/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/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:15:09,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:15:09,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:15:10,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:15:10,057 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 [2021-04-15 02:15:10,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:15:10,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:15:10,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:15:10,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:15:10,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:15:10,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:15:10,079 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:15:10,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:15:10,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:15:10,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:15:10,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:15:10,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:15:10,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:15:10,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:15:10,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:15:10,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:15:10,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:15:10,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:15:10,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:15:10,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:15:10,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:15:10,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:15:10,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:15:10,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:15:10,084 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:15:10,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:15:10,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:15:10,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:15:10,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:15:10,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:15:10,476 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:15:10,478 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:15:10,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-04-15 02:15:10,480 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-04-15 02:15:10,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:15:10,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:15:10,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:15:10,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:15:10,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:15:10,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:15:10,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:15:10,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:15:10,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:15:10,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/1) ... [2021-04-15 02:15:10,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:15:10,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:15:10,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:15:10,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:15:10,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (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 [2021-04-15 02:15:10,645 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:15:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:15:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:15:10,646 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:15:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:15:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:15:10,646 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:15:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:15:10,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:15:10,647 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 02:15:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 02:15:10,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 02:15:10,648 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:15:10,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:15:10,930 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:15:10,931 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:15:10 BoogieIcfgContainer [2021-04-15 02:15:10,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:15:10,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:15:10,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:15:10,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:15:10,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:15:10" (1/2) ... [2021-04-15 02:15:10,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c1796f and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:15:10, skipping insertion in model container [2021-04-15 02:15:10,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:15:10" (2/2) ... [2021-04-15 02:15:10,939 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-04-15 02:15:10,956 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:15:10,957 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:15:10,960 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:15:10,961 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:15:11,040 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 02:15:11,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 02:15:11,105 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:15:11,105 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:15:11,106 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:15:11,106 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:15:11,106 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:15:11,106 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:15:11,106 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:15:11,106 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:15:11,115 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-04-15 02:15:11,158 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:11,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:15:11,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:11,209 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:11,209 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:11,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:11,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1660799360, now seen corresponding path program 1 times [2021-04-15 02:15:11,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:11,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867881246] [2021-04-15 02:15:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:11,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867881246] [2021-04-15 02:15:11,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:11,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:15:11,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393562121] [2021-04-15 02:15:11,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:15:11,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:11,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:15:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:15:11,533 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:11,567 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-04-15 02:15:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:15:11,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:11,581 INFO L225 Difference]: With dead ends: 214 [2021-04-15 02:15:11,581 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 02:15:11,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:15:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 02:15:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-04-15 02:15:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-04-15 02:15:11,640 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-04-15 02:15:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:11,641 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-04-15 02:15:11,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-04-15 02:15:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:11,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:11,644 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:11,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:15:11,644 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 185723234, now seen corresponding path program 1 times [2021-04-15 02:15:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:11,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884833784] [2021-04-15 02:15:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884833784] [2021-04-15 02:15:11,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720883778] [2021-04-15 02:15:11,709 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 [2021-04-15 02:15:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:11,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:15:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:11,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:11,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-04-15 02:15:11,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509508666] [2021-04-15 02:15:11,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:15:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:11,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:15:11,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:15:11,920 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-04-15 02:15:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:12,100 INFO L93 Difference]: Finished difference Result 336 states and 940 transitions. [2021-04-15 02:15:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:15:12,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 [2021-04-15 02:15:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:12,108 INFO L225 Difference]: With dead ends: 336 [2021-04-15 02:15:12,108 INFO L226 Difference]: Without dead ends: 336 [2021-04-15 02:15:12,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-04-15 02:15:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 173. [2021-04-15 02:15:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-04-15 02:15:12,146 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-04-15 02:15:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:12,147 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-04-15 02:15:12,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-04-15 02:15:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-04-15 02:15:12,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:12,154 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:12,155 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:12,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:15:12,382 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-04-15 02:15:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:12,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48827666] [2021-04-15 02:15:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48827666] [2021-04-15 02:15:12,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:12,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:15:12,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827016238] [2021-04-15 02:15:12,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:15:12,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:15:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:15:12,489 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:12,537 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-04-15 02:15:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:15:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:12,546 INFO L225 Difference]: With dead ends: 283 [2021-04-15 02:15:12,546 INFO L226 Difference]: Without dead ends: 283 [2021-04-15 02:15:12,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-04-15 02:15:12,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-04-15 02:15:12,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-04-15 02:15:12,559 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-04-15 02:15:12,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:12,559 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-04-15 02:15:12,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-04-15 02:15:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:12,565 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:12,565 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:12,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:15:12,566 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-04-15 02:15:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526135793] [2021-04-15 02:15:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:12,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526135793] [2021-04-15 02:15:12,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:12,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:15:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973463129] [2021-04-15 02:15:12,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:15:12,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:15:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:12,630 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:12,677 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-04-15 02:15:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:15:12,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:12,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:12,680 INFO L225 Difference]: With dead ends: 339 [2021-04-15 02:15:12,680 INFO L226 Difference]: Without dead ends: 339 [2021-04-15 02:15:12,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:15:12,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-04-15 02:15:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-04-15 02:15:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-04-15 02:15:12,703 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-04-15 02:15:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:12,703 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-04-15 02:15:12,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-04-15 02:15:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:12,704 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:12,704 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:12,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:15:12,704 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 1 times [2021-04-15 02:15:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:12,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904758757] [2021-04-15 02:15:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:12,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904758757] [2021-04-15 02:15:12,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306103648] [2021-04-15 02:15:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 02:15:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:12,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:12,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-04-15 02:15:12,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113753369] [2021-04-15 02:15:12,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:15:12,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:12,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:15:12,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:12,948 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-04-15 02:15:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:13,305 INFO L93 Difference]: Finished difference Result 415 states and 1153 transitions. [2021-04-15 02:15:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:15:13,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17 [2021-04-15 02:15:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:13,309 INFO L225 Difference]: With dead ends: 415 [2021-04-15 02:15:13,309 INFO L226 Difference]: Without dead ends: 415 [2021-04-15 02:15:13,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:15:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-04-15 02:15:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 166. [2021-04-15 02:15:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.993939393939394) internal successors, (494), 165 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 494 transitions. [2021-04-15 02:15:13,323 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 494 transitions. Word has length 17 [2021-04-15 02:15:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:13,323 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 494 transitions. [2021-04-15 02:15:13,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-04-15 02:15:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 494 transitions. [2021-04-15 02:15:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:13,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:13,324 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:13,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:13,549 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:13,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-04-15 02:15:13,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:13,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679895015] [2021-04-15 02:15:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:13,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679895015] [2021-04-15 02:15:13,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:13,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:15:13,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066625803] [2021-04-15 02:15:13,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:15:13,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:15:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:13,602 INFO L87 Difference]: Start difference. First operand 166 states and 494 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:13,686 INFO L93 Difference]: Finished difference Result 286 states and 791 transitions. [2021-04-15 02:15:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:15:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:13,688 INFO L225 Difference]: With dead ends: 286 [2021-04-15 02:15:13,688 INFO L226 Difference]: Without dead ends: 282 [2021-04-15 02:15:13,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:15:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-04-15 02:15:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 174. [2021-04-15 02:15:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.9364161849710984) internal successors, (508), 173 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 508 transitions. [2021-04-15 02:15:13,696 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 508 transitions. Word has length 17 [2021-04-15 02:15:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:13,696 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 508 transitions. [2021-04-15 02:15:13,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 508 transitions. [2021-04-15 02:15:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:13,697 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:13,697 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:13,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:15:13,697 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash 387521758, now seen corresponding path program 2 times [2021-04-15 02:15:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:13,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039639616] [2021-04-15 02:15:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:13,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039639616] [2021-04-15 02:15:13,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:13,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:15:13,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617207093] [2021-04-15 02:15:13,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:15:13,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:15:13,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:13,733 INFO L87 Difference]: Start difference. First operand 174 states and 508 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:13,823 INFO L93 Difference]: Finished difference Result 257 states and 709 transitions. [2021-04-15 02:15:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:15:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:13,825 INFO L225 Difference]: With dead ends: 257 [2021-04-15 02:15:13,825 INFO L226 Difference]: Without dead ends: 246 [2021-04-15 02:15:13,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-04-15 02:15:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 191. [2021-04-15 02:15:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-04-15 02:15:13,832 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-04-15 02:15:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:13,833 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-04-15 02:15:13,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-04-15 02:15:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:13,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:13,834 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:13,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 02:15:13,834 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 3 times [2021-04-15 02:15:13,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:13,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847601796] [2021-04-15 02:15:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847601796] [2021-04-15 02:15:13,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661013659] [2021-04-15 02:15:13,882 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 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 [2021-04-15 02:15:13,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:15:13,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:14,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:14,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:14,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546838590] [2021-04-15 02:15:14,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:14,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:14,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:14,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:14,033 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 02:15:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:14,254 INFO L93 Difference]: Finished difference Result 405 states and 1109 transitions. [2021-04-15 02:15:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:15:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17 [2021-04-15 02:15:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:14,256 INFO L225 Difference]: With dead ends: 405 [2021-04-15 02:15:14,256 INFO L226 Difference]: Without dead ends: 405 [2021-04-15 02:15:14,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:15:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-04-15 02:15:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 172. [2021-04-15 02:15:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.9064327485380117) internal successors, (497), 171 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 497 transitions. [2021-04-15 02:15:14,265 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 497 transitions. Word has length 17 [2021-04-15 02:15:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:14,265 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 497 transitions. [2021-04-15 02:15:14,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 02:15:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 497 transitions. [2021-04-15 02:15:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:14,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:14,266 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:14,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:14,488 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:14,489 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 4 times [2021-04-15 02:15:14,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:14,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355326338] [2021-04-15 02:15:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:14,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355326338] [2021-04-15 02:15:14,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695685008] [2021-04-15 02:15:14,557 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:14,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:14,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:14,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:14,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:14,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166360806] [2021-04-15 02:15:14,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:14,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:14,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:14,703 INFO L87 Difference]: Start difference. First operand 172 states and 497 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 02:15:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:14,935 INFO L93 Difference]: Finished difference Result 369 states and 1041 transitions. [2021-04-15 02:15:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:15:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17 [2021-04-15 02:15:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:14,938 INFO L225 Difference]: With dead ends: 369 [2021-04-15 02:15:14,938 INFO L226 Difference]: Without dead ends: 369 [2021-04-15 02:15:14,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-04-15 02:15:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 178. [2021-04-15 02:15:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-04-15 02:15:14,946 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-04-15 02:15:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:14,946 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-04-15 02:15:14,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 02:15:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-04-15 02:15:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:14,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:14,949 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:15,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:15,173 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash 374191714, now seen corresponding path program 2 times [2021-04-15 02:15:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:15,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602355178] [2021-04-15 02:15:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:15,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602355178] [2021-04-15 02:15:15,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:15,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:15:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921153446] [2021-04-15 02:15:15,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:15:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:15:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:15:15,207 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:15,245 INFO L93 Difference]: Finished difference Result 295 states and 822 transitions. [2021-04-15 02:15:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:15:15,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:15,247 INFO L225 Difference]: With dead ends: 295 [2021-04-15 02:15:15,247 INFO L226 Difference]: Without dead ends: 287 [2021-04-15 02:15:15,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-04-15 