03 13:59:21,371 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1936036589, now seen corresponding path program 405 times [2021-05-03 13:59:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:21,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388096826] [2021-05-03 13:59:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:21,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388096826] [2021-05-03 13:59:21,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240840521] [2021-05-03 13:59:21,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:21,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:59:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:21,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:21,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:21,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-05-03 13:59:21,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267878946] [2021-05-03 13:59:21,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:59:21,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:21,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:59:21,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:59:21,941 INFO L87 Difference]: Start difference. First operand 16009 states and 50944 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:24,742 INFO L93 Difference]: Finished difference Result 18529 states and 57461 transitions. [2021-05-03 13:59:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 13:59:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:24,771 INFO L225 Difference]: With dead ends: 18529 [2021-05-03 13:59:24,771 INFO L226 Difference]: Without dead ends: 18514 [2021-05-03 13:59:24,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 2439.2ms TimeCoverageRelationStatistics Valid=2529, Invalid=6027, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 13:59:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18514 states. [2021-05-03 13:59:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18514 to 15897. [2021-05-03 13:59:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 3.1817438349270257) internal successors, (50577), 15896 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 50577 transitions. [2021-05-03 13:59:25,085 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 50577 transitions. Word has length 24 [2021-05-03 13:59:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:25,085 INFO L480 AbstractCegarLoop]: Abstraction has 15897 states and 50577 transitions. [2021-05-03 13:59:25,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 50577 transitions. [2021-05-03 13:59:25,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:25,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:25,112 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:25,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-05-03 13:59:25,312 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1771185385, now seen corresponding path program 406 times [2021-05-03 13:59:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:25,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278401787] [2021-05-03 13:59:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278401787] [2021-05-03 13:59:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725833897] [2021-05-03 13:59:25,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:25,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:59:25,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:25,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:26,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:26,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-05-03 13:59:26,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633575755] [2021-05-03 13:59:26,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:59:26,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:26,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:59:26,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:59:26,385 INFO L87 Difference]: Start difference. First operand 15897 states and 50577 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:30,690 INFO L93 Difference]: Finished difference Result 18517 states and 57409 transitions. [2021-05-03 13:59:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 13:59:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:30,718 INFO L225 Difference]: With dead ends: 18517 [2021-05-03 13:59:30,718 INFO L226 Difference]: Without dead ends: 18490 [2021-05-03 13:59:30,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 4043.3ms TimeCoverageRelationStatistics Valid=2373, Invalid=5817, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 13:59:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-05-03 13:59:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 15779. [2021-05-03 13:59:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15779 states, 15778 states have (on average 3.1827227785524146) internal successors, (50217), 15778 states have internal predecessors, (50217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 50217 transitions. [2021-05-03 13:59:30,980 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 50217 transitions. Word has length 24 [2021-05-03 13:59:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:30,980 INFO L480 AbstractCegarLoop]: Abstraction has 15779 states and 50217 transitions. [2021-05-03 13:59:30,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 50217 transitions. [2021-05-03 13:59:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:31,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:31,001 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:31,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-05-03 13:59:31,201 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:31,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:31,201 INFO L82 PathProgramCache]: Analyzing trace with hash 730949587, now seen corresponding path program 407 times [2021-05-03 13:59:31,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:31,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761104507] [2021-05-03 13:59:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761104507] [2021-05-03 13:59:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722049725] [2021-05-03 13:59:31,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:31,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:59:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:31,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:31,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:31,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-05-03 13:59:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934598536] [2021-05-03 13:59:31,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:59:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:59:31,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:59:31,857 INFO L87 Difference]: Start difference. First operand 15779 states and 50217 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:34,219 INFO L93 Difference]: Finished difference Result 18160 states and 56473 transitions. [2021-05-03 13:59:34,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-03 13:59:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:34,260 INFO L225 Difference]: With dead ends: 18160 [2021-05-03 13:59:34,260 INFO L226 Difference]: Without dead ends: 18136 [2021-05-03 13:59:34,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 2135.3ms TimeCoverageRelationStatistics Valid=2313, Invalid=5697, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 13:59:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18136 states. [2021-05-03 13:59:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18136 to 15810. [2021-05-03 13:59:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15810 states, 15809 states have (on average 3.183123537225631) internal successors, (50322), 15809 states have internal predecessors, (50322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 50322 transitions. [2021-05-03 13:59:34,567 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 50322 transitions. Word has length 24 [2021-05-03 13:59:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:34,567 INFO L480 AbstractCegarLoop]: Abstraction has 15810 states and 50322 transitions. [2021-05-03 13:59:34,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 50322 transitions. [2021-05-03 13:59:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:34,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:34,592 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:34,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:34,792 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:34,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:34,792 INFO L82 PathProgramCache]: Analyzing trace with hash 928227975, now seen corresponding path program 408 times [2021-05-03 13:59:34,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:34,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094435001] [2021-05-03 13:59:34,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094435001] [2021-05-03 13:59:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931871478] [2021-05-03 13:59:35,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:35,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:59:35,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:35,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:35,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-05-03 13:59:35,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545116521] [2021-05-03 13:59:35,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 13:59:35,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:35,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 13:59:35,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:59:35,964 INFO L87 Difference]: Start difference. First operand 15810 states and 50322 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:39,791 INFO L93 Difference]: Finished difference Result 16413 states and 51718 transitions. [2021-05-03 13:59:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 13:59:39,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:39,829 INFO L225 Difference]: With dead ends: 16413 [2021-05-03 13:59:39,830 INFO L226 Difference]: Without dead ends: 16413 [2021-05-03 13:59:39,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 3472.6ms TimeCoverageRelationStatistics Valid=1699, Invalid=4153, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 13:59:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16413 states. [2021-05-03 13:59:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16413 to 15703. [2021-05-03 13:59:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15703 states, 15702 states have (on average 3.1823971468602728) internal successors, (49970), 15702 states have internal predecessors, (49970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15703 states to 15703 states and 49970 transitions. [2021-05-03 13:59:40,116 INFO L78 Accepts]: Start accepts. Automaton has 15703 states and 49970 transitions. Word has length 24 [2021-05-03 13:59:40,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:40,116 INFO L480 AbstractCegarLoop]: Abstraction has 15703 states and 49970 transitions. [2021-05-03 13:59:40,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15703 states and 49970 transitions. [2021-05-03 13:59:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:40,143 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:40,143 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:40,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-05-03 13:59:40,344 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash -552061937, now seen corresponding path program 409 times [2021-05-03 13:59:40,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:40,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114940092] [2021-05-03 13:59:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:40,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114940092] [2021-05-03 13:59:40,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045711890] [2021-05-03 13:59:40,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:40,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:41,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:41,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-05-03 13:59:41,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690418602] [2021-05-03 13:59:41,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:59:41,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:59:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:59:41,308 INFO L87 Difference]: Start difference. First operand 15703 states and 49970 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:43,488 INFO L93 Difference]: Finished difference Result 16653 states and 52172 transitions. [2021-05-03 13:59:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 13:59:43,491 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:43,519 INFO L225 Difference]: With dead ends: 16653 [2021-05-03 13:59:43,519 INFO L226 Difference]: Without dead ends: 16639 [2021-05-03 13:59:43,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 2182.4ms TimeCoverageRelationStatistics Valid=1371, Invalid=3459, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 13:59:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16639 states. [2021-05-03 13:59:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16639 to 15440. [2021-05-03 13:59:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15440 states, 15439 states have (on average 3.1834315694021633) internal successors, (49149), 15439 states have internal predecessors, (49149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15440 states to 15440 states and 49149 transitions. [2021-05-03 13:59:43,779 INFO L78 Accepts]: Start accepts. Automaton has 15440 states and 49149 transitions. Word has length 24 [2021-05-03 13:59:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:43,779 INFO L480 AbstractCegarLoop]: Abstraction has 15440 states and 49149 transitions. [2021-05-03 13:59:43,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15440 states and 49149 transitions. [2021-05-03 13:59:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:43,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:43,800 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:44,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:44,000 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1154002553, now seen corresponding path program 410 times [2021-05-03 13:59:44,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:44,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63971217] [2021-05-03 13:59:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63971217] [2021-05-03 13:59:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304127085] [2021-05-03 13:59:44,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:44,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:59:44,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:44,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:44,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-03 13:59:44,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003260362] [2021-05-03 13:59:44,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:59:44,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:59:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:59:44,696 INFO L87 Difference]: Start difference. First operand 15440 states and 49149 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:47,650 INFO L93 Difference]: Finished difference Result 17145 states and 53340 transitions. [2021-05-03 13:59:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 13:59:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:47,690 INFO L225 Difference]: With dead ends: 17145 [2021-05-03 13:59:47,690 INFO L226 Difference]: Without dead ends: 17135 [2021-05-03 13:59:47,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2364.9ms TimeCoverageRelationStatistics Valid=1349, Invalid=3207, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 13:59:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17135 states. [2021-05-03 13:59:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17135 to 15065. [2021-05-03 13:59:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15065 states, 15064 states have (on average 3.1838157195963888) internal successors, (47961), 15064 states have internal predecessors, (47961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15065 states to 15065 states and 47961 transitions. [2021-05-03 13:59:47,988 INFO L78 Accepts]: Start accepts. Automaton has 15065 states and 47961 transitions. Word has length 24 [2021-05-03 13:59:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:47,988 INFO L480 AbstractCegarLoop]: Abstraction has 15065 states and 47961 transitions. [2021-05-03 13:59:47,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15065 states and 47961 transitions. [2021-05-03 13:59:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:48,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:48,013 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:48,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-05-03 13:59:48,214 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:48,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:48,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2004703985, now seen corresponding path program 411 times [2021-05-03 13:59:48,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:48,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039128128] [2021-05-03 13:59:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:48,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039128128] [2021-05-03 13:59:48,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217444011] [2021-05-03 13:59:48,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:59:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:49,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:49,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-05-03 13:59:49,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697423226] [2021-05-03 13:59:49,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:59:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:59:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:59:49,194 INFO L87 Difference]: Start difference. First operand 15065 states and 47961 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:52,592 INFO L93 Difference]: Finished difference Result 18361 states and 56965 transitions. [2021-05-03 13:59:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 13:59:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:52,633 INFO L225 Difference]: With dead ends: 18361 [2021-05-03 13:59:52,633 INFO L226 Difference]: Without dead ends: 18355 [2021-05-03 13:59:52,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 2915.7ms TimeCoverageRelationStatistics Valid=1388, Invalid=3034, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 