02:15:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 161. [2021-04-15 02:15:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9125) internal successors, (466), 160 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 466 transitions. [2021-04-15 02:15:15,254 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 466 transitions. Word has length 17 [2021-04-15 02:15:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:15,255 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 466 transitions. [2021-04-15 02:15:15,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 466 transitions. [2021-04-15 02:15:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:15,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:15,256 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:15,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 02:15:15,256 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:15,257 INFO L82 PathProgramCache]: Analyzing trace with hash -814879334, now seen corresponding path program 5 times [2021-04-15 02:15:15,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:15,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852566349] [2021-04-15 02:15:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:15,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852566349] [2021-04-15 02:15:15,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:15,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:15:15,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050308599] [2021-04-15 02:15:15,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:15:15,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:15:15,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:15,304 INFO L87 Difference]: Start difference. First operand 161 states and 466 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:15,386 INFO L93 Difference]: Finished difference Result 290 states and 794 transitions. [2021-04-15 02:15:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:15:15,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:15,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:15,389 INFO L225 Difference]: With dead ends: 290 [2021-04-15 02:15:15,389 INFO L226 Difference]: Without dead ends: 279 [2021-04-15 02:15:15,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-04-15 02:15:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 188. [2021-04-15 02:15:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.871657754010695) internal successors, (537), 187 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 537 transitions. [2021-04-15 02:15:15,395 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 537 transitions. Word has length 17 [2021-04-15 02:15:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:15,396 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 537 transitions. [2021-04-15 02:15:15,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 537 transitions. [2021-04-15 02:15:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:15:15,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:15,397 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:15,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 02:15:15,397 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash 289715358, now seen corresponding path program 6 times [2021-04-15 02:15:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:15,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552417834] [2021-04-15 02:15:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:15,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552417834] [2021-04-15 02:15:15,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:15:15,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 02:15:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979986675] [2021-04-15 02:15:15,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:15:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:15:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:15:15,448 INFO L87 Difference]: Start difference. First operand 188 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:15,535 INFO L93 Difference]: Finished difference Result 250 states and 711 transitions. [2021-04-15 02:15:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:15:15,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:15,537 INFO L225 Difference]: With dead ends: 250 [2021-04-15 02:15:15,537 INFO L226 Difference]: Without dead ends: 250 [2021-04-15 02:15:15,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-04-15 02:15:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 168. [2021-04-15 02:15:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-04-15 02:15:15,543 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-04-15 02:15:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-04-15 02:15:15,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-04-15 02:15:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:15:15,544 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:15,545 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:15,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 02:15:15,545 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1201116992, now seen corresponding path program 1 times [2021-04-15 02:15:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202679013] [2021-04-15 02:15:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202679013] [2021-04-15 02:15:15,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103868622] [2021-04-15 02:15:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 02:15:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:15:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:15,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:15,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:15,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378023048] [2021-04-15 02:15:15,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:15,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:15,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:15,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:15,764 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:15,868 INFO L93 Difference]: Finished difference Result 513 states and 1492 transitions. [2021-04-15 02:15:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:15:15,868 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 19 [2021-04-15 02:15:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:15,871 INFO L225 Difference]: With dead ends: 513 [2021-04-15 02:15:15,871 INFO L226 Difference]: Without dead ends: 483 [2021-04-15 02:15:15,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-04-15 02:15:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 260. [2021-04-15 02:15:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.057915057915058) internal successors, (792), 259 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 792 transitions. [2021-04-15 02:15:15,882 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 792 transitions. Word has length 19 [2021-04-15 02:15:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:15,882 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 792 transitions. [2021-04-15 02:15:15,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 792 transitions. [2021-04-15 02:15:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:15:15,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:15,884 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:16,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 02:15:16,097 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:16,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1527049802, now seen corresponding path program 2 times [2021-04-15 02:15:16,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:16,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751748094] [2021-04-15 02:15:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751748094] [2021-04-15 02:15:16,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938723482] [2021-04-15 02:15:16,197 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 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 [2021-04-15 02:15:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:15:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:16,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:16,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:16,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141607683] [2021-04-15 02:15:16,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:16,293 INFO L87 Difference]: Start difference. First operand 260 states and 792 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:16,361 INFO L93 Difference]: Finished difference Result 505 states and 1513 transitions. [2021-04-15 02:15:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:15:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 19 [2021-04-15 02:15:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:16,383 INFO L225 Difference]: With dead ends: 505 [2021-04-15 02:15:16,383 INFO L226 Difference]: Without dead ends: 475 [2021-04-15 02:15:16,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-04-15 02:15:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 319. [2021-04-15 02:15:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0660377358490565) internal successors, (975), 318 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) [2021-04-15 02:15:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 975 transitions. [2021-04-15 02:15:16,396 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 975 transitions. Word has length 19 [2021-04-15 02:15:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:16,397 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 975 transitions. [2021-04-15 02:15:16,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 975 transitions. [2021-04-15 02:15:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:15:16,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:16,401 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:16,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:16,617 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1473040526, now seen corresponding path program 1 times [2021-04-15 02:15:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:16,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117990475] [2021-04-15 02:15:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:16,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117990475] [2021-04-15 02:15:16,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461198716] [2021-04-15 02:15:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 02:15:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:16,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:15:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:16,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:16,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:16,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773745562] [2021-04-15 02:15:16,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:16,836 INFO L87 Difference]: Start difference. First operand 319 states and 975 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:16,924 INFO L93 Difference]: Finished difference Result 670 states and 1991 transitions. [2021-04-15 02:15:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:15:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 19 [2021-04-15 02:15:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:16,929 INFO L225 Difference]: With dead ends: 670 [2021-04-15 02:15:16,929 INFO L226 Difference]: Without dead ends: 640 [2021-04-15 02:15:16,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-04-15 02:15:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 353. [2021-04-15 02:15:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0823863636363638) internal successors, (1085), 352 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1085 transitions. [2021-04-15 02:15:16,947 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1085 transitions. Word has length 19 [2021-04-15 02:15:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:16,948 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1085 transitions. [2021-04-15 02:15:16,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-04-15 02:15:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1085 transitions. [2021-04-15 02:15:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:16,949 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:16,950 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:17,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 02:15:17,165 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -286324446, now seen corresponding path program 3 times [2021-04-15 02:15:17,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:17,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928142475] [2021-04-15 02:15:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:17,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928142475] [2021-04-15 02:15:17,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485341443] [2021-04-15 02:15:17,217 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 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 [2021-04-15 02:15:17,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:15:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:17,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:17,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 02:15:17,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519467451] [2021-04-15 02:15:17,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:15:17,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:15:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:17,362 INFO L87 Difference]: Start difference. First operand 353 states and 1085 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-04-15 02:15:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:17,575 INFO L93 Difference]: Finished difference Result 989 states and 2888 transitions. [2021-04-15 02:15:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:15:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 [2021-04-15 02:15:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:17,583 INFO L225 Difference]: With dead ends: 989 [2021-04-15 02:15:17,583 INFO L226 Difference]: Without dead ends: 989 [2021-04-15 02:15:17,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:15:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-04-15 02:15:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 484. [2021-04-15 02:15:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.240165631469979) internal successors, (1565), 483 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) [2021-04-15 02:15:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1565 transitions. [2021-04-15 02:15:17,614 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1565 transitions. Word has length 21 [2021-04-15 02:15:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:17,614 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1565 transitions. [2021-04-15 02:15:17,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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) [2021-04-15 02:15:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1565 transitions. [2021-04-15 02:15:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:17,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:17,617 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:17,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 02:15:17,832 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:17,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-04-15 02:15:17,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:17,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715547315] [2021-04-15 02:15:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:17,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715547315] [2021-04-15 02:15:17,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484712723] [2021-04-15 02:15:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:18,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:18,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354950242] [2021-04-15 02:15:18,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:18,029 INFO L87 Difference]: Start difference. First operand 484 states and 1565 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:18,530 INFO L93 Difference]: Finished difference Result 1110 states and 3455 transitions. [2021-04-15 02:15:18,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:15:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:18,537 INFO L225 Difference]: With dead ends: 1110 [2021-04-15 02:15:18,537 INFO L226 Difference]: Without dead ends: 1110 [2021-04-15 02:15:18,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:15:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-04-15 02:15:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 602. [2021-04-15 02:15:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2562396006655576) internal successors, (1957), 601 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1957 transitions. [2021-04-15 02:15:18,562 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1957 transitions. Word has length 21 [2021-04-15 02:15:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:18,562 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 1957 transitions. [2021-04-15 02:15:18,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1957 transitions. [2021-04-15 02:15:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:18,564 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:18,564 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:18,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 02:15:18,777 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 4 times [2021-04-15 02:15:18,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:18,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450852485] [2021-04-15 02:15:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:18,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450852485] [2021-04-15 02:15:18,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369933132] [2021-04-15 02:15:18,817 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 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 [2021-04-15 02:15:18,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:18,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:18,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:18,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:18,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578834392] [2021-04-15 02:15:18,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:18,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:18,997 INFO L87 Difference]: Start difference. First operand 602 states and 1957 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:20,155 INFO L93 Difference]: Finished difference Result 1635 states and 4778 transitions. [2021-04-15 02:15:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:15:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:20,163 INFO L225 Difference]: With dead ends: 1635 [2021-04-15 02:15:20,164 INFO L226 Difference]: Without dead ends: 1635 [2021-04-15 02:15:20,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:15:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-04-15 02:15:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 668. [2021-04-15 02:15:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.3013493253373314) internal successors, (2202), 667 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2202 transitions. [2021-04-15 02:15:20,197 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2202 transitions. Word has length 21 [2021-04-15 02:15:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:20,198 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 2202 transitions. [2021-04-15 02:15:20,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2202 transitions. [2021-04-15 02:15:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:20,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:20,200 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:20,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 02:15:20,425 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:20,425 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-04-15 02:15:20,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:20,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000558318] [2021-04-15 02:15:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:20,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000558318] [2021-04-15 02:15:20,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044049231] [2021-04-15 02:15:20,483 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) [2021-04-15 02:15:20,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:20,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:20,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:20,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861654942] [2021-04-15 02:15:20,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:20,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:20,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:20,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:20,644 INFO L87 Difference]: Start difference. First operand 668 states and 2202 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:21,143 INFO L93 Difference]: Finished difference Result 2300 states and 7176 transitions. [2021-04-15 02:15:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:15:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 [2021-04-15 02:15:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:21,156 INFO L225 Difference]: With dead ends: 2300 [2021-04-15 02:15:21,156 INFO L226 Difference]: Without dead ends: 2292 [2021-04-15 02:15:21,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:15:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-04-15 02:15:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 890. [2021-04-15 02:15:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.404949381327334) internal successors, (3027), 889 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3027 transitions. [2021-04-15 02:15:21,204 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3027 transitions. Word has length 21 [2021-04-15 02:15:21,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:21,204 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 3027 transitions. [2021-04-15 02:15:21,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3027 transitions. [2021-04-15 02:15:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:21,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:21,209 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:21,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:21,431 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-04-15 02:15:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:21,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970842259] [2021-04-15 02:15:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970842259] [2021-04-15 02:15:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65983193] [2021-04-15 02:15:21,469 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 [2021-04-15 02:15:21,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:15:21,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:21,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:21,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:21,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:21,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328468716] [2021-04-15 02:15:21,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:21,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:21,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:21,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:21,613 INFO L87 Difference]: Start difference. First operand 890 states and 3027 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:22,037 INFO L93 Difference]: Finished difference Result 2432 states and 7661 transitions. [2021-04-15 02:15:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:15:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:22,049 INFO L225 Difference]: With dead ends: 2432 [2021-04-15 02:15:22,049 INFO L226 Difference]: Without dead ends: 2432 [2021-04-15 02:15:22,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:15:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-04-15 02:15:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 884. [2021-04-15 02:15:22,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.3975084937712343) internal successors, (3000), 883 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3000 transitions. [2021-04-15 02:15:22,097 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3000 transitions. Word has length 21 [2021-04-15 02:15:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:22,097 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 3000 transitions. [2021-04-15 02:15:22,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3000 transitions. [2021-04-15 02:15:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:22,100 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:22,100 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:22,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:22,313 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 5 times [2021-04-15 02:15:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:22,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069469913] [2021-04-15 02:15:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:22,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069469913] [2021-04-15 02:15:22,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070822879] [2021-04-15 02:15:22,369 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 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 [2021-04-15 02:15:22,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:15:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:22,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:22,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:22,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:22,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097338439] [2021-04-15 02:15:22,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:22,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:22,525 INFO L87 Difference]: Start difference. First operand 884 states and 3000 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:23,108 INFO L93 Difference]: Finished difference Result 1719 states and 5149 transitions. [2021-04-15 02:15:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:15:23,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:23,117 INFO L225 Difference]: With dead ends: 1719 [2021-04-15 02:15:23,117 INFO L226 Difference]: Without dead ends: 1698 [2021-04-15 02:15:23,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:15:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-04-15 02:15:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 891. [2021-04-15 02:15:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.385393258426966) internal successors, (3013), 890 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3013 transitions. [2021-04-15 02:15:23,153 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3013 transitions. Word has length 21 [2021-04-15 02:15:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:23,153 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 3013 transitions. [2021-04-15 02:15:23,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3013 transitions. [2021-04-15 