13:59:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18355 states. [2021-05-03 13:59:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18355 to 15150. [2021-05-03 13:59:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15150 states, 15149 states have (on average 3.1832464189055383) internal successors, (48223), 15149 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15150 states to 15150 states and 48223 transitions. [2021-05-03 13:59:52,935 INFO L78 Accepts]: Start accepts. Automaton has 15150 states and 48223 transitions. Word has length 24 [2021-05-03 13:59:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:52,935 INFO L480 AbstractCegarLoop]: Abstraction has 15150 states and 48223 transitions. [2021-05-03 13:59:52,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 15150 states and 48223 transitions. [2021-05-03 13:59:52,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:52,960 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:52,960 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:53,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-05-03 13:59:53,161 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash -231030649, now seen corresponding path program 412 times [2021-05-03 13:59:53,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:53,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994840132] [2021-05-03 13:59:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:53,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994840132] [2021-05-03 13:59:53,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978754627] [2021-05-03 13:59:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:53,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:59:53,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:53,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:53,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-05-03 13:59:53,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717670912] [2021-05-03 13:59:53,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:53,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:53,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:53,955 INFO L87 Difference]: Start difference. First operand 15150 states and 48223 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:56,341 INFO L93 Difference]: Finished difference Result 20262 states and 62769 transitions. [2021-05-03 13:59:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 13:59:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 13:59:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:56,374 INFO L225 Difference]: With dead ends: 20262 [2021-05-03 13:59:56,374 INFO L226 Difference]: Without dead ends: 20260 [2021-05-03 13:59:56,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 2126.0ms TimeCoverageRelationStatistics Valid=1573, Invalid=3119, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 13:59:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20260 states. [2021-05-03 13:59:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20260 to 16488. [2021-05-03 13:59:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16488 states, 16487 states have (on average 3.178746891490265) internal successors, (52408), 16487 states have internal predecessors, (52408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16488 states to 16488 states and 52408 transitions. [2021-05-03 13:59:56,659 INFO L78 Accepts]: Start accepts. Automaton has 16488 states and 52408 transitions. Word has length 24 [2021-05-03 13:59:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:56,659 INFO L480 AbstractCegarLoop]: Abstraction has 16488 states and 52408 transitions. [2021-05-03 13:59:56,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16488 states and 52408 transitions. [2021-05-03 13:59:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 13:59:56,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:56,680 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:56,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:56,881 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1143646705, now seen corresponding path program 413 times [2021-05-03 13:59:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:56,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939531357] [2021-05-03 13:59:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:57,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939531357] [2021-05-03 13:59:57,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625851847] [2021-05-03 13:59:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:57,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:59:57,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:59:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:57,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:57,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-05-03 13:59:57,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782581428] [2021-05-03 13:59:57,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:59:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:59:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:59:57,405 INFO L87 Difference]: Start difference. First operand 16488 states and 52408 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:00,384 INFO L93 Difference]: Finished difference Result 19932 states and 61591 transitions. [2021-05-03 14:00:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 14:00:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:00,440 INFO L225 Difference]: With dead ends: 19932 [2021-05-03 14:00:00,440 INFO L226 Difference]: Without dead ends: 19932 [2021-05-03 14:00:00,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 2380.0ms TimeCoverageRelationStatistics Valid=1717, Invalid=3113, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 14:00:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19932 states. [2021-05-03 14:00:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19932 to 16990. [2021-05-03 14:00:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16990 states, 16989 states have (on average 3.183648242980752) internal successors, (54087), 16989 states have internal predecessors, (54087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16990 states to 16990 states and 54087 transitions. [2021-05-03 14:00:00,848 INFO L78 Accepts]: Start accepts. Automaton has 16990 states and 54087 transitions. Word has length 24 [2021-05-03 14:00:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:00,848 INFO L480 AbstractCegarLoop]: Abstraction has 16990 states and 54087 transitions. [2021-05-03 14:00:00,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16990 states and 54087 transitions. [2021-05-03 14:00:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:00,875 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:00,875 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:01,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:01,076 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -572191899, now seen corresponding path program 414 times [2021-05-03 14:00:01,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:01,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925357988] [2021-05-03 14:00:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:01,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925357988] [2021-05-03 14:00:01,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437146462] [2021-05-03 14:00:01,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:01,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:00:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:01,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:01,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:01,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 22 [2021-05-03 14:00:01,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192880438] [2021-05-03 14:00:01,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:00:01,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:00:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:00:01,862 INFO L87 Difference]: Start difference. First operand 16990 states and 54087 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:06,504 INFO L93 Difference]: Finished difference Result 19753 states and 61171 transitions. [2021-05-03 14:00:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 14:00:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:06,538 INFO L225 Difference]: With dead ends: 19753 [2021-05-03 14:00:06,538 INFO L226 Difference]: Without dead ends: 19744 [2021-05-03 14:00:06,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 4184.4ms TimeCoverageRelationStatistics Valid=3090, Invalid=7416, Unknown=0, NotChecked=0, Total=10506 [2021-05-03 14:00:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19744 states. [2021-05-03 14:00:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19744 to 16867. [2021-05-03 14:00:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 3.1820230048618523) internal successors, (53668), 16866 states have internal predecessors, (53668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 53668 transitions. [2021-05-03 14:00:06,903 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 53668 transitions. Word has length 24 [2021-05-03 14:00:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:06,903 INFO L480 AbstractCegarLoop]: Abstraction has 16867 states and 53668 transitions. [2021-05-03 14:00:06,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 53668 transitions. [2021-05-03 14:00:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:06,927 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:06,927 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:07,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:07,127 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:07,127 INFO L82 PathProgramCache]: Analyzing trace with hash -36962097, now seen corresponding path program 415 times [2021-05-03 14:00:07,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:07,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491914149] [2021-05-03 14:00:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491914149] [2021-05-03 14:00:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384245221] [2021-05-03 14:00:07,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:07,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:08,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:08,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 23 [2021-05-03 14:00:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199767772] [2021-05-03 14:00:08,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:00:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:00:08,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:00:08,305 INFO L87 Difference]: Start difference. First operand 16867 states and 53668 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:12,309 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 9 [2021-05-03 14:00:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:14,240 INFO L93 Difference]: Finished difference Result 19710 states and 61049 transitions. [2021-05-03 14:00:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-03 14:00:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:14,304 INFO L225 Difference]: With dead ends: 19710 [2021-05-03 14:00:14,304 INFO L226 Difference]: Without dead ends: 19698 [2021-05-03 14:00:14,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3019 ImplicationChecksByTransitivity, 5506.1ms TimeCoverageRelationStatistics Valid=2700, Invalid=6806, Unknown=0, NotChecked=0, Total=9506 [2021-05-03 14:00:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-05-03 14:00:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 16758. [2021-05-03 14:00:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16758 states, 16757 states have (on average 3.181476397923256) internal successors, (53312), 16757 states have internal predecessors, (53312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16758 states to 16758 states and 53312 transitions. [2021-05-03 14:00:14,731 INFO L78 Accepts]: Start accepts. Automaton has 16758 states and 53312 transitions. Word has length 24 [2021-05-03 14:00:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:14,731 INFO L480 AbstractCegarLoop]: Abstraction has 16758 states and 53312 transitions. [2021-05-03 14:00:14,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 16758 states and 53312 transitions. [2021-05-03 14:00:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:14,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:14,758 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:14,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-05-03 14:00:14,977 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash -624707419, now seen corresponding path program 416 times [2021-05-03 14:00:14,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:14,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551208810] [2021-05-03 14:00:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:15,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551208810] [2021-05-03 14:00:15,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292151458] [2021-05-03 14:00:15,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:15,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:00:15,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:15,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:15,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:15,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-05-03 14:00:15,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276104505] [2021-05-03 14:00:15,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:00:15,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:00:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:00:15,808 INFO L87 Difference]: Start difference. First operand 16758 states and 53312 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:20,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-03 14:00:20,612 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 14:00:21,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:21,200 INFO L93 Difference]: Finished difference Result 19755 states and 61167 transitions. [2021-05-03 14:00:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-03 14:00:21,205 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:21,253 INFO L225 Difference]: With dead ends: 19755 [2021-05-03 14:00:21,253 INFO L226 Difference]: Without dead ends: 19737 [2021-05-03 14:00:21,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 4820.7ms TimeCoverageRelationStatistics Valid=2410, Invalid=6332, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 14:00:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-05-03 14:00:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 16856. [2021-05-03 14:00:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16856 states, 16855 states have (on average 3.18119252447345) internal successors, (53619), 16855 states have internal predecessors, (53619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16856 states to 16856 states and 53619 transitions. [2021-05-03 14:00:21,692 INFO L78 Accepts]: Start accepts. Automaton has 16856 states and 53619 transitions. Word has length 24 [2021-05-03 14:00:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:21,693 INFO L480 AbstractCegarLoop]: Abstraction has 16856 states and 53619 transitions. [2021-05-03 14:00:21,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 16856 states and 53619 transitions. [2021-05-03 14:00:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:21,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:21,722 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:21,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:21,936 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1664943217, now seen corresponding path program 417 times [2021-05-03 14:00:21,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:21,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179058472] [2021-05-03 14:00:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:22,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179058472] [2021-05-03 14:00:22,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982387228] [2021-05-03 14:00:22,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:22,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:00:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:22,723 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-03 14:00:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:23,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:23,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-05-03 14:00:23,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370084081] [2021-05-03 14:00:23,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:00:23,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:23,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:00:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:00:23,340 INFO L87 Difference]: Start difference. First operand 16856 states and 53619 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:29,118 INFO L93 Difference]: Finished difference Result 20000 states and 61915 transitions. [2021-05-03 14:00:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 14:00:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:29,164 INFO L225 Difference]: With dead ends: 20000 [2021-05-03 14:00:29,164 INFO L226 Difference]: Without dead ends: 19976 [2021-05-03 14:00:29,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 5500.2ms TimeCoverageRelationStatistics Valid=2220, Invalid=5970, Unknown=0, NotChecked=0, Total=8190 [2021-05-03 14:00:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19976 states. [2021-05-03 14:00:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19976 to 17037. [2021-05-03 14:00:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17037 states, 17036 states have (on average 3.181908898802536) internal successors, (54207), 17036 states have internal predecessors, (54207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17037 states to 17037 states and 54207 transitions. [2021-05-03 14:00:29,604 INFO L78 Accepts]: Start accepts. Automaton has 17037 states and 54207 transitions. Word has length 24 [2021-05-03 14:00:29,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:29,604 INFO L480 AbstractCegarLoop]: Abstraction has 17037 states and 54207 transitions. [2021-05-03 14:00:29,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:29,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17037 states and 54207 transitions. [2021-05-03 14:00:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:29,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:29,639 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:29,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-05-03 14:00:29,857 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash 447485413, now seen corresponding path program 418 times [2021-05-03 