02:15:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:23,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:23,157 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:23,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 02:15:23,380 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash 73792162, now seen corresponding path program 6 times [2021-04-15 02:15:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:23,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999005734] [2021-04-15 02:15:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:23,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999005734] [2021-04-15 02:15:23,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894355306] [2021-04-15 02:15:23,420 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 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 [2021-04-15 02:15:23,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:15:23,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:23,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:23,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460960457] [2021-04-15 02:15:23,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:23,582 INFO L87 Difference]: Start difference. First operand 891 states and 3013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:24,005 INFO L93 Difference]: Finished difference Result 1635 states and 4959 transitions. [2021-04-15 02:15:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:15:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:24,010 INFO L225 Difference]: With dead ends: 1635 [2021-04-15 02:15:24,011 INFO L226 Difference]: Without dead ends: 1585 [2021-04-15 02:15:24,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:15:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-04-15 02:15:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 924. [2021-04-15 02:15:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 3.3575297941495124) internal successors, (3099), 923 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3099 transitions. [2021-04-15 02:15:24,042 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3099 transitions. Word has length 21 [2021-04-15 02:15:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:24,042 INFO L480 AbstractCegarLoop]: Abstraction has 924 states and 3099 transitions. [2021-04-15 02:15:24,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3099 transitions. [2021-04-15 02:15:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:24,045 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:24,045 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:24,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:24,269 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 7 times [2021-04-15 02:15:24,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:24,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904025914] [2021-04-15 02:15:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:24,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904025914] [2021-04-15 02:15:24,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466687782] [2021-04-15 02:15:24,307 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:24,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:24,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:24,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374988244] [2021-04-15 02:15:24,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:24,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:24,447 INFO L87 Difference]: Start difference. First operand 924 states and 3099 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:25,445 INFO L93 Difference]: Finished difference Result 2382 states and 7086 transitions. [2021-04-15 02:15:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 02:15:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:25,454 INFO L225 Difference]: With dead ends: 2382 [2021-04-15 02:15:25,454 INFO L226 Difference]: Without dead ends: 2382 [2021-04-15 02:15:25,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 697.3ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:15:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-04-15 02:15:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1007. [2021-04-15 02:15:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.4025844930417497) internal successors, (3423), 1006 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3423 transitions. [2021-04-15 02:15:25,507 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3423 transitions. Word has length 21 [2021-04-15 02:15:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:25,508 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 3423 transitions. [2021-04-15 02:15:25,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:25,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3423 transitions. [2021-04-15 02:15:25,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:25,511 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:25,511 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:25,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 02:15:25,737 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 8 times [2021-04-15 02:15:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:25,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419988071] [2021-04-15 02:15:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:25,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419988071] [2021-04-15 02:15:25,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898764349] [2021-04-15 02:15:25,788 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 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 [2021-04-15 02:15:25,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:25,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:25,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:25,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556114099] [2021-04-15 02:15:25,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:25,918 INFO L87 Difference]: Start difference. First operand 1007 states and 3423 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:26,471 INFO L93 Difference]: Finished difference Result 1981 states and 5928 transitions. [2021-04-15 02:15:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:15:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:26,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:26,477 INFO L225 Difference]: With dead ends: 1981 [2021-04-15 02:15:26,477 INFO L226 Difference]: Without dead ends: 1953 [2021-04-15 02:15:26,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 387.2ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:15:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-04-15 02:15:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 993. [2021-04-15 02:15:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.403225806451613) internal successors, (3376), 992 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:26,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3376 transitions. [2021-04-15 02:15:26,539 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3376 transitions. Word has length 21 [2021-04-15 02:15:26,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:26,539 INFO L480 AbstractCegarLoop]: Abstraction has 993 states and 3376 transitions. [2021-04-15 02:15:26,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:26,539 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3376 transitions. [2021-04-15 02:15:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:26,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:26,542 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:26,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:26,757 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 9 times [2021-04-15 02:15:26,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:26,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521751614] [2021-04-15 02:15:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521751614] [2021-04-15 02:15:26,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461753477] [2021-04-15 02:15:26,807 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 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 [2021-04-15 02:15:26,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:15:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:26,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:26,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:26,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56034773] [2021-04-15 02:15:26,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:26,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:26,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:26,937 INFO L87 Difference]: Start difference. First operand 993 states and 3376 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:27,858 INFO L93 Difference]: Finished difference Result 2387 states and 7209 transitions. [2021-04-15 02:15:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:15:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:27,865 INFO L225 Difference]: With dead ends: 2387 [2021-04-15 02:15:27,865 INFO L226 Difference]: Without dead ends: 2387 [2021-04-15 02:15:27,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 683.1ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:15:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-04-15 02:15:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 979. [2021-04-15 02:15:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 3.4161554192229038) internal successors, (3341), 978 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3341 transitions. [2021-04-15 02:15:27,927 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3341 transitions. Word has length 21 [2021-04-15 02:15:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:27,928 INFO L480 AbstractCegarLoop]: Abstraction has 979 states and 3341 transitions. [2021-04-15 02:15:27,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3341 transitions. [2021-04-15 02:15:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:27,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:27,931 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:28,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 02:15:28,148 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 10 times [2021-04-15 02:15:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:28,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668134505] [2021-04-15 02:15:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668134505] [2021-04-15 02:15:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653551524] [2021-04-15 02:15:28,194 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 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 [2021-04-15 02:15:28,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:28,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:28,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:28,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514344928] [2021-04-15 02:15:28,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:28,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:28,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:28,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:28,324 INFO L87 Difference]: Start difference. First operand 979 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:29,048 INFO L93 Difference]: Finished difference Result 2071 states and 6332 transitions. [2021-04-15 02:15:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 02:15:29,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:29,053 INFO L225 Difference]: With dead ends: 2071 [2021-04-15 02:15:29,053 INFO L226 Difference]: Without dead ends: 2071 [2021-04-15 02:15:29,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:15:29,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-04-15 02:15:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 993. [2021-04-15 02:15:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.40625) internal successors, (3379), 992 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3379 transitions. [2021-04-15 02:15:29,086 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3379 transitions. Word has length 21 [2021-04-15 02:15:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:29,086 INFO L480 AbstractCegarLoop]: Abstraction has 993 states and 3379 transitions. [2021-04-15 02:15:29,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3379 transitions. [2021-04-15 02:15:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:29,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:29,089 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:29,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 02:15:29,305 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:29,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:29,305 INFO L82 PathProgramCache]: Analyzing trace with hash -509460446, now seen corresponding path program 11 times [2021-04-15 02:15:29,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:29,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467216026] [2021-04-15 02:15:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467216026] [2021-04-15 02:15:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469707058] [2021-04-15 02:15:29,334 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 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 [2021-04-15 02:15:29,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:15:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:29,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:29,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-04-15 02:15:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115749536] [2021-04-15 02:15:29,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:15:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:15:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:29,430 INFO L87 Difference]: Start difference. First operand 993 states and 3379 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-04-15 02:15:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:29,552 INFO L93 Difference]: Finished difference Result 1610 states and 5032 transitions. [2021-04-15 02:15:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:15:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 [2021-04-15 02:15:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:29,556 INFO L225 Difference]: With dead ends: 1610 [2021-04-15 02:15:29,556 INFO L226 Difference]: Without dead ends: 1602 [2021-04-15 02:15:29,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:15:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-04-15 02:15:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1009. [2021-04-15 02:15:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3878968253968256) internal successors, (3415), 1008 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3415 transitions. [2021-04-15 02:15:29,587 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3415 transitions. Word has length 21 [2021-04-15 02:15:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:29,587 INFO L480 AbstractCegarLoop]: Abstraction has 1009 states and 3415 transitions. [2021-04-15 02:15:29,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-04-15 02:15:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3415 transitions. [2021-04-15 02:15:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:29,589 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:29,590 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:29,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 02:15:29,812 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 12 times [2021-04-15 02:15:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:29,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650625510] [2021-04-15 02:15:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:29,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650625510] [2021-04-15 02:15:29,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194923680] [2021-04-15 02:15:29,849 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 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 [2021-04-15 02:15:29,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 02:15:29,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:29,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:29,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121491841] [2021-04-15 02:15:29,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:29,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:29,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:29,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:29,987 INFO L87 Difference]: Start difference. First operand 1009 states and 3415 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:30,535 INFO L93 Difference]: Finished difference Result 1957 states and 5919 transitions. [2021-04-15 02:15:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:15:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:30,539 INFO L225 Difference]: With dead ends: 1957 [2021-04-15 02:15:30,539 INFO L226 Difference]: Without dead ends: 1936 [2021-04-15 02:15:30,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:15:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-04-15 02:15:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1046. [2021-04-15 02:15:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.3789473684210525) internal successors, (3531), 1045 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3531 transitions. [2021-04-15 02:15:30,573 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3531 transitions. Word has length 21 [2021-04-15 02:15:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:30,573 INFO L480 AbstractCegarLoop]: Abstraction has 1046 states and 3531 transitions. [2021-04-15 02:15:30,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3531 transitions. [2021-04-15 02:15:30,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:30,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:30,577 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:30,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 02:15:30,802 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 13 times [2021-04-15 02:15:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:30,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958567191] [2021-04-15 02:15:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:30,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958567191] [2021-04-15 02:15:30,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489675029] [2021-04-15 02:15:30,840 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 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 [2021-04-15 02:15:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:30,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:30,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:30,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:30,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947550035] [2021-04-15 02:15:30,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:30,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:30,974 INFO L87 Difference]: Start difference. First operand 1046 states and 3531 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 02:15:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:31,686 INFO L93 Difference]: Finished difference Result 2019 states and 6121 transitions. [2021-04-15 02:15:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:15:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-04-15 02:15:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:31,692 INFO L225 Difference]: With dead ends: 2019 [2021-04-15 02:15:31,692 INFO L226 Difference]: Without dead ends: 2019 [2021-04-15 02:15:31,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:15:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-04-15 02:15:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1007. [2021-04-15 02:15:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.3807157057654074) internal successors, (3401), 1006 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3401 transitions. [2021-04-15 02:15:31,731 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3401 transitions. Word has length 21 [2021-04-15 02:15:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:31,731 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 3401 transitions. [2021-04-15 02:15:31,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 02:15:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3401 transitions. [2021-04-15 02:15:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:31,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:31,734 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:31,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 02:15:31,957 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1660587678, now seen corresponding path program 14 times [2021-04-15 02:15:31,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:31,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000476078] [2021-04-15 02:15:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:31,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000476078] [2021-04-15 02:15:31,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774785534] [2021-04-15 02:15:31,997 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:32,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:32,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:32,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:32,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:32,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10886651] [2021-04-15 02:15:32,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:32,131 INFO L87 Difference]: Start difference. First operand 1007 states and 3401 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:32,621 INFO L93 Difference]: Finished difference Result 1560 states and 4856 transitions. [2021-04-15 02:15:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:15:32,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:32,626 INFO L225 Difference]: With dead ends: 1560 [2021-04-15 02:15:32,626 INFO L226 Difference]: Without dead ends: 1510 [2021-04-15 02:15:32,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:15:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-04-15 02:15:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1058. [2021-04-15 02:15:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.3614001892147587) internal successors, (3553), 1057 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3553 transitions. [2021-04-15 02:15:32,659 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3553 transitions. Word has length 21 [2021-04-15 02:15:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:32,660 INFO L480 AbstractCegarLoop]: Abstraction has 1058 states and 3553 transitions. [2021-04-15 02:15:32,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3553 transitions. [2021-04-15 02:15:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:32,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:32,663 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:32,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:32,889 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1126698146, now seen corresponding path program 15 times [2021-04-15 02:15:32,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:32,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404431493] [2021-04-15 02:15:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:32,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404431493] [2021-04-15 02:15:32,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67776199] [2021-04-15 02:15:32,932 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:32,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:15:32,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:32,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:33,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:33,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572529016] [2021-04-15 02:15:33,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:33,094 INFO L87 Difference]: Start difference. First operand 1058 states and 3553 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:33,774 INFO L93 Difference]: Finished difference Result 1960 states and 5933 transitions. [2021-04-15 02:15:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:15:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:33,778 INFO L225 Difference]: With dead ends: 1960 [2021-04-15 02:15:33,778 INFO L226 Difference]: Without dead ends: 1932 [2021-04-15 02:15:33,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:15:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-04-15 02:15:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1170. [2021-04-15 02:15:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.3481608212147136) internal successors, (3914), 1169 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3914 transitions. [2021-04-15 02:15:33,809 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3914 transitions. Word has length 21 [2021-04-15 02:15:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:33,809 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 3914 transitions. [2021-04-15 02:15:33,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3914 transitions. [2021-04-15 02:15:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:33,813 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:33,813 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:34,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 02:15:34,037 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:34,038 INFO L82 PathProgramCache]: Analyzing trace with hash -22103454, now seen corresponding path program 16 times [2021-04-15 02:15:34,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:34,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225450128] [2021-04-15 02:15:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:34,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225450128] [2021-04-15 02:15:34,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618224136] [2021-04-15 02:15:34,076 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 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 [2021-04-15 02:15:34,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:34,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:34,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239254619] [2021-04-15 02:15:34,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:34,191 INFO L87 Difference]: Start difference. First operand 1170 states and 3914 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 02:15:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:34,985 INFO L93 Difference]: Finished difference Result 2038 states and 6143 transitions. [2021-04-15 02:15:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:15:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-04-15 02:15:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:34,989 INFO L225 Difference]: With dead ends: 2038 [2021-04-15 02:15:34,989 INFO L226 Difference]: Without dead ends: 2038 [2021-04-15 02:15:34,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 569.6ms TimeCoverageRelationStatistics Valid=472, Invalid=1168, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:15:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-04-15 02:15:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1160. [2021-04-15 02:15:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3494391716997414) internal successors, (3882), 1159 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3882 transitions. [2021-04-15 02:15:35,015 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3882 transitions. Word has length 21 [2021-04-15 02:15:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:35,015 INFO L480 AbstractCegarLoop]: Abstraction has 1160 states and 3882 transitions. [2021-04-15 02:15:35,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 02:15:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3882 transitions. [2021-04-15 02:15:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:35,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:35,021 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:35,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:35,237 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2048451348, now seen corresponding path program 17 times [2021-04-15 02:15:35,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:35,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373679026] [2021-04-15 02:15:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:35,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373679026] [2021-04-15 02:15:35,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092772066] [2021-04-15 02:15:35,268 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:35,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:15:35,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:35,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:15:35,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:35,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:35,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595767285] [2021-04-15 02:15:35,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:35,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:35,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:35,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:35,367 INFO L87 Difference]: Start difference. First operand 1160 states and 3882 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-04-15 02:15:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:35,532 INFO L93 Difference]: Finished difference Result 2460 states and 7863 transitions. [2021-04-15 02:15:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:15:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 [2021-04-15 02:15:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:35,536 INFO L225 Difference]: With dead ends: 2460 [2021-04-15 02:15:35,536 INFO L226 Difference]: Without dead ends: 2460 [2021-04-15 02:15:35,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:15:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-04-15 02:15:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1533. [2021-04-15 02:15:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.468668407310705) internal successors, (5314), 1532 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5314 transitions. [2021-04-15 02:15:35,571 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5314 transitions. Word has length 21 [2021-04-15 02:15:35,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:35,571 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 5314 transitions. [2021-04-15 02:15:35,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-04-15 02:15:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5314 transitions. [2021-04-15 02:15:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:35,574 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:35,574 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:35,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 02:15:35,778 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:35,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1760711844, now seen corresponding path program 18 times [2021-04-15 02:15:35,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:35,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513242769] [2021-04-15 02:15:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:35,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513242769] [2021-04-15 02:15:35,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874884462] [2021-04-15 02:15:35,807 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 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 [2021-04-15 02:15:35,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:15:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:15:35,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:35,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-04-15 02:15:35,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151490710] [2021-04-15 02:15:35,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:15:35,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:35,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:15:35,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:35,884 INFO L87 Difference]: Start difference. First operand 1533 states and 5314 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-04-15 02:15:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:36,000 INFO L93 Difference]: Finished difference Result 2266 states and 7294 transitions. [2021-04-15 02:15:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:15:36,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 [2021-04-15 02:15:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:36,006 INFO L225 Difference]: With dead ends: 2266 [2021-04-15 02:15:36,006 INFO L226 Difference]: Without dead ends: 2258 [2021-04-15 02:15:36,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:36,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-04-15 02:15:36,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1533. [2021-04-15 02:15:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.4640992167101827) internal successors, (5307), 1532 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5307 transitions. [2021-04-15 02:15:36,046 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5307 transitions. Word has length 21 [2021-04-15 02:15:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:36,046 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 5307 transitions. [2021-04-15 02:15:36,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-04-15 02:15:36,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5307 transitions. [2021-04-15 02:15:36,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:36,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:36,050 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:36,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 02:15:36,265 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1897788598, now seen corresponding path program 19 times [2021-04-15 02:15:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:36,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833858776] [2021-04-15 02:15:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833858776] [2021-04-15 02:15:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225429873] [2021-04-15 02:15:36,297 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 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 [2021-04-15 02:15:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:36,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:36,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 02:15:36,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341987661] [2021-04-15 02:15:36,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:15:36,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:15:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:36,374 INFO L87 Difference]: Start difference. First operand 1533 states and 5307 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-04-15 02:15:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:36,498 INFO L93 Difference]: Finished difference Result 2068 states and 6734 transitions. [2021-04-15 02:15:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:15:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 [2021-04-15 02:15:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:36,502 INFO L225 Difference]: With dead ends: 2068 [2021-04-15 02:15:36,502 INFO L226 Difference]: Without dead ends: 2046 [2021-04-15 02:15:36,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:15:36,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-04-15 02:15:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1571. [2021-04-15 02:15:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.4414012738853503) internal successors, (5403), 1570 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5403 transitions. [2021-04-15 02:15:36,534 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5403 transitions. Word has length 21 [2021-04-15 02:15:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:36,534 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 5403 transitions. [2021-04-15 02:15:36,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-04-15 02:15:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5403 transitions. [2021-04-15 02:15:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:36,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:36,538 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:36,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 02:15:36,761 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:36,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:36,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 2 times [2021-04-15 02:15:36,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:36,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202772081] [2021-04-15 02:15:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202772081] [2021-04-15 02:15:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322382556] [2021-04-15 02:15:36,801 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 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 [2021-04-15 02:15:36,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:36,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:36,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:36,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449822451] [2021-04-15 02:15:36,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:36,935 INFO L87 Difference]: Start difference. First operand 1571 states and 5403 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:37,297 INFO L93 Difference]: Finished difference Result 1717 states and 5770 transitions. [2021-04-15 02:15:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:15:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:37,300 INFO L225 Difference]: With dead ends: 1717 [2021-04-15 02:15:37,301 INFO L226 Difference]: Without dead ends: 1717 [2021-04-15 02:15:37,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:15:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-04-15 02:15:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1595. [2021-04-15 02:15:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.4372647427854455) internal successors, (5479), 1594 states have internal predecessors, (5479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5479 transitions. [2021-04-15 02:15:37,329 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5479 transitions. Word has length 21 [2021-04-15 02:15:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:37,329 INFO L480 AbstractCegarLoop]: Abstraction has 1595 states and 5479 transitions. [2021-04-15 02:15:37,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5479 transitions. [2021-04-15 02:15:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:37,333 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:37,333 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:37,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 02:15:37,549 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 3 times [2021-04-15 02:15:37,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:37,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988388650] [2021-04-15 02:15:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988388650] [2021-04-15 02:15:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133664982] [2021-04-15 02:15:37,590 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 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 [2021-04-15 02:15:37,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:15:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:37,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:37,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:37,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:37,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 02:15:37,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525201735] [2021-04-15 02:15:37,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:15:37,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:37,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:15:37,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:15:37,659 INFO L87 Difference]: Start difference. First operand 1595 states and 5479 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-04-15 02:15:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:37,766 INFO L93 Difference]: Finished difference Result 2609 states and 8666 transitions. [2021-04-15 02:15:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:15:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 [2021-04-15 02:15:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:37,770 INFO L225 Difference]: With dead ends: 2609 [2021-04-15 02:15:37,770 INFO L226 Difference]: Without dead ends: 2597 [2021-04-15 02:15:37,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:15:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-04-15 02:15:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1805. [2021-04-15 02:15:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1804 states have (on average 3.4866962305986697) internal successors, (6290), 1804 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 6290 transitions. [2021-04-15 02:15:37,808 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 6290 transitions. Word has length 21 [2021-04-15 02:15:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 1805 states and 6290 transitions. [2021-04-15 02:15:37,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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) [2021-04-15 02:15:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 6290 transitions. [2021-04-15 02:15:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:37,812 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:37,812 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:38,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 02:15:38,029 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:38,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 4 times [2021-04-15 02:15:38,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:38,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323134385] [2021-04-15 02:15:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:38,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323134385] [2021-04-15 02:15:38,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473866012] [2021-04-15 02:15:38,068 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:38,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:38,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:38,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:38,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:38,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:38,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700437574] [2021-04-15 02:15:38,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:38,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:38,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:38,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:38,218 INFO L87 Difference]: Start difference. First operand 1805 states and 6290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:38,668 INFO L93 Difference]: Finished difference Result 2294 states and 7489 transitions. [2021-04-15 02:15:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:15:38,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:38,673 INFO L225 Difference]: With dead ends: 2294 [2021-04-15 02:15:38,673 INFO L226 Difference]: Without dead ends: 2294 [2021-04-15 02:15:38,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:15:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-04-15 02:15:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1849. [2021-04-15 02:15:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.482683982683983) internal successors, (6436), 1848 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6436 transitions. [2021-04-15 02:15:38,719 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6436 transitions. Word has length 21 [2021-04-15 02:15:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:38,720 INFO L480 AbstractCegarLoop]: Abstraction has 1849 states and 6436 transitions. [2021-04-15 02:15:38,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6436 transitions. [2021-04-15 02:15:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:38,725 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:38,725 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:38,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:38,929 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 5 times [2021-04-15 02:15:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:38,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965767974] [2021-04-15 02:15:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965767974] [2021-04-15 02:15:38,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324358535] [2021-04-15 02:15:38,960 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:38,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:15:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:15:39,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:39,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-04-15 02:15:39,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156729222] [2021-04-15 02:15:39,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:15:39,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:39,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:15:39,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:15:39,060 INFO L87 Difference]: Start difference. First operand 1849 states and 6436 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-04-15 02:15:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:39,198 INFO L93 Difference]: Finished difference Result 3204 states and 10512 transitions. [2021-04-15 02:15:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:15:39,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 [2021-04-15 02:15:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:39,203 INFO L225 Difference]: With dead ends: 3204 [2021-04-15 02:15:39,204 INFO L226 Difference]: Without dead ends: 3204 [2021-04-15 02:15:39,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:15:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-04-15 02:15:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 1852. [2021-04-15 02:15:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.4770394381415453) internal successors, (6436), 1851 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6436 transitions. [2021-04-15 02:15:39,251 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6436 transitions. Word has length 21 [2021-04-15 02:15:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:39,251 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6436 transitions. [2021-04-15 02:15:39,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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) [2021-04-15 02:15:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6436 transitions. [2021-04-15 02:15:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:39,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:39,256 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:39,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 02:15:39,480 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 6 times [2021-04-15 02:15:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:39,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578139485] [2021-04-15 02:15:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578139485] [2021-04-15 02:15:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989511923] [2021-04-15 02:15:39,523 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 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 [2021-04-15 02:15:39,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 02:15:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:39,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:39,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780094902] [2021-04-15 02:15:39,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:39,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:39,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:39,660 INFO L87 Difference]: Start difference. First operand 1852 states and 6436 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:40,197 INFO L93 Difference]: Finished difference Result 2161 states and 7153 transitions. [2021-04-15 02:15:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:15:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:40,202 INFO L225 Difference]: With dead ends: 2161 [2021-04-15 02:15:40,202 INFO L226 Difference]: Without dead ends: 2154 [2021-04-15 02:15:40,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:15:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-04-15 02:15:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1859. [2021-04-15 02:15:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.470936490850377) internal successors, (6449), 1858 states have internal predecessors, (6449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6449 transitions. [2021-04-15 02:15:40,237 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6449 transitions. Word has length 21 [2021-04-15 02:15:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:40,237 INFO L480 AbstractCegarLoop]: Abstraction has 1859 states and 6449 transitions. [2021-04-15 02:15:40,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6449 transitions. [2021-04-15 02:15:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:40,241 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:40,241 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:40,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 02:15:40,442 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 7 times [2021-04-15 02:15:40,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:40,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093282439] [2021-04-15 02:15:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:40,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093282439] [2021-04-15 02:15:40,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307532303] [2021-04-15 02:15:40,470 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 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 [2021-04-15 02:15:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 02:15:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:40,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:40,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 02:15:40,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091108968] [2021-04-15 02:15:40,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:15:40,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:15:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:40,576 INFO L87 Difference]: Start difference. First operand 1859 states and 6449 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-04-15 02:15:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:40,746 INFO L93 Difference]: Finished difference Result 3100 states and 10311 transitions. [2021-04-15 02:15:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:15:40,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 [2021-04-15 02:15:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:40,753 INFO L225 Difference]: With dead ends: 3100 [2021-04-15 02:15:40,753 INFO L226 Difference]: Without dead ends: 3100 [2021-04-15 02:15:40,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:15:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-04-15 02:15:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2105. [2021-04-15 02:15:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 3.491444866920152) internal successors, (7346), 2104 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 7346 transitions. [2021-04-15 02:15:40,800 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 7346 transitions. Word has length 21 [2021-04-15 02:15:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:40,800 INFO L480 AbstractCegarLoop]: Abstraction has 2105 states and 7346 transitions. [2021-04-15 02:15:40,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-04-15 02:15:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 7346 transitions. [2021-04-15 02:15:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:40,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:40,804 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:41,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:41,005 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 8 times [2021-04-15 02:15:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151952183] [2021-04-15 02:15:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151952183] [2021-04-15 02:15:41,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025806872] [2021-04-15 02:15:41,052 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 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 [2021-04-15 02:15:41,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:41,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:41,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:41,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530071351] [2021-04-15 02:15:41,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:41,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:41,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:41,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:41,185 INFO L87 Difference]: Start difference. First operand 2105 states and 7346 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:41,461 INFO L93 Difference]: Finished difference Result 2351 states and 7946 transitions. [2021-04-15 02:15:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:15:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:41,466 INFO L225 Difference]: With dead ends: 2351 [2021-04-15 02:15:41,466 INFO L226 Difference]: Without dead ends: 2326 [2021-04-15 02:15:41,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:15:41,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-04-15 02:15:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2123. [2021-04-15 02:15:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.486804901036758) internal successors, (7399), 2122 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7399 transitions. [2021-04-15 02:15:41,524 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7399 transitions. Word has length 21 [2021-04-15 02:15:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:41,524 INFO L480 AbstractCegarLoop]: Abstraction has 2123 states and 7399 transitions. [2021-04-15 02:15:41,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:41,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7399 transitions. [2021-04-15 02:15:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:41,528 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:41,528 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:41,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-04-15 02:15:41,729 