14:00:29,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:29,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847175104] [2021-05-03 14:00:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847175104] [2021-05-03 14:00:30,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119077034] [2021-05-03 14:00:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:30,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:00:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:30,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:30,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-05-03 14:00:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131591793] [2021-05-03 14:00:30,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:00:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:00:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:00:30,892 INFO L87 Difference]: Start difference. First operand 17037 states and 54207 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:34,386 INFO L93 Difference]: Finished difference Result 19762 states and 61367 transitions. [2021-05-03 14:00:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-03 14:00:34,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:34,434 INFO L225 Difference]: With dead ends: 19762 [2021-05-03 14:00:34,435 INFO L226 Difference]: Without dead ends: 19732 [2021-05-03 14:00:34,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 3366.1ms TimeCoverageRelationStatistics Valid=2129, Invalid=5703, Unknown=0, NotChecked=0, Total=7832 [2021-05-03 14:00:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19732 states. [2021-05-03 14:00:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19732 to 17071. [2021-05-03 14:00:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17071 states, 17070 states have (on average 3.1825424721734037) internal successors, (54326), 17070 states have internal predecessors, (54326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17071 states to 17071 states and 54326 transitions. [2021-05-03 14:00:34,878 INFO L78 Accepts]: Start accepts. Automaton has 17071 states and 54326 transitions. Word has length 24 [2021-05-03 14:00:34,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:34,878 INFO L480 AbstractCegarLoop]: Abstraction has 17071 states and 54326 transitions. [2021-05-03 14:00:34,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:34,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17071 states and 54326 transitions. [2021-05-03 14:00:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:34,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:34,905 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:35,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:35,125 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1685657901, now seen corresponding path program 419 times [2021-05-03 14:00:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:35,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56558826] [2021-05-03 14:00:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56558826] [2021-05-03 14:00:35,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745463774] [2021-05-03 14:00:35,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:35,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:00:35,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:35,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:36,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:36,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 14:00:36,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96121260] [2021-05-03 14:00:36,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:00:36,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:00:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:00:36,727 INFO L87 Difference]: Start difference. First operand 17071 states and 54326 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:42,048 INFO L93 Difference]: Finished difference Result 18326 states and 57555 transitions. [2021-05-03 14:00:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 14:00:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:42,093 INFO L225 Difference]: With dead ends: 18326 [2021-05-03 14:00:42,093 INFO L226 Difference]: Without dead ends: 18326 [2021-05-03 14:00:42,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 4808.3ms TimeCoverageRelationStatistics Valid=1794, Invalid=4526, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 14:00:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18326 states. [2021-05-03 14:00:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18326 to 17148. [2021-05-03 14:00:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17148 states, 17147 states have (on average 3.1787484691199626) internal successors, (54506), 17147 states have internal predecessors, (54506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17148 states to 17148 states and 54506 transitions. [2021-05-03 14:00:42,489 INFO L78 Accepts]: Start accepts. Automaton has 17148 states and 54506 transitions. Word has length 24 [2021-05-03 14:00:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:42,489 INFO L480 AbstractCegarLoop]: Abstraction has 17148 states and 54506 transitions. [2021-05-03 14:00:42,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 17148 states and 54506 transitions. [2021-05-03 14:00:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:42,522 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:42,522 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:42,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-05-03 14:00:42,743 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 518617555, now seen corresponding path program 420 times [2021-05-03 14:00:42,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:42,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100023999] [2021-05-03 14:00:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100023999] [2021-05-03 14:00:42,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622056426] [2021-05-03 14:00:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:42,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:00:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:43,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:43,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-05-03 14:00:43,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931114477] [2021-05-03 14:00:43,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:00:43,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:00:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:00:43,738 INFO L87 Difference]: Start difference. First operand 17148 states and 54506 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:47,034 INFO L93 Difference]: Finished difference Result 19278 states and 60184 transitions. [2021-05-03 14:00:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 14:00:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:47,070 INFO L225 Difference]: With dead ends: 19278 [2021-05-03 14:00:47,070 INFO L226 Difference]: Without dead ends: 19278 [2021-05-03 14:00:47,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2863.5ms TimeCoverageRelationStatistics Valid=1413, Invalid=3699, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 14:00:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19278 states. [2021-05-03 14:00:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19278 to 17371. [2021-05-03 14:00:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.1773172135866434) internal successors, (55190), 17370 states have internal predecessors, (55190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 55190 transitions. [2021-05-03 14:00:47,452 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 55190 transitions. Word has length 24 [2021-05-03 14:00:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:47,453 INFO L480 AbstractCegarLoop]: Abstraction has 17371 states and 55190 transitions. [2021-05-03 14:00:47,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 55190 transitions. [2021-05-03 14:00:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:47,488 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:47,488 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:47,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:47,708 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:47,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash 728270547, now seen corresponding path program 421 times [2021-05-03 14:00:47,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:47,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673588456] [2021-05-03 14:00:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:47,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:47,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673588456] [2021-05-03 14:00:47,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451545262] [2021-05-03 14:00:47,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:48,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:49,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:49,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-05-03 14:00:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128284782] [2021-05-03 14:00:49,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:00:49,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:49,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:00:49,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:00:49,164 INFO L87 Difference]: Start difference. First operand 17371 states and 55190 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:53,908 INFO L93 Difference]: Finished difference Result 20178 states and 62903 transitions. [2021-05-03 14:00:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 14:00:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:53,970 INFO L225 Difference]: With dead ends: 20178 [2021-05-03 14:00:53,970 INFO L226 Difference]: Without dead ends: 20178 [2021-05-03 14:00:53,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 4242.2ms TimeCoverageRelationStatistics Valid=1369, Invalid=3461, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 14:00:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20178 states. [2021-05-03 14:00:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20178 to 17685. [2021-05-03 14:00:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17685 states, 17684 states have (on average 3.17852295860665) internal successors, (56209), 17684 states have internal predecessors, (56209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17685 states to 17685 states and 56209 transitions. [2021-05-03 14:00:54,406 INFO L78 Accepts]: Start accepts. Automaton has 17685 states and 56209 transitions. Word has length 24 [2021-05-03 14:00:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:54,406 INFO L480 AbstractCegarLoop]: Abstraction has 17685 states and 56209 transitions. [2021-05-03 14:00:54,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17685 states and 56209 transitions. [2021-05-03 14:00:54,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:54,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:54,438 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:54,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:54,661 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1012128211, now seen corresponding path program 422 times [2021-05-03 14:00:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:54,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700065341] [2021-05-03 14:00:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:54,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700065341] [2021-05-03 14:00:54,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120398277] [2021-05-03 14:00:54,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:54,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:00:54,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:00:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:55,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:55,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-05-03 14:00:55,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311089007] [2021-05-03 14:00:55,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:00:55,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:00:55,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:00:55,700 INFO L87 Difference]: Start difference. First operand 17685 states and 56209 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:56,343 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-05-03 14:00:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:59,311 INFO L93 Difference]: Finished difference Result 21110 states and 65699 transitions. [2021-05-03 14:00:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 14:00:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:00:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:59,365 INFO L225 Difference]: With dead ends: 21110 [2021-05-03 14:00:59,365 INFO L226 Difference]: Without dead ends: 21110 [2021-05-03 14:00:59,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3081.8ms TimeCoverageRelationStatistics Valid=1403, Invalid=3289, Unknown=0, NotChecked=0, Total=4692 [2021-05-03 14:00:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21110 states. [2021-05-03 14:00:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21110 to 18003. [2021-05-03 14:00:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18003 states, 18002 states have (on average 3.180702144206199) internal successors, (57259), 18002 states have internal predecessors, (57259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18003 states to 18003 states and 57259 transitions. [2021-05-03 14:00:59,787 INFO L78 Accepts]: Start accepts. Automaton has 18003 states and 57259 transitions. Word has length 24 [2021-05-03 14:00:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:59,787 INFO L480 AbstractCegarLoop]: Abstraction has 18003 states and 57259 transitions. [2021-05-03 14:00:59,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18003 states and 57259 transitions. [2021-05-03 14:00:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:00:59,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:59,814 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:00,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:00,033 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2026756397, now seen corresponding path program 423 times [2021-05-03 14:01:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:00,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062170960] [2021-05-03 14:01:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:00,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062170960] [2021-05-03 14:01:00,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226478377] [2021-05-03 14:01:00,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:00,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:01:00,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:00,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:00,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:01,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:01,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-05-03 14:01:01,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405099750] [2021-05-03 14:01:01,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:01:01,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:01,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:01:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:01:01,398 INFO L87 Difference]: Start difference. First operand 18003 states and 57259 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:06,333 INFO L93 Difference]: Finished difference Result 22604 states and 70090 transitions. [2021-05-03 14:01:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 14:01:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:06,406 INFO L225 Difference]: With dead ends: 22604 [2021-05-03 14:01:06,407 INFO L226 Difference]: Without dead ends: 22604 [2021-05-03 14:01:06,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 4331.5ms TimeCoverageRelationStatistics Valid=1595, Invalid=3375, Unknown=0, NotChecked=0, Total=4970 [2021-05-03 14:01:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22604 states. [2021-05-03 14:01:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22604 to 18724. [2021-05-03 14:01:06,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18723 states have (on average 3.182395983549645) internal successors, (59584), 18723 states have internal predecessors, (59584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 59584 transitions. [2021-05-03 14:01:06,997 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 59584 transitions. Word has length 24 [2021-05-03 14:01:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:06,998 INFO L480 AbstractCegarLoop]: Abstraction has 18724 states and 59584 transitions. [2021-05-03 14:01:06,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 59584 transitions. [2021-05-03 14:01:07,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:07,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:07,044 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:07,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-05-03 14:01:07,257 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1893087699, now seen corresponding path program 424 times [2021-05-03 14:01:07,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:07,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431580247] [2021-05-03 14:01:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431580247] [2021-05-03 14:01:07,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90857088] [2021-05-03 14:01:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:07,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:01:07,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:08,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:08,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-05-03 14:01:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458343534] [2021-05-03 14:01:08,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:01:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:01:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:01:08,633 INFO L87 Difference]: Start difference. First operand 18724 states and 59584 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:13,452 INFO L93 Difference]: Finished difference Result 26877 states and 83547 transitions. [2021-05-03 14:01:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 14:01:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:13,529 INFO L225 Difference]: With dead ends: 26877 [2021-05-03 14:01:13,530 INFO L226 Difference]: Without dead ends: 26877 [2021-05-03 14:01:13,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 4192.8ms TimeCoverageRelationStatistics Valid=1679, Invalid=3151, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 14:01:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26877 states. [2021-05-03 