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:41,729 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-04-15 02:15:41,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:41,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31904226] [2021-04-15 02:15:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31904226] [2021-04-15 02:15:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850553547] [2021-04-15 02:15:41,808 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 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 [2021-04-15 02:15:41,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:41,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:41,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:41,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586175433] [2021-04-15 02:15:41,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:41,915 INFO L87 Difference]: Start difference. First operand 2123 states and 7399 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:42,255 INFO L93 Difference]: Finished difference Result 2859 states and 9694 transitions. [2021-04-15 02:15:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:15:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:42,260 INFO L225 Difference]: With dead ends: 2859 [2021-04-15 02:15:42,261 INFO L226 Difference]: Without dead ends: 2859 [2021-04-15 02:15:42,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:15:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2021-04-15 02:15:42,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2081. [2021-04-15 02:15:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.4894230769230767) internal successors, (7258), 2080 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:42,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7258 transitions. [2021-04-15 02:15:42,294 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7258 transitions. Word has length 21 [2021-04-15 02:15:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:42,294 INFO L480 AbstractCegarLoop]: Abstraction has 2081 states and 7258 transitions. [2021-04-15 02:15:42,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:42,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7258 transitions. [2021-04-15 02:15:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:42,298 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:42,298 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:42,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:42,509 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-04-15 02:15:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:42,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334107995] [2021-04-15 02:15:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334107995] [2021-04-15 02:15:42,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292058030] [2021-04-15 02:15:42,555 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 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 [2021-04-15 02:15:42,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:15:42,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:42,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:42,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:42,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6232099] [2021-04-15 02:15:42,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:42,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:42,664 INFO L87 Difference]: Start difference. First operand 2081 states and 7258 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:43,124 INFO L93 Difference]: Finished difference Result 3288 states and 11038 transitions. [2021-04-15 02:15:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:15:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:43,130 INFO L225 Difference]: With dead ends: 3288 [2021-04-15 02:15:43,130 INFO L226 Difference]: Without dead ends: 3288 [2021-04-15 02:15:43,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:15:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-04-15 02:15:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2090. [2021-04-15 02:15:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 3.4897079942556246) internal successors, (7290), 2089 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 7290 transitions. [2021-04-15 02:15:43,186 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 7290 transitions. Word has length 21 [2021-04-15 02:15:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:43,186 INFO L480 AbstractCegarLoop]: Abstraction has 2090 states and 7290 transitions. [2021-04-15 02:15:43,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 7290 transitions. [2021-04-15 02:15:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:43,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:43,190 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:43,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-04-15 02:15:43,391 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:43,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:43,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 9 times [2021-04-15 02:15:43,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:43,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682460389] [2021-04-15 02:15:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682460389] [2021-04-15 02:15:43,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663623434] [2021-04-15 02:15:43,442 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 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 [2021-04-15 02:15:43,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:15:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:43,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:43,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:43,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:43,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468365750] [2021-04-15 02:15:43,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:43,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:43,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:43,593 INFO L87 Difference]: Start difference. First operand 2090 states and 7290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:43,830 INFO L93 Difference]: Finished difference Result 2228 states and 7639 transitions. [2021-04-15 02:15:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:15:43,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:43,838 INFO L225 Difference]: With dead ends: 2228 [2021-04-15 02:15:43,838 INFO L226 Difference]: Without dead ends: 2228 [2021-04-15 02:15:43,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:15:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-04-15 02:15:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2098. [2021-04-15 02:15:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4859322842155462) internal successors, (7310), 2097 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7310 transitions. [2021-04-15 02:15:43,877 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7310 transitions. Word has length 21 [2021-04-15 02:15:43,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:43,877 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 7310 transitions. [2021-04-15 02:15:43,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7310 transitions. [2021-04-15 02:15:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:43,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:43,881 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:44,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 02:15:44,082 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 10 times [2021-04-15 02:15:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:44,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551136212] [2021-04-15 02:15:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:44,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551136212] [2021-04-15 02:15:44,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797768204] [2021-04-15 02:15:44,123 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 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 [2021-04-15 02:15:44,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:44,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:44,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:44,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:44,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605406467] [2021-04-15 02:15:44,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:44,250 INFO L87 Difference]: Start difference. First operand 2098 states and 7310 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:44,554 INFO L93 Difference]: Finished difference Result 2423 states and 8095 transitions. [2021-04-15 02:15:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:15:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:44,558 INFO L225 Difference]: With dead ends: 2423 [2021-04-15 02:15:44,558 INFO L226 Difference]: Without dead ends: 2423 [2021-04-15 02:15:44,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:15:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-04-15 02:15:44,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2098. [2021-04-15 02:15:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4859322842155462) internal successors, (7310), 2097 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7310 transitions. [2021-04-15 02:15:44,588 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7310 transitions. Word has length 21 [2021-04-15 02:15:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:44,588 INFO L480 AbstractCegarLoop]: Abstraction has 2098 states and 7310 transitions. [2021-04-15 02:15:44,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7310 transitions. [2021-04-15 02:15:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:44,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:44,591 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:44,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 02:15:44,792 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 11 times [2021-04-15 02:15:44,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:44,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627986717] [2021-04-15 02:15:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627986717] [2021-04-15 02:15:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698752979] [2021-04-15 02:15:44,836 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 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 [2021-04-15 02:15:44,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:44,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:44,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959969845] [2021-04-15 02:15:44,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:44,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:44,955 INFO L87 Difference]: Start difference. First operand 2098 states and 7310 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:45,230 INFO L93 Difference]: Finished difference Result 2354 states and 7928 transitions. [2021-04-15 02:15:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:15:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 [2021-04-15 02:15:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:45,234 INFO L225 Difference]: With dead ends: 2354 [2021-04-15 02:15:45,234 INFO L226 Difference]: Without dead ends: 2347 [2021-04-15 02:15:45,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:15:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-04-15 02:15:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2082. [2021-04-15 02:15:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.4915905814512254) internal successors, (7266), 2081 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:45,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 7266 transitions. [2021-04-15 02:15:45,261 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 7266 transitions. Word has length 21 [2021-04-15 02:15:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:45,261 INFO L480 AbstractCegarLoop]: Abstraction has 2082 states and 7266 transitions. [2021-04-15 02:15:45,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 02:15:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 7266 transitions. [2021-04-15 02:15:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:45,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:45,264 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:45,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 02:15:45,465 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:45,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 12 times [2021-04-15 02:15:45,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:45,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613424335] [2021-04-15 02:15:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:45,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613424335] [2021-04-15 02:15:45,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664680651] [2021-04-15 02:15:45,508 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 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 [2021-04-15 02:15:45,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:15:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:45,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:45,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290532156] [2021-04-15 02:15:45,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:45,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:45,621 INFO L87 Difference]: Start difference. First operand 2082 states and 7266 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:45,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:45,870 INFO L93 Difference]: Finished difference Result 2181 states and 7519 transitions. [2021-04-15 02:15:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:15:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-04-15 02:15:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:45,875 INFO L225 Difference]: With dead ends: 2181 [2021-04-15 02:15:45,876 INFO L226 Difference]: Without dead ends: 2181 [2021-04-15 02:15:45,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:15:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-04-15 02:15:45,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2064. [2021-04-15 02:15:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4944255937954436) internal successors, (7209), 2063 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7209 transitions. [2021-04-15 02:15:45,911 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7209 transitions. Word has length 21 [2021-04-15 02:15:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:45,912 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7209 transitions. [2021-04-15 02:15:45,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 02:15:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7209 transitions. [2021-04-15 02:15:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:45,916 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:45,916 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:46,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:46,116 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-04-15 02:15:46,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:46,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980573125] [2021-04-15 02:15:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:46,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980573125] [2021-04-15 02:15:46,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051717834] [2021-04-15 02:15:46,165 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 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 [2021-04-15 02:15:46,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:15:46,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:46,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:46,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:46,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 02:15:46,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059073341] [2021-04-15 02:15:46,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:15:46,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:46,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:15:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:46,296 INFO L87 Difference]: Start difference. First operand 2064 states and 7209 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 02:15:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:46,543 INFO L93 Difference]: Finished difference Result 3061 states and 10214 transitions. [2021-04-15 02:15:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:15:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 [2021-04-15 02:15:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:46,550 INFO L225 Difference]: With dead ends: 3061 [2021-04-15 02:15:46,550 INFO L226 Difference]: Without dead ends: 3051 [2021-04-15 02:15:46,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:15:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-04-15 02:15:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2064. [2021-04-15 02:15:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4886088221037324) internal successors, (7197), 2063 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7197 transitions. [2021-04-15 02:15:46,591 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7197 transitions. Word has length 21 [2021-04-15 02:15:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:46,592 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7197 transitions. [2021-04-15 02:15:46,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 02:15:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7197 transitions. [2021-04-15 02:15:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:46,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:46,595 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:46,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 02:15:46,796 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:46,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-04-15 02:15:46,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:46,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690697268] [2021-04-15 02:15:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690697268] [2021-04-15 02:15:46,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050429376] [2021-04-15 02:15:46,842 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 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 [2021-04-15 02:15:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:46,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:46,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055575995] [2021-04-15 02:15:46,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:46,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:46,956 INFO L87 Difference]: Start difference. First operand 2064 states and 7197 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:47,657 INFO L93 Difference]: Finished difference Result 3794 states and 12391 transitions. [2021-04-15 02:15:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:15:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 [2021-04-15 02:15:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:47,666 INFO L225 Difference]: With dead ends: 3794 [2021-04-15 02:15:47,666 INFO L226 Difference]: Without dead ends: 3786 [2021-04-15 02:15:47,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:15:47,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-04-15 02:15:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 2066. [2021-04-15 02:15:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.486682808716707) internal successors, (7200), 2065 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 7200 transitions. [2021-04-15 02:15:47,717 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 7200 transitions. Word has length 21 [2021-04-15 02:15:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:47,718 INFO L480 AbstractCegarLoop]: Abstraction has 2066 states and 7200 transitions. [2021-04-15 02:15:47,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 7200 transitions. [2021-04-15 02:15:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:47,722 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:47,722 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:47,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 02:15:47,924 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-04-15 02:15:47,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:47,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616935219] [2021-04-15 02:15:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:47,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616935219] [2021-04-15 02:15:47,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397184860] [2021-04-15 02:15:47,968 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:47,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:47,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:47,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:48,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:48,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:48,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119006606] [2021-04-15 02:15:48,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:48,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:48,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:48,089 INFO L87 Difference]: Start difference. First operand 2066 states and 7200 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:48,701 INFO L93 Difference]: Finished difference Result 3972 states and 13104 transitions. [2021-04-15 02:15:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:15:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:48,709 INFO L225 Difference]: With dead ends: 3972 [2021-04-15 02:15:48,709 INFO L226 Difference]: Without dead ends: 3972 [2021-04-15 02:15:48,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:15:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-04-15 02:15:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2066. [2021-04-15 02:15:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.486682808716707) internal successors, (7200), 2065 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 7200 transitions. [2021-04-15 02:15:48,768 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 7200 transitions. Word has length 21 [2021-04-15 02:15:48,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:48,769 INFO L480 AbstractCegarLoop]: Abstraction has 2066 states and 7200 transitions. [2021-04-15 02:15:48,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 7200 transitions. [2021-04-15 02:15:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:48,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:48,773 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:48,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:48,973 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-04-15 02:15:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:48,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885511441] [2021-04-15 02:15:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885511441] [2021-04-15 02:15:49,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97749322] [2021-04-15 02:15:49,025 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:49,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 02:15:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:49,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54412843] [2021-04-15 02:15:49,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:49,146 INFO L87 Difference]: Start difference. First operand 2066 states and 7200 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:49,583 INFO L93 Difference]: Finished difference Result 3234 states and 10703 transitions. [2021-04-15 02:15:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:15:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 [2021-04-15 02:15:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:49,587 INFO L225 Difference]: With dead ends: 3234 [2021-04-15 02:15:49,587 INFO L226 Difference]: Without dead ends: 3226 [2021-04-15 02:15:49,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:15:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-04-15 02:15:49,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2062. [2021-04-15 02:15:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.487627365356623) internal successors, (7188), 2061 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7188 transitions. [2021-04-15 02:15:49,621 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7188 transitions. Word has length 21 [2021-04-15 02:15:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:49,621 INFO L480 AbstractCegarLoop]: Abstraction has 2062 states and 7188 transitions. [2021-04-15 02:15:49,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 02:15:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7188 transitions. [2021-04-15 02:15:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:49,624 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:49,624 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:49,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 02:15:49,825 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-04-15 02:15:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:49,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723465089] [2021-04-15 02:15:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:49,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723465089] [2021-04-15 02:15:49,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427614715] [2021-04-15 02:15:49,860 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 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 [2021-04-15 02:15:49,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:49,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:49,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:49,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 02:15:49,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459744550] [2021-04-15 02:15:49,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:15:49,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:15:49,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:49,954 INFO L87 Difference]: Start difference. First operand 2062 states and 7188 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-04-15 02:15:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:50,244 INFO L93 Difference]: Finished difference Result 3086 states and 10253 transitions. [2021-04-15 02:15:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:15:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 [2021-04-15 02:15:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:50,250 INFO L225 Difference]: With dead ends: 3086 [2021-04-15 02:15:50,250 INFO L226 Difference]: Without dead ends: 3074 [2021-04-15 02:15:50,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:15:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-04-15 02:15:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2060. [2021-04-15 02:15:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 3.4890723652258377) internal successors, (7184), 2059 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 7184 transitions. [2021-04-15 02:15:50,290 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 7184 transitions. Word has length 21 [2021-04-15 02:15:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:50,290 INFO L480 AbstractCegarLoop]: Abstraction has 2060 states and 7184 transitions. [2021-04-15 