14:01:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26877 to 23210. [2021-05-03 14:01:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23210 states, 23209 states have (on average 3.1894092808824164) internal successors, (74023), 23209 states have internal predecessors, (74023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23210 states to 23210 states and 74023 transitions. [2021-05-03 14:01:14,132 INFO L78 Accepts]: Start accepts. Automaton has 23210 states and 74023 transitions. Word has length 24 [2021-05-03 14:01:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:14,132 INFO L480 AbstractCegarLoop]: Abstraction has 23210 states and 74023 transitions. [2021-05-03 14:01:14,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 23210 states and 74023 transitions. [2021-05-03 14:01:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:14,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:14,169 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:14,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:14,390 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:14,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1830424791, now seen corresponding path program 425 times [2021-05-03 14:01:14,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:14,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859051729] [2021-05-03 14:01:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859051729] [2021-05-03 14:01:14,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574482123] [2021-05-03 14:01:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:14,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:01:14,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:14,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:15,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:15,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-05-03 14:01:15,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175392867] [2021-05-03 14:01:15,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:01:15,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:01:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:01:15,252 INFO L87 Difference]: Start difference. First operand 23210 states and 74023 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:22,953 INFO L93 Difference]: Finished difference Result 25835 states and 80460 transitions. [2021-05-03 14:01:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-03 14:01:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:23,051 INFO L225 Difference]: With dead ends: 25835 [2021-05-03 14:01:23,051 INFO L226 Difference]: Without dead ends: 25829 [2021-05-03 14:01:23,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 6875.8ms TimeCoverageRelationStatistics Valid=3452, Invalid=8980, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 14:01:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25829 states. [2021-05-03 14:01:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25829 to 23125. [2021-05-03 14:01:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23125 states, 23124 states have (on average 3.187900017298045) internal successors, (73717), 23124 states have internal predecessors, (73717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23125 states to 23125 states and 73717 transitions. [2021-05-03 14:01:23,724 INFO L78 Accepts]: Start accepts. Automaton has 23125 states and 73717 transitions. Word has length 24 [2021-05-03 14:01:23,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:23,724 INFO L480 AbstractCegarLoop]: Abstraction has 23125 states and 73717 transitions. [2021-05-03 14:01:23,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23125 states and 73717 transitions. [2021-05-03 14:01:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:23,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:23,767 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:23,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:23,991 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1295194989, now seen corresponding path program 426 times [2021-05-03 14:01:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:23,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300909467] [2021-05-03 14:01:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:24,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300909467] [2021-05-03 14:01:24,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889288397] [2021-05-03 14:01:24,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:24,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:01:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:24,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2021-05-03 14:01:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141541380] [2021-05-03 14:01:24,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:01:24,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:01:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:01:24,943 INFO L87 Difference]: Start difference. First operand 23125 states and 73717 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:30,560 INFO L93 Difference]: Finished difference Result 25817 states and 80521 transitions. [2021-05-03 14:01:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-03 14:01:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:30,647 INFO L225 Difference]: With dead ends: 25817 [2021-05-03 14:01:30,647 INFO L226 Difference]: Without dead ends: 25805 [2021-05-03 14:01:30,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 5093.8ms TimeCoverageRelationStatistics Valid=2955, Invalid=7965, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 14:01:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25805 states. [2021-05-03 14:01:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25805 to 23100. [2021-05-03 14:01:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23100 states, 23099 states have (on average 3.188536300272739) internal successors, (73652), 23099 states have internal predecessors, (73652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23100 states to 23100 states and 73652 transitions. [2021-05-03 14:01:31,493 INFO L78 Accepts]: Start accepts. Automaton has 23100 states and 73652 transitions. Word has length 24 [2021-05-03 14:01:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:31,493 INFO L480 AbstractCegarLoop]: Abstraction has 23100 states and 73652 transitions. [2021-05-03 14:01:31,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 23100 states and 73652 transitions. [2021-05-03 14:01:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:31,533 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:31,533 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:31,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:31,756 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1882940311, now seen corresponding path program 427 times [2021-05-03 14:01:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:31,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273371106] [2021-05-03 14:01:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:32,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273371106] [2021-05-03 14:01:32,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471786960] [2021-05-03 14:01:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:33,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:33,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-05-03 14:01:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973904734] [2021-05-03 14:01:33,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:01:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:01:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:01:33,186 INFO L87 Difference]: Start difference. First operand 23100 states and 73652 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:37,763 INFO L93 Difference]: Finished difference Result 25937 states and 80963 transitions. [2021-05-03 14:01:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 14:01:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:37,811 INFO L225 Difference]: With dead ends: 25937 [2021-05-03 14:01:37,811 INFO L226 Difference]: Without dead ends: 25919 [2021-05-03 14:01:37,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 4354.4ms TimeCoverageRelationStatistics Valid=2546, Invalid=7156, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 14:01:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25919 states. [2021-05-03 14:01:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25919 to 23155. [2021-05-03 14:01:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23155 states, 23154 states have (on average 3.18916817828453) internal successors, (73842), 23154 states have internal predecessors, (73842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23155 states to 23155 states and 73842 transitions. [2021-05-03 14:01:38,359 INFO L78 Accepts]: Start accepts. Automaton has 23155 states and 73842 transitions. Word has length 24 [2021-05-03 14:01:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:38,359 INFO L480 AbstractCegarLoop]: Abstraction has 23155 states and 73842 transitions. [2021-05-03 14:01:38,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 23155 states and 73842 transitions. [2021-05-03 14:01:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:38,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:38,395 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:38,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-05-03 14:01:38,609 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:38,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1371791187, now seen corresponding path program 428 times [2021-05-03 14:01:38,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:38,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131266503] [2021-05-03 14:01:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:38,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131266503] [2021-05-03 14:01:38,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745461170] [2021-05-03 14:01:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:38,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:01:38,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:38,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:39,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:39,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-05-03 14:01:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868533128] [2021-05-03 14:01:39,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:01:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:01:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:01:39,588 INFO L87 Difference]: Start difference. First operand 23155 states and 73842 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:43,203 INFO L93 Difference]: Finished difference Result 26264 states and 82006 transitions. [2021-05-03 14:01:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-03 14:01:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:43,249 INFO L225 Difference]: With dead ends: 26264 [2021-05-03 14:01:43,249 INFO L226 Difference]: Without dead ends: 26240 [2021-05-03 14:01:43,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 3302.6ms TimeCoverageRelationStatistics Valid=2232, Invalid=6510, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 14:01:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26240 states. [2021-05-03 14:01:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26240 to 23691. [2021-05-03 14:01:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23691 states, 23690 states have (on average 3.1908400168847617) internal successors, (75591), 23690 states have internal predecessors, (75591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23691 states to 23691 states and 75591 transitions. [2021-05-03 14:01:43,704 INFO L78 Accepts]: Start accepts. Automaton has 23691 states and 75591 transitions. Word has length 24 [2021-05-03 14:01:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:43,704 INFO L480 AbstractCegarLoop]: Abstraction has 23691 states and 75591 transitions. [2021-05-03 14:01:43,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 23691 states and 75591 transitions. [2021-05-03 14:01:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:43,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:43,733 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:43,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-05-03 14:01:43,934 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash -810747479, now seen corresponding path program 429 times [2021-05-03 14:01:43,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:43,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338741465] [2021-05-03 14:01:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:44,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338741465] [2021-05-03 14:01:44,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414109228] [2021-05-03 14:01:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:44,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:01:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:44,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:44,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:44,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-05-03 14:01:44,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019316967] [2021-05-03 14:01:44,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 14:01:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 14:01:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:01:44,856 INFO L87 Difference]: Start difference. First operand 23691 states and 75591 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:48,626 INFO L93 Difference]: Finished difference Result 26956 states and 84218 transitions. [2021-05-03 14:01:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 14:01:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:48,680 INFO L225 Difference]: With dead ends: 26956 [2021-05-03 14:01:48,680 INFO L226 Difference]: Without dead ends: 26926 [2021-05-03 14:01:48,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 3529.5ms TimeCoverageRelationStatistics Valid=2019, Invalid=5991, Unknown=0, NotChecked=0, Total=8010 [2021-05-03 14:01:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-05-03 14:01:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 24343. [2021-05-03 14:01:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24343 states, 24342 states have (on average 3.1921370470791226) internal successors, (77703), 24342 states have internal predecessors, (77703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24343 states to 24343 states and 77703 transitions. [2021-05-03 14:01:49,240 INFO L78 Accepts]: Start accepts. Automaton has 24343 states and 77703 transitions. Word has length 24 [2021-05-03 14:01:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:49,240 INFO L480 AbstractCegarLoop]: Abstraction has 24343 states and 77703 transitions. [2021-05-03 14:01:49,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24343 states and 77703 transitions. [2021-05-03 14:01:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:01:49,273 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:49,273 INFO L551 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:49,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-05-03 14:01:49,473 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:49,474 INFO L82 PathProgramCache]: Analyzing trace with hash 250030611, now seen corresponding path program 430 times [2021-05-03 14:01:49,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:49,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967163468] [2021-05-03 14:01:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:49,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967163468] [2021-05-03 14:01:49,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321915880] [2021-05-03 14:01:49,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:49,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:01:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:49,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:01:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:50,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:50,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 14:01:50,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232689558] [2021-05-03 14:01:50,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 14:01:50,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 14:01:50,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:01:50,434 INFO L87 Difference]: Start difference. First operand 24343 states and 77703 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:54,067 INFO L93 Difference]: Finished difference Result 26813 states and 84024 transitions. [2021-05-03 14:01:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 14:01:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:01:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:54,150 INFO L225 Difference]: With dead ends: 26813 [2021-05-03 14:01:54,150 INFO L226 Difference]: Without dead ends: 26777 [2021-05-03 14:01:54,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 3415.8ms TimeCoverageRelationStatistics Valid=1912, Invalid=5570, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 14:01:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26777 states. [2021-05-03 14:01:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26777 to 24407. [2021-05-03 14:01:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24407 states, 24406 states have (on average 3.1917561255428994) internal successors, (77898), 24406 states have internal predecessors, (77898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24407 states to 24407 states and 77898 transitions. [2021-05-03 14:01:54,767 INFO L78 Accepts]: Start accepts. Automaton has 24407 states and 77898 transitions. Word has length 24 [2021-05-03 14:01:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:54,767 INFO L480 AbstractCegarLoop]: Abstraction has 24407 states and 77898 transitions. [2021-05-03 14:01:54,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 24407 states and 77898 transitions. [2021-05-03 14:01:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:01:54,811 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:54,811 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:55,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable723,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:55,025 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:55,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1425864693, now seen corresponding path program 431 times [2021-05-03 14:01:55,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:55,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601719624] [2021-05-03 14:01:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601719624] [2021-05-03 14:01:55,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307010915] [2021-05-03 14:01:55,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:56,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:01:56,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:01:56,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:57,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:57,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:01:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290649816] [2021-05-03 14:01:57,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:01:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:01:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:01:57,435 INFO L87 Difference]: Start difference. First operand 24407 states and 77898 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:01,049 INFO L93 Difference]: Finished difference Result 24899 states and 78823 transitions. [2021-05-03 14:02:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:02:01,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:01,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:01,106 INFO L225 Difference]: With dead ends: 24899 [2021-05-03 14:02:01,107 INFO L226 Difference]: Without dead ends: 24867 [2021-05-03 14:02:01,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2605.4ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:02:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-05-03 14:02:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 24479. [2021-05-03 14:02:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24479 states, 24478 states have (on average 3.185145845248795) internal successors, (77966), 24478 states have internal predecessors, (77966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24479 states to 24479 states and 77966 transitions. [2021-05-03 14:02:01,648 INFO L78 Accepts]: Start accepts. Automaton has 24479 states and 77966 transitions. Word has length 25 [2021-05-03 14:02:01,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:01,648 INFO L480 AbstractCegarLoop]: Abstraction has 24479 states and 77966 transitions. [2021-05-03 14:02:01,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 24479 states and 77966 transitions. [2021-05-03 14:02:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:01,688 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:01,688 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:01,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:01,901 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash 983845119, now seen corresponding path program 432 times [2021-05-03 14:02:01,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:01,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008076664] [2021-05-03 14:02:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:02,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008076664] [2021-05-03 14:02:02,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492168975] [2021-05-03 14:02:02,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:02,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:02:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:02,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:03,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:03,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-05-03 14:02:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064305388] [2021-05-03 14:02:03,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:02:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:02:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:02:03,909 INFO L87 Difference]: Start difference. First operand 24479 states and 77966 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:05,713 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-03 14:02:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:06,372 INFO L93 Difference]: Finished difference Result 25039 states and 79187 transitions. [2021-05-03 14:02:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:02:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:06,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:06,458 INFO L225 Difference]: With dead ends: 25039 [2021-05-03 14:02:06,458 INFO L226 Difference]: Without dead ends: 25032 [2021-05-03 14:02:06,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1999.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:02:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25032 states. [2021-05-03 14:02:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25032 to 24640. [2021-05-03 14:02:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24640 states, 24639 states have (on average 3.186979991071066) internal successors, (78524), 24639 states have internal predecessors, (78524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24640 states to 24640 states and 78524 transitions. [2021-05-03 14:02:07,095 INFO L78 Accepts]: Start accepts. Automaton has 24640 states and 78524 transitions. Word has length 25 [2021-05-03 14:02:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:07,095 INFO L480 AbstractCegarLoop]: Abstraction has 24640 states and 78524 transitions. [2021-05-03 14:02:07,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24640 states and 78524 transitions. [2021-05-03 14:02:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:07,146 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:07,146 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:07,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:07,361 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:07,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1696419453, now seen corresponding path program 433 times [2021-05-03 14:02:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:07,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937822036] [2021-05-03 14:02:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:08,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937822036] [2021-05-03 14:02:08,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865965234] [2021-05-03 14:02:08,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:09,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:09,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-05-03 14:02:09,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651162548] [2021-05-03 14:02:09,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:02:09,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:02:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:02:09,100 INFO L87 Difference]: Start difference. First operand 24640 states and 78524 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:10,929 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 14:02:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:11,409 INFO L93 Difference]: Finished difference Result 25025 states and 79167 transitions. [2021-05-03 14:02:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:02:11,413 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:11,479 INFO L225 Difference]: With dead ends: 25025 [2021-05-03 14:02:11,479 INFO L226 Difference]: Without dead ends: 25009 [2021-05-03 14:02:11,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1891.6ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:02:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25009 states. [2021-05-03 14:02:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25009 to 24488. [2021-05-03 14:02:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:12,130 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:12,130 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:12,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:12,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:12,167 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:12,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-05-03 14:02:12,381 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1555299925, now seen corresponding path program 434 times [2021-05-03 14:02:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:12,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014710181] [2021-05-03 14:02:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:13,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014710181] [2021-05-03 14:02:13,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401041468] [2021-05-03 14:02:13,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:02:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:14,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:14,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:02:14,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370494542] [2021-05-03 14:02:14,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:14,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:14,079 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:16,483 INFO L93 Difference]: Finished difference Result 24884 states and 78643 transitions. [2021-05-03 14:02:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:02:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:16,556 INFO L225 Difference]: With dead ends: 24884 [2021-05-03 14:02:16,556 INFO L226 Difference]: Without dead ends: 24877 [2021-05-03 14:02:16,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1784.9ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:02:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2021-05-03 14:02:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 24488. [2021-05-03 14:02:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:17,147 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:17,147 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:17,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:17,355 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:17,355 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:17,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-05-03 14:02:17,569 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2090529727, now seen corresponding path program 435 times [2021-05-03 14:02:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:17,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102405307] [2021-05-03 14:02:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:18,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102405307] [2021-05-03 14:02:18,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655181025] [2021-05-03 14:02:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:18,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:02:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:19,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:19,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:02:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626914770] [2021-05-03 14:02:19,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:19,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:19,497 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:22,043 INFO L93 Difference]: Finished difference Result 24901 states and 78668 transitions. [2021-05-03 14:02:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:02:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:22,147 INFO L225 Difference]: With dead ends: 24901 [2021-05-03 14:02:22,148 INFO L226 Difference]: Without dead ends: 24894 [2021-05-03 14:02:22,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1940.7ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:02:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24894 states. [2021-05-03 14:02:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24894 to 24488. [2021-05-03 14:02:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:22,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:22,888 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:22,888 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:22,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:22,935 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:22,935 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:23,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:23,149 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:23,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1502784405, now seen corresponding path program 436 times [2021-05-03 14:02:23,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:23,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611764114] [2021-05-03 14:02:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:23,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611764114] [2021-05-03 14:02:23,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147474492] [2021-05-03 14:02:23,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:24,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:02:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:25,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:02:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427376118] [2021-05-03 14:02:25,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:25,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:25,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:25,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:25,284 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:27,818 INFO L93 Difference]: Finished difference Result 24921 states and 78698 transitions. [2021-05-03 14:02:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:02:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:27,881 INFO L225 Difference]: With dead ends: 24921 [2021-05-03 14:02:27,881 INFO L226 Difference]: Without dead ends: 24914 [2021-05-03 14:02:27,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2069.1ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:02:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24914 states. [2021-05-03 14:02:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24914 to 24488. [2021-05-03 14:02:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:28,445 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:28,445 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:28,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:28,487 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:28,487 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:28,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:28,701 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash 462548607, now seen corresponding path program 437 times [2021-05-03 14:02:28,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:28,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927772022] [2021-05-03 14:02:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:29,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927772022] [2021-05-03 14:02:29,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862071198] [2021-05-03 14:02:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:29,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:02:29,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:29,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:30,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:30,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:02:30,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686299154] [2021-05-03 14:02:30,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:30,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:30,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:30,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:30,874 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:33,947 INFO L93 Difference]: Finished difference Result 24944 states and 78733 transitions. [2021-05-03 14:02:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:02:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:34,011 INFO L225 Difference]: With dead ends: 24944 [2021-05-03 14:02:34,012 INFO L226 Difference]: Without dead ends: 24937 [2021-05-03 14:02:34,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2439.5ms TimeCoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:02:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24937 states. [2021-05-03 14:02:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24937 to 24488. [2021-05-03 14:02:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:34,641 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:34,641 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:34,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:34,685 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:34,685 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:34,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-05-03 14:02:34,906 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:34,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1719990059, now seen corresponding path program 438 times [2021-05-03 14:02:34,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:34,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633309243] [2021-05-03 14:02:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633309243] [2021-05-03 14:02:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593798559] [2021-05-03 14:02:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:36,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:02:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:37,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:37,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-05-03 14:02:37,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678843394] [2021-05-03 14:02:37,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:37,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:37,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:37,370 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:40,653 INFO L93 Difference]: Finished difference Result 24802 states and 78491 transitions. [2021-05-03 14:02:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:02:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:40,728 INFO L225 Difference]: With dead ends: 24802 [2021-05-03 14:02:40,729 INFO L226 Difference]: Without dead ends: 24795 [2021-05-03 14:02:40,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2859.8ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:02:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24795 states. [2021-05-03 14:02:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24795 to 24488. [2021-05-03 14:02:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24488 states, 24487 states have (on average 3.1845469024380284) internal successors, (77980), 24487 states have internal predecessors, (77980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24488 states to 24488 states and 77980 transitions. [2021-05-03 14:02:41,503 INFO L78 Accepts]: Start accepts. Automaton has 24488 states and 77980 transitions. Word has length 25 [2021-05-03 14:02:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:41,504 INFO L480 AbstractCegarLoop]: Abstraction has 24488 states and 77980 transitions. [2021-05-03 14:02:41,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 24488 states and 77980 transitions. [2021-05-03 14:02:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:41,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:41,547 