02:15:50,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-04-15 02:15:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 7184 transitions. [2021-04-15 02:15:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:50,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:50,295 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:50,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:50,495 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:50,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-04-15 02:15:50,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:50,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539974865] [2021-04-15 02:15:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:50,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539974865] [2021-04-15 02:15:50,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653801128] [2021-04-15 02:15:50,544 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:50,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:15:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:50,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:50,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:50,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:15:50,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699916087] [2021-04-15 02:15:50,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:15:50,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:50,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:15:50,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:15:50,667 INFO L87 Difference]: Start difference. First operand 2060 states and 7184 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:51,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:51,195 INFO L93 Difference]: Finished difference Result 3522 states and 11795 transitions. [2021-04-15 02:15:51,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:15:51,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 [2021-04-15 02:15:51,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:51,200 INFO L225 Difference]: With dead ends: 3522 [2021-04-15 02:15:51,200 INFO L226 Difference]: Without dead ends: 3522 [2021-04-15 02:15:51,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:15:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2021-04-15 02:15:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 2059. [2021-04-15 02:15:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.4863945578231292) internal successors, (7175), 2058 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 7175 transitions. [2021-04-15 02:15:51,249 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 7175 transitions. Word has length 21 [2021-04-15 02:15:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:51,249 INFO L480 AbstractCegarLoop]: Abstraction has 2059 states and 7175 transitions. [2021-04-15 02:15:51,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 02:15:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 7175 transitions. [2021-04-15 02:15:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:15:51,254 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:51,254 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:51,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 02:15:51,477 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-04-15 02:15:51,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:51,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477908274] [2021-04-15 02:15:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477908274] [2021-04-15 02:15:51,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142357083] [2021-04-15 02:15:51,513 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 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 [2021-04-15 02:15:51,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 02:15:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:15:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:51,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:51,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 02:15:51,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595979913] [2021-04-15 02:15:51,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:15:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:15:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:15:51,625 INFO L87 Difference]: Start difference. First operand 2059 states and 7175 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 02:15:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:52,127 INFO L93 Difference]: Finished difference Result 3352 states and 11113 transitions. [2021-04-15 02:15:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:15:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 [2021-04-15 02:15:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:52,132 INFO L225 Difference]: With dead ends: 3352 [2021-04-15 02:15:52,133 INFO L226 Difference]: Without dead ends: 3342 [2021-04-15 02:15:52,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:15:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-04-15 02:15:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2050. [2021-04-15 02:15:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.486090775988287) internal successors, (7143), 2049 states have internal predecessors, (7143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 7143 transitions. [2021-04-15 02:15:52,168 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 7143 transitions. Word has length 21 [2021-04-15 02:15:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:52,168 INFO L480 AbstractCegarLoop]: Abstraction has 2050 states and 7143 transitions. [2021-04-15 02:15:52,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 02:15:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 7143 transitions. [2021-04-15 02:15:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:52,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:52,171 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:52,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:52,372 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:52,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:52,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1465137408, now seen corresponding path program 20 times [2021-04-15 02:15:52,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:52,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363856801] [2021-04-15 02:15:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:52,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363856801] [2021-04-15 02:15:52,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511828649] [2021-04-15 02:15:52,478 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 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 [2021-04-15 02:15:52,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:52,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:52,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:52,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684229354] [2021-04-15 02:15:52,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:52,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:52,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:52,676 INFO L87 Difference]: Start difference. First operand 2050 states and 7143 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:52,939 INFO L93 Difference]: Finished difference Result 2694 states and 9038 transitions. [2021-04-15 02:15:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:15:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:52,946 INFO L225 Difference]: With dead ends: 2694 [2021-04-15 02:15:52,946 INFO L226 Difference]: Without dead ends: 2664 [2021-04-15 02:15:52,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:15:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-04-15 02:15:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2237. [2021-04-15 02:15:52,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4910554561717353) internal successors, (7806), 2236 states have internal predecessors, (7806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7806 transitions. [2021-04-15 02:15:52,999 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7806 transitions. Word has length 23 [2021-04-15 02:15:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:52,999 INFO L480 AbstractCegarLoop]: Abstraction has 2237 states and 7806 transitions. [2021-04-15 02:15:52,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7806 transitions. [2021-04-15 02:15:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:53,004 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:53,004 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:53,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 02:15:53,217 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 69803706, now seen corresponding path program 21 times [2021-04-15 02:15:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:53,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049642340] [2021-04-15 02:15:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:15:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049642340] [2021-04-15 02:15:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575292868] [2021-04-15 02:15:53,285 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:53,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:15:53,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:53,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:53,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:53,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255632626] [2021-04-15 02:15:53,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:53,475 INFO L87 Difference]: Start difference. First operand 2237 states and 7806 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:53,694 INFO L93 Difference]: Finished difference Result 3253 states and 10967 transitions. [2021-04-15 02:15:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:15:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:53,702 INFO L225 Difference]: With dead ends: 3253 [2021-04-15 02:15:53,702 INFO L226 Difference]: Without dead ends: 3183 [2021-04-15 02:15:53,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:15:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2021-04-15 02:15:53,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 2645. [2021-04-15 02:15:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.5155068078668683) internal successors, (9295), 2644 states have internal predecessors, (9295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 9295 transitions. [2021-04-15 02:15:53,774 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 9295 transitions. Word has length 23 [2021-04-15 02:15:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:53,774 INFO L480 AbstractCegarLoop]: Abstraction has 2645 states and 9295 transitions. [2021-04-15 02:15:53,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 9295 transitions. [2021-04-15 02:15:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:53,780 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:53,780 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:54,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 02:15:54,004 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1354898098, now seen corresponding path program 13 times [2021-04-15 02:15:54,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:54,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061031224] [2021-04-15 02:15:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061031224] [2021-04-15 02:15:54,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797683223] [2021-04-15 02:15:54,075 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 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 [2021-04-15 02:15:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:54,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047476617] [2021-04-15 02:15:54,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:54,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:54,181 INFO L87 Difference]: Start difference. First operand 2645 states and 9295 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:54,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:54,351 INFO L93 Difference]: Finished difference Result 3798 states and 12972 transitions. [2021-04-15 02:15:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:15:54,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:54,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:54,360 INFO L225 Difference]: With dead ends: 3798 [2021-04-15 02:15:54,360 INFO L226 Difference]: Without dead ends: 3768 [2021-04-15 02:15:54,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-04-15 02:15:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3007. [2021-04-15 02:15:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 3.5449101796407185) internal successors, (10656), 3006 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 10656 transitions. [2021-04-15 02:15:54,449 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 10656 transitions. Word has length 23 [2021-04-15 02:15:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:54,449 INFO L480 AbstractCegarLoop]: Abstraction has 3007 states and 10656 transitions. [2021-04-15 02:15:54,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 10656 transitions. [2021-04-15 02:15:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:54,455 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:54,455 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:54,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 02:15:54,661 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1874831856, now seen corresponding path program 14 times [2021-04-15 02:15:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:54,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535561611] [2021-04-15 02:15:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:54,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535561611] [2021-04-15 02:15:54,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447773249] [2021-04-15 02:15:54,725 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:54,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:15:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:54,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:54,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:54,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577244981] [2021-04-15 02:15:54,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:54,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:54,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:54,862 INFO L87 Difference]: Start difference. First operand 3007 states and 10656 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:55,058 INFO L93 Difference]: Finished difference Result 3887 states and 13425 transitions. [2021-04-15 02:15:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:15:55,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:55,068 INFO L225 Difference]: With dead ends: 3887 [2021-04-15 02:15:55,069 INFO L226 Difference]: Without dead ends: 3835 [2021-04-15 02:15:55,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:15:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-04-15 02:15:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3265. [2021-04-15 02:15:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.549019607843137) internal successors, (11584), 3264 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11584 transitions. [2021-04-15 02:15:55,155 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11584 transitions. Word has length 23 [2021-04-15 02:15:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:55,155 INFO L480 AbstractCegarLoop]: Abstraction has 3265 states and 11584 transitions. [2021-04-15 02:15:55,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11584 transitions. [2021-04-15 02:15:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:55,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:55,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:55,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 02:15:55,377 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 15 times [2021-04-15 02:15:55,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:55,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779631766] [2021-04-15 02:15:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779631766] [2021-04-15 02:15:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245637684] [2021-04-15 02:15:55,458 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 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 [2021-04-15 02:15:55,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:15:55,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:55,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:55,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:55,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963944600] [2021-04-15 02:15:55,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:55,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:55,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:55,597 INFO L87 Difference]: Start difference. First operand 3265 states and 11584 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:55,730 INFO L93 Difference]: Finished difference Result 3597 states and 12578 transitions. [2021-04-15 02:15:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:15:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:55,737 INFO L225 Difference]: With dead ends: 3597 [2021-04-15 02:15:55,737 INFO L226 Difference]: Without dead ends: 3567 [2021-04-15 02:15:55,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:15:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-04-15 02:15:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3319. [2021-04-15 02:15:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.5491259795057264) internal successors, (11776), 3318 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 11776 transitions. [2021-04-15 02:15:55,795 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 11776 transitions. Word has length 23 [2021-04-15 02:15:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:55,796 INFO L480 AbstractCegarLoop]: Abstraction has 3319 states and 11776 transitions. [2021-04-15 02:15:55,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 11776 transitions. [2021-04-15 02:15:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:55,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:55,801 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:56,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 02:15:56,001 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 16 times [2021-04-15 02:15:56,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:56,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354774310] [2021-04-15 02:15:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:56,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354774310] [2021-04-15 02:15:56,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340424855] [2021-04-15 02:15:56,084 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 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 [2021-04-15 02:15:56,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:56,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:56,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036497780] [2021-04-15 02:15:56,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:56,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:56,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:56,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:56,213 INFO L87 Difference]: Start difference. First operand 3319 states and 11776 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:56,422 INFO L93 Difference]: Finished difference Result 3599 states and 12594 transitions. [2021-04-15 02:15:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:15:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:56,430 INFO L225 Difference]: With dead ends: 3599 [2021-04-15 02:15:56,430 INFO L226 Difference]: Without dead ends: 3569 [2021-04-15 02:15:56,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:15:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-04-15 02:15:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3339. [2021-04-15 02:15:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 3.5452366686638705) internal successors, (11834), 3338 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 11834 transitions. [2021-04-15 02:15:56,484 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 11834 transitions. Word has length 23 [2021-04-15 02:15:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 3339 states and 11834 transitions. [2021-04-15 02:15:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 11834 transitions. [2021-04-15 02:15:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:56,491 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:56,491 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:56,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-04-15 02:15:56,697 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 466923328, now seen corresponding path program 17 times [2021-04-15 02:15:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:56,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337944096] [2021-04-15 02:15:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337944096] [2021-04-15 02:15:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234776553] [2021-04-15 02:15:56,756 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 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 [2021-04-15 02:15:56,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:15:56,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:56,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:56,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350288323] [2021-04-15 02:15:56,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:56,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:56,875 INFO L87 Difference]: Start difference. First operand 3339 states and 11834 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:57,037 INFO L93 Difference]: Finished difference Result 3822 states and 13200 transitions. [2021-04-15 02:15:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:15:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:57,044 INFO L225 Difference]: With dead ends: 3822 [2021-04-15 02:15:57,045 INFO L226 Difference]: Without dead ends: 3742 [2021-04-15 02:15:57,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-04-15 02:15:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3391. [2021-04-15 02:15:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.53952802359882) internal successors, (11999), 3390 states have internal predecessors, (11999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 11999 transitions. [2021-04-15 02:15:57,094 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 11999 transitions. Word has length 23 [2021-04-15 02:15:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:57,094 INFO L480 AbstractCegarLoop]: Abstraction has 3391 states and 11999 transitions. [2021-04-15 02:15:57,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 11999 transitions. [2021-04-15 02:15:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:15:57,098 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:57,099 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:57,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:57,299 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash 237981316, now seen corresponding path program 18 times [2021-04-15 02:15:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:57,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085991824] [2021-04-15 02:15:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:57,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085991824] [2021-04-15 02:15:57,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283503790] [2021-04-15 02:15:57,356 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 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 [2021-04-15 02:15:57,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:15:57,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:15:57,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:57,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:57,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-04-15 02:15:57,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328328946] [2021-04-15 02:15:57,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:15:57,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:57,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:15:57,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:15:57,486 INFO L87 Difference]: Start difference. First operand 3391 states and 11999 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:57,684 INFO L93 Difference]: Finished difference Result 4400 states and 15094 transitions. [2021-04-15 02:15:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:15:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:15:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:57,692 INFO L225 Difference]: With dead ends: 4400 [2021-04-15 02:15:57,692 INFO L226 Difference]: Without dead ends: 4355 [2021-04-15 02:15:57,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:15:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-04-15 02:15:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3682. [2021-04-15 02:15:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 3.556370551480576) internal successors, (13091), 3681 states have internal predecessors, (13091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 13091 transitions. [2021-04-15 02:15:57,765 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 13091 transitions. Word has length 23 [2021-04-15 02:15:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:57,765 INFO L480 AbstractCegarLoop]: Abstraction has 3682 states and 13091 transitions. [2021-04-15 02:15:57,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 13091 transitions. [2021-04-15 02:15:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:15:57,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:57,772 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:57,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:57,973 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 290682850, now seen corresponding path program 22 times [2021-04-15 02:15:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:57,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639222906] [2021-04-15 02:15:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639222906] [2021-04-15 02:15:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155065885] [2021-04-15 02:15:58,016 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 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 [2021-04-15 02:15:58,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:15:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:15:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:15:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:58,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:58,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:15:58,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631593127] [2021-04-15 02:15:58,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:15:58,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:15:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:58,179 INFO L87 Difference]: Start difference. First operand 3682 states and 13091 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:15:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:58,428 