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:41,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable745,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:41,757 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1617763643, now seen corresponding path program 439 times [2021-05-03 14:02:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645249663] [2021-05-03 14:02:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:42,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645249663] [2021-05-03 14:02:42,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680649257] [2021-05-03 14:02:42,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:42,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:43,801 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-03 14:02:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:44,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:44,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-05-03 14:02:44,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193678193] [2021-05-03 14:02:44,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:02:44,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:44,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:02:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:02:44,337 INFO L87 Difference]: Start difference. First operand 24488 states and 77980 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:46,144 INFO L93 Difference]: Finished difference Result 25074 states and 79435 transitions. [2021-05-03 14:02:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:02:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:46,315 INFO L225 Difference]: With dead ends: 25074 [2021-05-03 14:02:46,315 INFO L226 Difference]: Without dead ends: 25067 [2021-05-03 14:02:46,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2296.9ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:02:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25067 states. [2021-05-03 14:02:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25067 to 24661. [2021-05-03 14:02:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1872668288726684) internal successors, (78598), 24660 states have internal predecessors, (78598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78598 transitions. [2021-05-03 14:02:46,927 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78598 transitions. Word has length 25 [2021-05-03 14:02:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:46,927 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78598 transitions. [2021-05-03 14:02:46,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78598 transitions. [2021-05-03 14:02:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:47,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:47,089 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:47,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:47,297 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1062500929, now seen corresponding path program 440 times [2021-05-03 14:02:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:47,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500288905] [2021-05-03 14:02:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500288905] [2021-05-03 14:02:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883582774] [2021-05-03 14:02:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:48,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:02:48,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:48,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:49,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:49,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 23 [2021-05-03 14:02:49,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819490150] [2021-05-03 14:02:49,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:02:49,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:02:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:02:49,791 INFO L87 Difference]: Start difference. First operand 24661 states and 78598 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:51,628 INFO L93 Difference]: Finished difference Result 25075 states and 79432 transitions. [2021-05-03 14:02:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:51,691 INFO L225 Difference]: With dead ends: 25075 [2021-05-03 14:02:51,692 INFO L226 Difference]: Without dead ends: 25066 [2021-05-03 14:02:51,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2445.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:02:51,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25066 states. [2021-05-03 14:02:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25066 to 24661. [2021-05-03 14:02:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-05-03 14:02:52,450 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-05-03 14:02:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:52,450 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-05-03 14:02:52,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:52,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-05-03 14:02:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:52,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:52,493 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:52,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-05-03 14:02:52,715 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:52,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1153172539, now seen corresponding path program 441 times [2021-05-03 14:02:52,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:52,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906638751] [2021-05-03 14:02:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:53,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906638751] [2021-05-03 14:02:53,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717864673] [2021-05-03 14:02:53,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:53,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:02:53,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:55,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:55,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-05-03 14:02:55,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562959922] [2021-05-03 14:02:55,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:02:55,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:55,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:02:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:02:55,516 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:57,365 INFO L93 Difference]: Finished difference Result 24947 states and 79111 transitions. [2021-05-03 14:02:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:57,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:02:57,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:57,436 INFO L225 Difference]: With dead ends: 24947 [2021-05-03 14:02:57,436 INFO L226 Difference]: Without dead ends: 24940 [2021-05-03 14:02:57,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2652.8ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:02:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-05-03 14:02:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 24661. [2021-05-03 14:02:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24661 states, 24660 states have (on average 3.1870235198702352) internal successors, (78592), 24660 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 78592 transitions. [2021-05-03 14:02:58,117 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 78592 transitions. Word has length 25 [2021-05-03 14:02:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:58,117 INFO L480 AbstractCegarLoop]: Abstraction has 24661 states and 78592 transitions. [2021-05-03 14:02:58,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 78592 transitions. [2021-05-03 14:02:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:02:58,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:58,155 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:58,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-05-03 14:02:58,377 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash -205598593, now seen corresponding path program 442 times [2021-05-03 14:02:58,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:58,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205767323] [2021-05-03 14:02:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:59,230 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 8 [2021-05-03 14:02:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:02:59,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205767323] [2021-05-03 14:02:59,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847581124] [2021-05-03 14:02:59,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:59,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:02:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:59,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:02:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:00,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:00,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-05-03 14:03:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459027110] [2021-05-03 14:03:00,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:00,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:00,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:00,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:00,730 INFO L87 Difference]: Start difference. First operand 24661 states and 78592 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:02,324 INFO L93 Difference]: Finished difference Result 25694 states and 81409 transitions. [2021-05-03 14:03:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:02,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:02,478 INFO L225 Difference]: With dead ends: 25694 [2021-05-03 14:03:02,478 INFO L226 Difference]: Without dead ends: 25677 [2021-05-03 14:03:02,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2313.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25677 states. [2021-05-03 14:03:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25677 to 25073. [2021-05-03 14:03:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25073 states, 25072 states have (on average 3.1924058710912573) internal successors, (80040), 25072 states have internal predecessors, (80040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25073 states to 25073 states and 80040 transitions. [2021-05-03 14:03:02,940 INFO L78 Accepts]: Start accepts. Automaton has 25073 states and 80040 transitions. Word has length 25 [2021-05-03 14:03:02,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:02,940 INFO L480 AbstractCegarLoop]: Abstraction has 25073 states and 80040 transitions. [2021-05-03 14:03:02,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 25073 states and 80040 transitions. [2021-05-03 14:03:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:02,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:02,972 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:03,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:03,173 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:03,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1409104131, now seen corresponding path program 443 times [2021-05-03 14:03:03,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:03,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247778164] [2021-05-03 14:03:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247778164] [2021-05-03 14:03:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90404495] [2021-05-03 14:03:03,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:03,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:03:03,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:04,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:04,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2021-05-03 14:03:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56038866] [2021-05-03 14:03:04,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:04,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:04,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:04,646 INFO L87 Difference]: Start difference. First operand 25073 states and 80040 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:06,813 INFO L93 Difference]: Finished difference Result 25700 states and 81360 transitions. [2021-05-03 14:03:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:06,858 INFO L225 Difference]: With dead ends: 25700 [2021-05-03 14:03:06,859 INFO L226 Difference]: Without dead ends: 25682 [2021-05-03 14:03:06,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1596.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25682 states. [2021-05-03 14:03:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25682 to 24970. [2021-05-03 14:03:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24970 states, 24969 states have (on average 3.1887140053666547) internal successors, (79619), 24969 states have internal predecessors, (79619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24970 states to 24970 states and 79619 transitions. [2021-05-03 14:03:07,468 INFO L78 Accepts]: Start accepts. Automaton has 24970 states and 79619 transitions. Word has length 25 [2021-05-03 14:03:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:07,469 INFO L480 AbstractCegarLoop]: Abstraction has 24970 states and 79619 transitions. [2021-05-03 14:03:07,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24970 states and 79619 transitions. [2021-05-03 14:03:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:07,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:07,515 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:07,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-05-03 14:03:07,729 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -670189697, now seen corresponding path program 444 times [2021-05-03 14:03:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:07,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671043639] [2021-05-03 14:03:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671043639] [2021-05-03 14:03:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798087998] [2021-05-03 14:03:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:08,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:03:08,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:09,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-05-03 14:03:09,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197783386] [2021-05-03 14:03:09,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:09,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:09,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:09,435 INFO L87 Difference]: Start difference. First operand 24970 states and 79619 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:11,504 INFO L93 Difference]: Finished difference Result 25480 states and 80657 transitions. [2021-05-03 14:03:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:03:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:11,544 INFO L225 Difference]: With dead ends: 25480 [2021-05-03 14:03:11,544 INFO L226 Difference]: Without dead ends: 25458 [2021-05-03 14:03:11,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1894.3ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25458 states. [2021-05-03 14:03:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25458 to 24939. [2021-05-03 14:03:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-05-03 14:03:12,063 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-05-03 14:03:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:12,063 INFO L480 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-05-03 14:03:12,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-05-03 14:03:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:12,098 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:12,098 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:12,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-05-03 14:03:12,298 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:12,298 INFO L82 PathProgramCache]: Analyzing trace with hash -703788925, now seen corresponding path program 445 times [2021-05-03 14:03:12,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:12,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168627580] [2021-05-03 14:03:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:12,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168627580] [2021-05-03 14:03:12,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815128579] [2021-05-03 14:03:12,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:13,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:13,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 22 [2021-05-03 14:03:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538752774] [2021-05-03 14:03:13,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:13,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:13,751 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:15,130 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-03 14:03:15,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:15,744 INFO L93 Difference]: Finished difference Result 25309 states and 80217 transitions. [2021-05-03 14:03:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:16,024 INFO L225 Difference]: With dead ends: 25309 [2021-05-03 14:03:16,025 INFO L226 Difference]: Without dead ends: 25302 [2021-05-03 14:03:16,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:03:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25302 states. [2021-05-03 14:03:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25302 to 24939. [2021-05-03 14:03:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 24938 states have (on average 3.1885876974897744) internal successors, (79517), 24938 states have internal predecessors, (79517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 79517 transitions. [2021-05-03 14:03:16,718 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 79517 transitions. Word has length 25 [2021-05-03 14:03:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:16,718 INFO L480 AbstractCegarLoop]: Abstraction has 24939 states and 79517 transitions. [2021-05-03 14:03:16,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 79517 transitions. [2021-05-03 14:03:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:16,757 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:16,757 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:16,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:16,973 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash 323843797, now seen corresponding path program 446 times [2021-05-03 14:03:16,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:16,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632300845] [2021-05-03 14:03:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:17,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632300845] [2021-05-03 14:03:17,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558593013] [2021-05-03 14:03:17,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:17,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:17,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:19,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:19,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-05-03 14:03:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379514244] [2021-05-03 14:03:19,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:19,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:19,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:19,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:19,185 INFO L87 Difference]: Start difference. First operand 24939 states and 79517 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:20,950 INFO L93 Difference]: Finished difference Result 25226 states and 80018 transitions. [2021-05-03 14:03:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:21,026 INFO L225 Difference]: With dead ends: 25226 [2021-05-03 14:03:21,026 INFO L226 Difference]: Without dead ends: 25213 [2021-05-03 14:03:21,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 2138.3ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:03:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25213 states. [2021-05-03 14:03:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25213 to 24914. [2021-05-03 14:03:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24914 states, 24913 states have (on average 3.1877333119255007) internal successors, (79416), 24913 states have internal predecessors, (79416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24914 states to 24914 states and 79416 transitions. [2021-05-03 14:03:21,731 INFO L78 Accepts]: Start accepts. Automaton has 24914 states and 79416 transitions. Word has length 25 [2021-05-03 14:03:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:21,731 INFO L480 AbstractCegarLoop]: Abstraction has 24914 states and 79416 transitions. [2021-05-03 14:03:21,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24914 states and 79416 transitions. [2021-05-03 14:03:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:21,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:21,774 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:21,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:21,996 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash -895253061, now seen corresponding path program 447 times [2021-05-03 14:03:21,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:21,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482945740] [2021-05-03 14:03:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:22,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482945740] [2021-05-03 14:03:22,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541009892] [2021-05-03 14:03:22,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:22,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:03:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:23,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:23,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-05-03 14:03:23,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804105910] [2021-05-03 14:03:23,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:23,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:23,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:23,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:23,665 INFO L87 Difference]: Start difference. First operand 24914 states and 79416 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:25,340 INFO L93 Difference]: Finished difference Result 26019 states and 82469 transitions. [2021-05-03 14:03:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:03:25,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:25,453 INFO L225 Difference]: With dead ends: 26019 [2021-05-03 14:03:25,453 INFO L226 Difference]: Without dead ends: 26002 [2021-05-03 14:03:25,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1735.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26002 states. [2021-05-03 14:03:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26002 to 25397. [2021-05-03 14:03:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25397 states, 25396 states have (on average 3.193416286029296) internal successors, (81100), 25396 states have internal predecessors, (81100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25397 states to 25397 states and 81100 transitions. [2021-05-03 14:03:25,881 INFO L78 Accepts]: Start accepts. Automaton has 25397 states and 81100 transitions. Word has length 25 [2021-05-03 14:03:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:25,881 INFO L480 AbstractCegarLoop]: Abstraction has 25397 states and 81100 transitions. [2021-05-03 14:03:25,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25397 states and 81100 transitions. [2021-05-03 14:03:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:25,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:25,909 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:26,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable772 [2021-05-03 14:03:26,109 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash 719449663, now seen corresponding path program 448 times [2021-05-03 14:03:26,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:26,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505863370] [2021-05-03 14:03:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505863370] [2021-05-03 14:03:26,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805910648] [2021-05-03 14:03:26,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:26,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:27,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:27,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-05-03 14:03:27,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675100979] [2021-05-03 14:03:27,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:27,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:27,680 INFO L87 Difference]: Start difference. First operand 25397 states and 81100 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:30,010 INFO L93 Difference]: Finished difference Result 26023 states and 82394 transitions. [2021-05-03 14:03:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:03:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:30,063 INFO L225 Difference]: With dead ends: 26023 [2021-05-03 14:03:30,063 INFO L226 Difference]: Without dead ends: 26005 [2021-05-03 14:03:30,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1736.6ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2021-05-03 14:03:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 25282. [2021-05-03 14:03:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25282 states, 25281 states have (on average 3.189628574819034) internal successors, (80637), 25281 states have internal predecessors, (80637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25282 states to 25282 states and 80637 transitions. [2021-05-03 14:03:30,661 INFO L78 Accepts]: Start accepts. Automaton has 25282 states and 80637 transitions. Word has length 25 [2021-05-03 14:03:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:30,661 INFO L480 AbstractCegarLoop]: Abstraction has 25282 states and 80637 transitions. [2021-05-03 14:03:30,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 25282 states and 80637 transitions. [2021-05-03 14:03:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:30,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:30,874 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:31,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable775 [2021-05-03 14:03:31,089 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1359844165, now seen corresponding path program 449 times [2021-05-03 14:03:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:31,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114666145] [2021-05-03 14:03:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114666145] [2021-05-03 14:03:31,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082073196] [2021-05-03 14:03:31,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:31,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:03:31,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:31,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:32,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:32,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-05-03 14:03:32,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487739823] [2021-05-03 14:03:32,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:32,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:32,871 INFO L87 Difference]: Start difference. First operand 25282 states and 80637 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:34,972 INFO L93 Difference]: Finished difference Result 25873 states and 81826 transitions. [2021-05-03 14:03:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:34,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:35,023 INFO L225 Difference]: With dead ends: 25873 [2021-05-03 14:03:35,023 INFO L226 Difference]: Without dead ends: 25851 [2021-05-03 14:03:35,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1956.0ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25851 states. [2021-05-03 14:03:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25851 to 25224. [2021-05-03 14:03:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25224 states, 25223 states have (on average 3.1875669032232485) internal successors, (80400), 25223 states have internal predecessors, (80400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25224 states to 25224 states and 80400 transitions. [2021-05-03 14:03:35,501 INFO L78 Accepts]: Start accepts. Automaton has 25224 states and 80400 transitions. Word has length 25 [2021-05-03 14:03:35,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:35,501 INFO L480 AbstractCegarLoop]: Abstraction has 25224 states and 80400 transitions. [2021-05-03 14:03:35,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:35,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25224 states and 80400 transitions. [2021-05-03 14:03:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:35,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:35,534 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:35,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-05-03 14:03:35,734 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1393443393, now seen corresponding path program 450 times [2021-05-03 14:03:35,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:35,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702208493] [2021-05-03 14:03:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:36,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702208493] [2021-05-03 14:03:36,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683241594] [2021-05-03 14:03:36,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:36,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:03:36,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:37,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:37,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-05-03 14:03:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390245704] [2021-05-03 14:03:37,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:37,244 INFO L87 Difference]: Start difference. First operand 25224 states and 80400 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:39,575 INFO L93 Difference]: Finished difference Result 25707 states and 81351 transitions. [2021-05-03 14:03:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:03:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:39,626 INFO L225 Difference]: With dead ends: 25707 [2021-05-03 14:03:39,627 INFO L226 Difference]: Without dead ends: 25681 [2021-05-03 14:03:39,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1735.5ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:03:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2021-05-03 14:03:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 25191. [2021-05-03 14:03:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-05-03 14:03:40,149 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-05-03 14:03:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:40,149 INFO L480 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-05-03 14:03:40,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-05-03 14:03:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:40,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:40,182 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:40,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:40,383 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1859947835, now seen corresponding path program 451 times [2021-05-03 14:03:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:40,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589391068] [2021-05-03 14:03:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:40,572 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-03 14:03:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589391068] [2021-05-03 14:03:41,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704592690] [2021-05-03 14:03:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:41,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:41,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-05-03 14:03:41,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311695438] [2021-05-03 14:03:41,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:41,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:41,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:41,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:41,952 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:44,062 INFO L93 Difference]: Finished difference Result 25528 states and 80917 transitions. [2021-05-03 14:03:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:44,108 INFO L225 Difference]: With dead ends: 25528 [2021-05-03 14:03:44,108 INFO L226 Difference]: Without dead ends: 25521 [2021-05-03 14:03:44,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1672.5ms TimeCoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-05-03 14:03:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 25191. [2021-05-03 14:03:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25191 states, 25190 states have (on average 3.1873362445414846) internal successors, (80289), 25190 states have internal predecessors, (80289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25191 states to 25191 states and 80289 transitions. [2021-05-03 14:03:44,710 INFO L78 Accepts]: Start accepts. Automaton has 25191 states and 80289 transitions. Word has length 25 [2021-05-03 14:03:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 25191 states and 80289 transitions. [2021-05-03 14:03:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25191 states and 80289 transitions. [2021-05-03 14:03:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:44,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:44,746 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:44,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-05-03 14:03:44,946 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash 519987609, now seen corresponding path program 452 times [2021-05-03 14:03:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:44,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169637665] [2021-05-03 14:03:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169637665] [2021-05-03 14:03:45,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502187530] [2021-05-03 14:03:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:45,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:03:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:03:47,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:47,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2021-05-03 14:03:47,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906055795] [2021-05-03 14:03:47,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:03:47,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:47,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:03:47,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:03:47,040 INFO L87 Difference]: Start difference. First operand 25191 states and 80289 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:48,611 INFO L93 Difference]: Finished difference Result 25433 states and 80707 transitions. [2021-05-03 14:03:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:03:48,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:48,676 INFO L225 Difference]: With dead ends: 25433 [2021-05-03 14:03:48,676 INFO L226 Difference]: Without dead ends: 25420 [2021-05-03 14:03:48,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1987.4ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:03:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25420 states. [2021-05-03 14:03:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25420 to 25149. [2021-05-03 14:03:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 25148 states have (on average 3.185819945920153) internal successors, (80117), 25148 states have internal predecessors, (80117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 80117 transitions. [2021-05-03 14:03:49,322 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 80117 transitions. Word has length 25 [2021-05-03 14:03:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:49,322 INFO L480 AbstractCegarLoop]: Abstraction has 25149 states and 80117 transitions. [2021-05-03 14:03:49,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 80117 transitions. [2021-05-03 14:03:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:49,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:49,361 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:49,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:49,573 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:49,573 INFO L82 PathProgramCache]: Analyzing trace with hash -799705089, now seen corresponding path program 453 times [2021-05-03 14:03:49,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:49,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010941470] [2021-05-03 14:03:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:49,799 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-03 14:03:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:50,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010941470] [2021-05-03 14:03:50,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610373842] [2021-05-03 14:03:50,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:50,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:03:50,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:51,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:51,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-05-03 14:03:51,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079755599] [2021-05-03 14:03:51,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:51,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:51,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:51,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:51,563 INFO L87 Difference]: Start difference. First operand 25149 states and 80117 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:54,224 INFO L93 Difference]: Finished difference Result 26300 states and 83236 transitions. [2021-05-03 14:03:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:54,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:54,300 INFO L225 Difference]: With dead ends: 26300 [2021-05-03 14:03:54,300 INFO L226 Difference]: Without dead ends: 26283 [2021-05-03 14:03:54,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2165.