INFO L93 Difference]: Finished difference Result 6019 states and 20295 transitions. [2021-04-15 02:15:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:15:58,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:15:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:58,439 INFO L225 Difference]: With dead ends: 6019 [2021-04-15 02:15:58,439 INFO L226 Difference]: Without dead ends: 6019 [2021-04-15 02:15:58,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:15:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-04-15 02:15:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 4114. [2021-04-15 02:15:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 3.573547289083394) internal successors, (14698), 4113 states have internal predecessors, (14698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 14698 transitions. [2021-04-15 02:15:58,514 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 14698 transitions. Word has length 25 [2021-04-15 02:15:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:58,514 INFO L480 AbstractCegarLoop]: Abstraction has 4114 states and 14698 transitions. [2021-04-15 02:15:58,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:15:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 14698 transitions. [2021-04-15 02:15:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:15:58,520 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:58,520 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:58,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:58,721 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 19 times [2021-04-15 02:15:58,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:58,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224293556] [2021-04-15 02:15:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:58,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224293556] [2021-04-15 02:15:58,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857580491] [2021-04-15 02:15:58,772 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:15:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:58,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:15:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:58,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:15:58,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:15:58,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647992896] [2021-04-15 02:15:58,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:15:58,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:15:58,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:15:58,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:15:58,946 INFO L87 Difference]: Start difference. First operand 4114 states and 14698 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:15:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:15:59,419 INFO L93 Difference]: Finished difference Result 6055 states and 21073 transitions. [2021-04-15 02:15:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:15:59,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:15:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:15:59,431 INFO L225 Difference]: With dead ends: 6055 [2021-04-15 02:15:59,431 INFO L226 Difference]: Without dead ends: 6055 [2021-04-15 02:15:59,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:15:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2021-04-15 02:15:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 4326. [2021-04-15 02:15:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 3.570173410404624) internal successors, (15441), 4325 states have internal predecessors, (15441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:15:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 15441 transitions. [2021-04-15 02:15:59,537 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 15441 transitions. Word has length 25 [2021-04-15 02:15:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:15:59,537 INFO L480 AbstractCegarLoop]: Abstraction has 4326 states and 15441 transitions. [2021-04-15 02:15:59,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:15:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 15441 transitions. [2021-04-15 02:15:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:15:59,544 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:15:59,544 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:15:59,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:15:59,745 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:15:59,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:15:59,745 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 23 times [2021-04-15 02:15:59,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:15:59,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675181292] [2021-04-15 02:15:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:15:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:15:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:15:59,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675181292] [2021-04-15 02:15:59,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357146017] [2021-04-15 02:15:59,806 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 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 [2021-04-15 02:15:59,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:15:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:15:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:15:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:00,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:00,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:00,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722202662] [2021-04-15 02:16:00,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:00,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:00,030 INFO L87 Difference]: Start difference. First operand 4326 states and 15441 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:16:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:02,306 INFO L93 Difference]: Finished difference Result 8944 states and 29175 transitions. [2021-04-15 02:16:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-04-15 02:16:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:16:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:02,326 INFO L225 Difference]: With dead ends: 8944 [2021-04-15 02:16:02,326 INFO L226 Difference]: Without dead ends: 8944 [2021-04-15 02:16:02,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1810.8ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-04-15 02:16:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8944 states. [2021-04-15 02:16:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8944 to 4865. [2021-04-15 02:16:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 3.591282894736842) internal successors, (17468), 4864 states have internal predecessors, (17468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 17468 transitions. [2021-04-15 02:16:02,457 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 17468 transitions. Word has length 25 [2021-04-15 02:16:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:02,457 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 17468 transitions. [2021-04-15 02:16:02,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:16:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 17468 transitions. [2021-04-15 02:16:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:02,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:02,465 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:02,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 02:16:02,685 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 20 times [2021-04-15 02:16:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:02,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586155419] [2021-04-15 02:16:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586155419] [2021-04-15 02:16:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303065276] [2021-04-15 02:16:02,728 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 [2021-04-15 02:16:02,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:02,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:16:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:02,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:02,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:16:02,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156140231] [2021-04-15 02:16:02,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:16:02,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:16:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:16:02,895 INFO L87 Difference]: Start difference. First operand 4865 states and 17468 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:16:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:04,253 INFO L93 Difference]: Finished difference Result 13448 states and 45266 transitions. [2021-04-15 02:16:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 02:16:04,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:16:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:04,284 INFO L225 Difference]: With dead ends: 13448 [2021-04-15 02:16:04,284 INFO L226 Difference]: Without dead ends: 13438 [2021-04-15 02:16:04,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 885.8ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:16:04,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2021-04-15 02:16:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 6561. [2021-04-15 02:16:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6561 states, 6560 states have (on average 3.6759146341463413) internal successors, (24114), 6560 states have internal predecessors, (24114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 24114 transitions. [2021-04-15 02:16:04,471 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 24114 transitions. Word has length 25 [2021-04-15 02:16:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:04,471 INFO L480 AbstractCegarLoop]: Abstraction has 6561 states and 24114 transitions. [2021-04-15 02:16:04,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:16:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 24114 transitions. [2021-04-15 02:16:04,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:04,482 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:04,483 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:04,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:04,683 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:04,683 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 21 times [2021-04-15 02:16:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:04,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190168946] [2021-04-15 02:16:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190168946] [2021-04-15 02:16:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066122261] [2021-04-15 02:16:04,724 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 [2021-04-15 02:16:04,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:16:04,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:04,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:16:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:04,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:04,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:16:04,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152106801] [2021-04-15 02:16:04,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:16:04,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:16:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:16:04,863 INFO L87 Difference]: Start difference. First operand 6561 states and 24114 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:16:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:06,016 INFO L93 Difference]: Finished difference Result 15900 states and 53109 transitions. [2021-04-15 02:16:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:16:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:16:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:06,047 INFO L225 Difference]: With dead ends: 15900 [2021-04-15 02:16:06,047 INFO L226 Difference]: Without dead ends: 15900 [2021-04-15 02:16:06,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 750.8ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:16:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2021-04-15 02:16:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 5733. [2021-04-15 02:16:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5733 states, 5732 states have (on average 3.641486392184229) internal successors, (20873), 5732 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5733 states to 5733 states and 20873 transitions. [2021-04-15 02:16:06,224 INFO L78 Accepts]: Start accepts. Automaton has 5733 states and 20873 transitions. Word has length 25 [2021-04-15 02:16:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:06,224 INFO L480 AbstractCegarLoop]: Abstraction has 5733 states and 20873 transitions. [2021-04-15 02:16:06,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:16:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5733 states and 20873 transitions. [2021-04-15 02:16:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:06,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:06,235 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:06,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-15 02:16:06,449 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 24 times [2021-04-15 02:16:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:06,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758017466] [2021-04-15 02:16:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:06,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758017466] [2021-04-15 02:16:06,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138522585] [2021-04-15 02:16:06,493 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 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 [2021-04-15 02:16:06,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:16:06,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:06,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:06,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055576198] [2021-04-15 02:16:06,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:06,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:06,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:06,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:06,658 INFO L87 Difference]: Start difference. First operand 5733 states and 20873 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:08,164 INFO L93 Difference]: Finished difference Result 8941 states and 29935 transitions. [2021-04-15 02:16:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 02:16:08,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:08,183 INFO L225 Difference]: With dead ends: 8941 [2021-04-15 02:16:08,183 INFO L226 Difference]: Without dead ends: 8913 [2021-04-15 02:16:08,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 02:16:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8913 states. [2021-04-15 02:16:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8913 to 5621. [2021-04-15 02:16:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5620 states have (on average 3.6487544483985763) internal successors, (20506), 5620 states have internal predecessors, (20506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 20506 transitions. [2021-04-15 02:16:08,322 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 20506 transitions. Word has length 25 [2021-04-15 02:16:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:08,322 INFO L480 AbstractCegarLoop]: Abstraction has 5621 states and 20506 transitions. [2021-04-15 02:16:08,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 20506 transitions. [2021-04-15 02:16:08,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:08,332 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:08,332 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:08,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:08,533 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 25 times [2021-04-15 02:16:08,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:08,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630760233] [2021-04-15 02:16:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:08,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630760233] [2021-04-15 02:16:08,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551779570] [2021-04-15 02:16:08,587 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 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 [2021-04-15 02:16:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:08,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:08,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:08,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946387248] [2021-04-15 02:16:08,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:08,774 INFO L87 Difference]: Start difference. First operand 5621 states and 20506 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:10,102 INFO L93 Difference]: Finished difference Result 8862 states and 29798 transitions. [2021-04-15 02:16:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:16:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:10,126 INFO L225 Difference]: With dead ends: 8862 [2021-04-15 02:16:10,127 INFO L226 Difference]: Without dead ends: 8799 [2021-04-15 02:16:10,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:16:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8799 states. [2021-04-15 02:16:10,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8799 to 5763. [2021-04-15 02:16:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 5762 states have (on average 3.6336341548073587) internal successors, (20937), 5762 states have internal predecessors, (20937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 20937 transitions. [2021-04-15 02:16:10,287 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 20937 transitions. Word has length 25 [2021-04-15 02:16:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:10,287 INFO L480 AbstractCegarLoop]: Abstraction has 5763 states and 20937 transitions. [2021-04-15 02:16:10,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 20937 transitions. [2021-04-15 02:16:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:10,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:10,299 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:10,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 02:16:10,501 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 92819810, now seen corresponding path program 26 times [2021-04-15 02:16:10,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:10,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751447357] [2021-04-15 02:16:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:10,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751447357] [2021-04-15 02:16:10,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312266049] [2021-04-15 02:16:10,547 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 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 [2021-04-15 02:16:10,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:10,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:10,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:10,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744482297] [2021-04-15 02:16:10,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:10,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:10,716 INFO L87 Difference]: Start difference. First operand 5763 states and 20937 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:11,581 INFO L93 Difference]: Finished difference Result 8860 states and 29919 transitions. [2021-04-15 02:16:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:16:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:11,602 INFO L225 Difference]: With dead ends: 8860 [2021-04-15 02:16:11,602 INFO L226 Difference]: Without dead ends: 8782 [2021-04-15 02:16:11,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:16:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8782 states. [2021-04-15 02:16:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8782 to 5891. [2021-04-15 02:16:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 5890 states have (on average 3.6220713073005095) internal successors, (21334), 5890 states have internal predecessors, (21334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 21334 transitions. [2021-04-15 02:16:11,789 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 21334 transitions. Word has length 25 [2021-04-15 02:16:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:11,789 INFO L480 AbstractCegarLoop]: Abstraction has 5891 states and 21334 transitions. [2021-04-15 02:16:11,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:11,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 21334 transitions. [2021-04-15 02:16:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:11,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:11,799 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:11,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:11,999 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:12,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 27 times [2021-04-15 02:16:12,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:12,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891056760] [2021-04-15 02:16:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891056760] [2021-04-15 02:16:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997325390] [2021-04-15 02:16:12,037 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 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 [2021-04-15 02:16:12,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:16:12,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:12,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:12,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:12,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:12,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637246347] [2021-04-15 02:16:12,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:12,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:12,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:12,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:12,203 INFO L87 Difference]: Start difference. First operand 5891 states and 21334 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:14,250 INFO L93 Difference]: Finished difference Result 10662 states and 35698 transitions. [2021-04-15 02:16:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-04-15 02:16:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:16:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:14,275 INFO L225 Difference]: With dead ends: 10662 [2021-04-15 02:16:14,275 INFO L226 Difference]: Without dead ends: 10662 [2021-04-15 02:16:14,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1508.8ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 02:16:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-04-15 02:16:14,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 6331. [2021-04-15 02:16:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 3.6642969984202214) internal successors, (23195), 6330 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 23195 transitions. [2021-04-15 02:16:14,461 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 23195 transitions. Word has length 25 [2021-04-15 02:16:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:14,461 INFO L480 AbstractCegarLoop]: Abstraction has 6331 states and 23195 transitions. [2021-04-15 02:16:14,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 23195 transitions. [2021-04-15 02:16:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:14,474 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:14,474 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:14,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:14,675 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:14,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 28 times [2021-04-15 02:16:14,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:14,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997436535] [2021-04-15 02:16:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:14,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997436535] [2021-04-15 02:16:14,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792880160] [2021-04-15 02:16:14,714 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 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 [2021-04-15 02:16:14,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:16:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:14,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:14,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:14,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138425257] [2021-04-15 02:16:14,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:14,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:14,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:14,891 INFO L87 Difference]: Start difference. First operand 6331 states and 23195 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:16,160 INFO L93 Difference]: Finished difference Result 9366 states and 31774 transitions. [2021-04-15 02:16:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 02:16:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:16,184 INFO L225 Difference]: With dead ends: 9366 [2021-04-15 02:16:16,184 INFO L226 Difference]: Without dead ends: 9331 [2021-04-15 02:16:16,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:16:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2021-04-15 02:16:16,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 6323. [2021-04-15 02:16:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 6322 states have (on average 3.6616577032584625) internal successors, (23149), 6322 states have internal predecessors, (23149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:16,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 23149 transitions. [2021-04-15 02:16:16,432 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 23149 transitions. Word has length 25 [2021-04-15 02:16:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:16,433 INFO L480 AbstractCegarLoop]: Abstraction has 6323 states and 23149 transitions. [2021-04-15 02:16:16,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 23149 transitions. [2021-04-15 02:16:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:16,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:16,448 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:16,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-04-15 02:16:16,649 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 29 times [2021-04-15 02:16:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:16,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022708073] [2021-04-15 02:16:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022708073] [2021-04-15 02:16:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119236386] [2021-04-15 02:16:16,693 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 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 [2021-04-15 02:16:16,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:16:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:16,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:16,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921205396] [2021-04-15 02:16:16,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:16,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:16,879 INFO L87 Difference]: Start difference. First operand 6323 states and 23149 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:19,038 INFO L93 Difference]: Finished difference Result 11065 states and 37330 transitions. [2021-04-15 02:16:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-04-15 02:16:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:16:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:19,059 INFO L225 Difference]: With dead ends: 11065 [2021-04-15 02:16:19,059 INFO L226 Difference]: Without dead ends: 11065 [2021-04-15 02:16:19,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1520.9ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 02:16:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2021-04-15 02:16:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 6327. [2021-04-15 02:16:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.66645589630098) internal successors, (23194), 6326 states have internal predecessors, (23194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 23194 transitions. [2021-04-15 02:16:19,252 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 23194 transitions. Word has length 25 [2021-04-15 02:16:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:19,252 INFO L480 AbstractCegarLoop]: Abstraction has 6327 states and 23194 transitions. [2021-04-15 02:16:19,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 23194 transitions. [2021-04-15 02:16:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:19,262 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:19,262 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:19,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:19,462 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 30 times [2021-04-15 02:16:19,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:19,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826338665] [2021-04-15 02:16:19,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:19,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826338665] [2021-04-15 02:16:19,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556443071] [2021-04-15 02:16:19,516 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 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 [2021-04-15 02:16:19,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:16:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:19,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:19,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:19,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:19,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218593066] [2021-04-15 02:16:19,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:19,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:19,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:19,682 INFO L87 Difference]: Start difference. First operand 6327 states and 23194 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:21,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:21,153 INFO L93 Difference]: Finished difference Result 10442 states and 35260 transitions. [2021-04-15 02:16:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-04-15 02:16:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:16:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:21,174 INFO L225 Difference]: With dead ends: 10442 [2021-04-15 02:16:21,174 INFO L226 Difference]: Without dead ends: 10430 [2021-04-15 02:16:21,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1042.5ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 02:16:21,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-04-15 02:16:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 6390. [2021-04-15 02:16:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.6572233526373457) internal successors, (23366), 6389 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 23366 transitions. [2021-04-15 02:16:21,337 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 23366 transitions. Word has length 25 [2021-04-15 02:16:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:21,337 INFO L480 AbstractCegarLoop]: Abstraction has 6390 states and 23366 transitions. [2021-04-15 02:16:21,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:21,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 23366 transitions. [2021-04-15 02:16:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:21,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:21,348 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:21,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:21,550 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash -347367198, now seen corresponding path program 31 times [2021-04-15 02:16:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:21,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181431197] [2021-04-15 02:16:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:21,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181431197] [2021-04-15 02:16:21,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534679190] [2021-04-15 02:16:21,582 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:16:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:16:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:21,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:21,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 02:16:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561924477] [2021-04-15 02:16:21,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:16:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:16:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:16:21,748 INFO L87 Difference]: Start difference. First operand 6390 states and 23366 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:16:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:21,933 INFO L93 Difference]: Finished difference Result 8474 states and 29418 transitions. [2021-04-15 02:16:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:16:21,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 [2021-04-15 02:16:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:21,948 INFO L225 Difference]: With dead ends: 8474 [2021-04-15 02:16:21,948 INFO L226 Difference]: Without dead ends: 8466 [2021-04-15 02:16:21,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:16:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-04-15 02:16:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 6063. [2021-04-15 02:16:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 6062 states have (on average 3.6413724843286044) internal successors, (22074), 6062 states have internal predecessors, (22074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 22074 transitions. [2021-04-15 02:16:22,092 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 22074 transitions. Word has length 25 [2021-04-15 02:16:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:22,092 INFO L480 AbstractCegarLoop]: Abstraction has 6063 states and 22074 transitions. [2021-04-15 02:16:22,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:16:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 22074 transitions. [2021-04-15 02:16:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:22,104 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:22,104 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:22,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 02:16:22,309 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 32 times [2021-04-15 02:16:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:22,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142404461] [2021-04-15 02:16:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142404461] [2021-04-15 02:16:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472835780] [2021-04-15 02:16:22,350 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 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 [2021-04-15 02:16:22,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:22,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:22,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:22,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535129416] [2021-04-15 02:16:22,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:22,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:22,537 INFO L87 Difference]: Start difference. First operand 6063 states and 22074 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:23,877 INFO L93 Difference]: Finished difference Result 9404 states and 31613 transitions. [2021-04-15 02:16:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 02:16:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:23,903 INFO L225 Difference]: With dead ends: 9404 [2021-04-15 02:16:23,903 INFO L226 Difference]: Without dead ends: 9383 [2021-04-15 02:16:23,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:16:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9383 states. [2021-04-15 02:16:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9383 to 6156. [2021-04-15 02:16:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 6155 states have (on average 3.6417546709991875) internal successors, (22415), 6155 states have internal predecessors, (22415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 22415 transitions. [2021-04-15 02:16:24,083 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 22415 transitions. Word has length 25 [2021-04-15 02:16:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:24,083 INFO L480 AbstractCegarLoop]: Abstraction has 6156 states and 22415 transitions. [2021-04-15 02:16:24,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 22415 transitions. [2021-04-15 02:16:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:24,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:24,096 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:24,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:24,297 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 33 times [2021-04-15 02:16:24,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:24,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337783286] [2021-04-15 02:16:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337783286] [2021-04-15 02:16:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45449174] [2021-04-15 02:16:24,352 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:16:24,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:16:24,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:24,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:24,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:24,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633396918] [2021-04-15 02:16:24,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:24,587 INFO L87 Difference]: Start difference. First operand 6156 states and 22415 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:16:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:26,445 INFO L93 Difference]: Finished difference Result 10034 states and 33238 transitions. [2021-04-15 02:16:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 02:16:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 [2021-04-15 02:16:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:26,471 INFO L225 Difference]: With dead ends: 10034 [2021-04-15 02:16:26,471 INFO L226 Difference]: Without dead ends: 10022 [2021-04-15 02:16:26,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1263.5ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 02:16:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-04-15 02:16:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 5985. [2021-04-15 02:16:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5985 states, 5984 states have (on average 3.633522727272727) internal successors, (21743), 5984 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 21743 transitions. [2021-04-15 02:16:26,648 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 21743 transitions. Word has length 25 [2021-04-15 02:16:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:26,648 INFO L480 AbstractCegarLoop]: Abstraction has 5985 states and 21743 transitions. [2021-04-15 02:16:26,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:16:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 21743 transitions. [2021-04-15 02:16:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:26,660 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:26,660 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:26,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 02:16:26,860 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 34 times [2021-04-15 02:16:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:26,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869981636] [2021-04-15 02:16:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:26,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869981636] [2021-04-15 02:16:26,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503918150] [2021-04-15 02:16:26,908 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 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 [2021-04-15 02:16:26,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:16:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:27,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:27,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:27,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806573073] [2021-04-15 02:16:27,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:27,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:27,119 INFO L87 Difference]: Start difference. First operand 5985 states and 21743 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:28,379 INFO L93 Difference]: Finished difference Result 10351 states and 35239 transitions. [2021-04-15 02:16:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:16:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:28,402 INFO L225 Difference]: With dead ends: 10351 [2021-04-15 02:16:28,402 INFO L226 Difference]: Without dead ends: 10288 [2021-04-15 02:16:28,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:16:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10288 states. [2021-04-15 02:16:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10288 to 6607. [2021-04-15 02:16:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6607 states, 6606 states have (on average 3.6678776869512566) internal successors, (24230), 6606 states have internal predecessors, (24230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 24230 transitions. [2021-04-15 02:16:28,572 INFO L78 Accepts]: Start accepts. Automaton has 6607 states and 24230 transitions. Word has length 25 [2021-04-15 02:16:28,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:28,572 INFO L480 AbstractCegarLoop]: Abstraction has 6607 states and 24230 transitions. [2021-04-15 02:16:28,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6607 states and 24230 transitions. [2021-04-15 02:16:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:28,583 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:28,583 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:28,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 02:16:28,783 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 35 times [2021-04-15 02:16:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:28,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857824889] [2021-04-15 02:16:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:28,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857824889] [2021-04-15 02:16:28,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152725828] [2021-04-15 02:16:28,822 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 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 [2021-04-15 02:16:28,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:16:28,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:28,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:28,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:28,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:28,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665328999] [2021-04-15 02:16:28,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:28,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:28,968 INFO L87 Difference]: Start difference. First operand 6607 states and 24230 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:30,194 INFO L93 Difference]: Finished difference Result 11074 states and 37311 transitions. [2021-04-15 02:16:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 02:16:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:30,216 INFO L225 Difference]: With dead ends: 11074 [2021-04-15 02:16:30,216 INFO L226 Difference]: Without dead ends: 11032 [2021-04-15 02:16:30,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:16:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11032 states. [2021-04-15 02:16:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11032 to 7171. [2021-04-15 02:16:30,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7171 states, 7170 states have (on average 3.6553695955369596) internal successors, (26209), 7170 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 26209 transitions. [2021-04-15 02:16:30,467 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 26209 transitions. Word has length 25 [2021-04-15 02:16:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:30,467 INFO L480 AbstractCegarLoop]: Abstraction has 7171 states and 26209 transitions. [2021-04-15 02:16:30,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 26209 transitions. [2021-04-15 02:16:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:30,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:30,479 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:30,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 02:16:30,680 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:30,680 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 36 times [2021-04-15 02:16:30,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:30,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640355963] [2021-04-15 02:16:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640355963] [2021-04-15 02:16:30,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661929936] [2021-04-15 02:16:30,719 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 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 [2021-04-15 02:16:30,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:16:30,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:30,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:30,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:30,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:30,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:30,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908041114] [2021-04-15 02:16:30,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:30,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:30,879 INFO L87 Difference]: Start difference. First operand 7171 states and 26209 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:16:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:32,576 INFO L93 Difference]: Finished difference Result 11413 states and 38133 transitions. [2021-04-15 02:16:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 02:16:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 [2021-04-15 02:16:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:32,607 INFO L225 Difference]: With dead ends: 11413 [2021-04-15 02:16:32,607 INFO L226 Difference]: Without dead ends: 11401 [2021-04-15 02:16:32,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 1201.5ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 02:16:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11401 states. [2021-04-15 02:16:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 6870. [2021-04-15 02:16:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 3.6622506915125927) internal successors, (25156), 6869 states have internal predecessors, (25156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 25156 transitions. [2021-04-15 02:16:32,821 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 25156 transitions. Word has length 25 [2021-04-15 02:16:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:32,821 INFO L480 AbstractCegarLoop]: Abstraction has 6870 states and 25156 transitions. [2021-04-15 02:16:32,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:16:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 25156 transitions. [2021-04-15 02:16:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:32,836 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:32,837 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:33,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:33,037 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash -198895582, now seen corresponding path program 37 times [2021-04-15 02:16:33,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:33,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332001162] [2021-04-15 02:16:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332001162] [2021-04-15 02:16:33,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762579876] [2021-04-15 02:16:33,085 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 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 [2021-04-15 02:16:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:33,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:33,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:33,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:33,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170806548] [2021-04-15 02:16:33,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:33,269 INFO L87 Difference]: Start difference. First operand 6870 states and 25156 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:34,363 INFO L93 Difference]: Finished difference Result 10327 states and 35183 transitions. [2021-04-15 02:16:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:16:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:34,391 INFO L225 Difference]: With dead ends: 10327 [2021-04-15 02:16:34,391 INFO L226 Difference]: Without dead ends: 10249 [2021-04-15 02:16:34,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 839.5ms TimeCoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:16:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-04-15 02:16:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 7154. [2021-04-15 02:16:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7153 states have (on average 3.6648958478959877) internal successors, (26215), 7153 states have internal predecessors, (26215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 26215 transitions. [2021-04-15 02:16:34,606 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 26215 transitions. Word has length 25 [2021-04-15 02:16:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:34,606 INFO L480 AbstractCegarLoop]: Abstraction has 7154 states and 26215 transitions. [2021-04-15 02:16:34,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 26215 transitions. [2021-04-15 02:16:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:34,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:34,619 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:34,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:34,820 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1767836446, now seen corresponding path program 38 times [2021-04-15 02:16:34,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:34,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505872045] [2021-04-15 02:16:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505872045] [2021-04-15 02:16:34,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137027218] [2021-04-15 02:16:34,875 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 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 [2021-04-15 02:16:34,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:34,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:35,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:35,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:35,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138030130] [2021-04-15 02:16:35,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:35,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:35,054 INFO L87 Difference]: Start difference. First operand 7154 states and 26215 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:36,421 INFO L93 Difference]: Finished difference Result 10534 states and 35817 transitions. [2021-04-15 02:16:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 02:16:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:36,443 INFO L225 Difference]: With dead ends: 10534 [2021-04-15 02:16:36,443 INFO L226 Difference]: Without dead ends: 10429 [2021-04-15 02:16:36,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1006.0ms TimeCoverageRelationStatistics Valid=946, Invalid=2836, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 02:16:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10429 states. [2021-04-15 02:16:36,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10429 to 7613. [2021-04-15 02:16:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7613 states, 7612 states have (on average 3.6342616920651603) internal successors, (27664), 7612 states have internal predecessors, (27664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7613 states to 7613 states and 27664 transitions. [2021-04-15 02:16:36,648 INFO L78 Accepts]: Start accepts. Automaton has 7613 states and 27664 transitions. Word has length 25 [2021-04-15 02:16:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:36,648 INFO L480 AbstractCegarLoop]: Abstraction has 7613 states and 27664 transitions. [2021-04-15 02:16:36,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 7613 states and 27664 transitions. [2021-04-15 02:16:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:36,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:36,662 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:36,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:36,863 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1334664418, now seen corresponding path program 39 times [2021-04-15 02:16:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:36,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85918585] [2021-04-15 02:16:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85918585] [2021-04-15 02:16:36,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418909914] [2021-04-15 02:16:36,906 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 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 [2021-04-15 02:16:36,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:16:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:37,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:37,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:37,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689742030] [2021-04-15 02:16:37,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:37,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:37,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:37,120 INFO L87 Difference]: Start difference. First operand 7613 states and 27664 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:38,632 INFO L93 Difference]: Finished difference Result 11692 states and 39223 transitions. [2021-04-15 02:16:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 02:16:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:16:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:38,653 INFO L225 Difference]: With dead ends: 11692 [2021-04-15 02:16:38,654 INFO L226 Difference]: Without dead ends: 11650 [2021-04-15 02:16:38,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