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26283 states. [2021-05-03 14:03:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26283 to 25645. [2021-05-03 14:03:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25645 states, 25644 states have (on average 3.1899469661519264) internal successors, (81803), 25644 states have internal predecessors, (81803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25645 states to 25645 states and 81803 transitions. [2021-05-03 14:03:55,016 INFO L78 Accepts]: Start accepts. Automaton has 25645 states and 81803 transitions. Word has length 25 [2021-05-03 14:03:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:55,017 INFO L480 AbstractCegarLoop]: Abstraction has 25645 states and 81803 transitions. [2021-05-03 14:03:55,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 25645 states and 81803 transitions. [2021-05-03 14:03:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:03:55,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:55,066 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:55,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:55,279 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:55,279 INFO L82 PathProgramCache]: Analyzing trace with hash 814997635, now seen corresponding path program 454 times [2021-05-03 14:03:55,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:55,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076001912] [2021-05-03 14:03:55,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:56,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076001912] [2021-05-03 14:03:56,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054500096] [2021-05-03 14:03:56,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:56,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:03:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:03:57,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:57,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-05-03 14:03:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3632587] [2021-05-03 14:03:57,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:03:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:03:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:03:57,425 INFO L87 Difference]: Start difference. First operand 25645 states and 81803 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:59,902 INFO L93 Difference]: Finished difference Result 26302 states and 83129 transitions. [2021-05-03 14:03:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:03:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:03:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:59,972 INFO L225 Difference]: With dead ends: 26302 [2021-05-03 14:03:59,972 INFO L226 Difference]: Without dead ends: 26284 [2021-05-03 14:03:59,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2250.2ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:03:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26284 states. [2021-05-03 14:04:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26284 to 25519. [2021-05-03 14:04:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 25518 states have (on average 3.186966063171095) internal successors, (81325), 25518 states have internal predecessors, (81325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 81325 transitions. [2021-05-03 14:04:00,623 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 81325 transitions. Word has length 25 [2021-05-03 14:04:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:00,623 INFO L480 AbstractCegarLoop]: Abstraction has 25519 states and 81325 transitions. [2021-05-03 14:04:00,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 81325 transitions. [2021-05-03 14:04:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:04:00,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:00,659 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:00,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-05-03 14:04:00,860 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:00,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1264296193, now seen corresponding path program 455 times [2021-05-03 14:04:00,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:00,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833888272] [2021-05-03 14:04:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:01,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833888272] [2021-05-03 14:04:01,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023482513] [2021-05-03 14:04:01,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:01,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:04:01,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:01,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:04:01,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:02,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:02,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-05-03 14:04:02,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746847767] [2021-05-03 14:04:02,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:04:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:04:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:02,531 INFO L87 Difference]: Start difference. First operand 25519 states and 81325 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:04,743 INFO L93 Difference]: Finished difference Result 26169 states and 82620 transitions. [2021-05-03 14:04:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:04:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:04,792 INFO L225 Difference]: With dead ends: 26169 [2021-05-03 14:04:04,792 INFO L226 Difference]: Without dead ends: 26147 [2021-05-03 14:04:04,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1781.2ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:04:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26147 states. [2021-05-03 14:04:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26147 to 25469. [2021-05-03 14:04:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25469 states, 25468 states have (on average 3.1853698759227265) internal successors, (81125), 25468 states have internal predecessors, (81125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25469 states to 25469 states and 81125 transitions. [2021-05-03 14:04:05,330 INFO L78 Accepts]: Start accepts. Automaton has 25469 states and 81125 transitions. Word has length 25 [2021-05-03 14:04:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:05,330 INFO L480 AbstractCegarLoop]: Abstraction has 25469 states and 81125 transitions. [2021-05-03 14:04:05,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 25469 states and 81125 transitions. [2021-05-03 14:04:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:04:05,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:05,366 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:05,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable796,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:05,567 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1297895421, now seen corresponding path program 456 times [2021-05-03 14:04:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:05,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879299888] [2021-05-03 14:04:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:06,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879299888] [2021-05-03 14:04:06,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822101134] [2021-05-03 14:04:06,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:06,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:06,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:04:06,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:07,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:07,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-05-03 14:04:07,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916915685] [2021-05-03 14:04:07,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:04:07,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:04:07,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:07,224 INFO L87 Difference]: Start difference. First operand 25469 states and 81125 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:09,558 INFO L93 Difference]: Finished difference Result 26109 states and 82367 transitions. [2021-05-03 14:04:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:04:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:04:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:09,600 INFO L225 Difference]: With dead ends: 26109 [2021-05-03 14:04:09,600 INFO L226 Difference]: Without dead ends: 26083 [2021-05-03 14:04:09,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1836.1ms TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:04:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26083 states. [2021-05-03 14:04:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26083 to 25423. [2021-05-03 14:04:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25423 states, 25422 states have (on average 3.1845645503894264) internal successors, (80958), 25422 states have internal predecessors, (80958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25423 states to 25423 states and 80958 transitions. [2021-05-03 14:04:10,187 INFO L78 Accepts]: Start accepts. Automaton has 25423 states and 80958 transitions. Word has length 25 [2021-05-03 14:04:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:10,187 INFO L480 AbstractCegarLoop]: Abstraction has 25423 states and 80958 transitions. [2021-05-03 14:04:10,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 25423 states and 80958 transitions. [2021-05-03 14:04:10,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:04:10,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:10,216 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:10,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:10,416 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1955495807, now seen corresponding path program 457 times [2021-05-03 14:04:10,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:10,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560915228] [2021-05-03 14:04:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:11,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560915228] [2021-05-03 14:04:11,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323327533] [2021-05-03 14:04:11,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:04:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:11,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:11,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-05-03 14:04:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994113861] [2021-05-03 14:04:11,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:04:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:04:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:11,864 INFO L87 Difference]: Start difference. First operand 25423 states and 80958 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:14,109 INFO L93 Difference]: Finished difference Result 25930 states and 81933 transitions. [2021-05-03 14:04:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 14:04:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:14,151 INFO L225 Difference]: With dead ends: 25930 [2021-05-03 14:04:14,151 INFO L226 Difference]: Without dead ends: 25900 [2021-05-03 14:04:14,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1748.9ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:04:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-05-03 14:04:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 25388. [2021-05-03 14:04:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25388 states, 25387 states have (on average 3.184425099460354) internal successors, (80843), 25387 states have internal predecessors, (80843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25388 states to 25388 states and 80843 transitions. [2021-05-03 14:04:14,676 INFO L78 Accepts]: Start accepts. Automaton has 25388 states and 80843 transitions. Word has length 25 [2021-05-03 14:04:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:14,676 INFO L480 AbstractCegarLoop]: Abstraction has 25388 states and 80843 transitions. [2021-05-03 14:04:14,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 25388 states and 80843 transitions. [2021-05-03 14:04:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:04:14,704 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:14,704 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:14,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-05-03 14:04:14,905 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash -268591229, now seen corresponding path program 458 times [2021-05-03 14:04:14,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:14,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448045639] [2021-05-03 14:04:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:15,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448045639] [2021-05-03 14:04:15,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198046915] [2021-05-03 14:04:15,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:15,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-03 14:04:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:16,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-05-03 14:04:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157767231] [2021-05-03 14:04:16,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:04:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:04:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:16,446 INFO L87 Difference]: Start difference. First operand 25388 states and 80843 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-05-03 14:04:18,041 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-05-03 14:04:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:18,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:18,242 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:04:18,246 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:04:18,246 INFO L202 PluginConnector]: Adding new model fibonacci.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:04:18 BasicIcfg [2021-05-03 14:04:18,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:04:18,247 INFO L168 Benchmark]: Toolchain (without parser) took 873490.16 ms. Allocated memory was 348.1 MB in the beginning and 5.4 GB in the end (delta: 5.1 GB). Free memory was 328.0 MB in the beginning and 3.2 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.0 GB. [2021-05-03 14:04:18,247 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 348.1 MB. Free memory was 329.1 MB in the beginning and 329.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:04:18,247 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.33 ms. Allocated memory is still 348.1 MB. Free memory was 327.9 MB in the beginning and 326.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:04:18,247 INFO L168 Benchmark]: Boogie Preprocessor took 14.99 ms. Allocated memory is still 348.1 MB. Free memory was 326.5 MB in the beginning and 325.5 MB in the end (delta: 913.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:04:18,247 INFO L168 Benchmark]: RCFGBuilder took 273.78 ms. Allocated memory is still 348.1 MB. Free memory was 325.5 MB in the beginning and 311.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 14:04:18,247 INFO L168 Benchmark]: TraceAbstraction took 873171.35 ms. Allocated memory was 348.1 MB in the beginning and 5.4 GB in the end (delta: 5.1 GB). Free memory was 310.9 MB in the beginning and 3.2 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.0 GB. [2021-05-03 14:04:18,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 348.1 MB. Free memory was 329.1 MB in the beginning and 329.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.33 ms. Allocated memory is still 348.1 MB. Free memory was 327.9 MB in the beginning and 326.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.99 ms. Allocated memory is still 348.1 MB. Free memory was 326.5 MB in the beginning and 325.5 MB in the end (delta: 913.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 273.78 ms. Allocated memory is still 348.1 MB. Free memory was 325.5 MB in the beginning and 311.4 MB in the end (delta: 14.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 873171.35 ms. Allocated memory was 348.1 MB in the beginning and 5.4 GB in the end (delta: 5.1 GB). Free memory was 310.9 MB in the beginning and 3.2 GB in the end (delta: -2.9 GB). Peak memory consumption was 2.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 64). Cancelled while BasicCegarLoop was constructing difference of abstraction (25388states) and FLOYD_HOARE automaton (currently 18 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 18 for 41ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 873084.6ms, OverallIterations: 472, TraceHistogramMax: 6, EmptinessCheckTime: 4950.0ms, AutomataDifference: 494640.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21143 SDtfs, 65069 SDslu, 182708 SDs, 0 SdLazy, 155431 SolverSat, 12977 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79402.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26447 GetRequests, 7036 SyntacticMatches, 614 SemanticMatches, 18796 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298883 ImplicationChecksByTransitivity, 438049.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25645occurred in iteration=467, InterpolantAutomatonStates: 15855, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 60521.7ms AutomataMinimizationTime, 471 MinimizatonAttempts, 345261 StatesRemovedByMinimization, 469 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1811.9ms SsaConstructionTime, 5530.5ms SatisfiabilityAnalysisTime, 204208.7ms InterpolantComputationTime, 19856 NumberOfCodeBlocks, 19856 NumberOfCodeBlocksAsserted, 1753 NumberOfCheckSat, 18923 ConstructedInterpolants, 0 QuantifiedInterpolants, 127681 SizeOfPredicates, 1258 NumberOfNonLiveVariables, 41765 ConjunctsInSsa, 9856 ConjunctsInUnsatCore, 933 InterpolantComputations, 11 PerfectInterpolantSequences, 6527/21775 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown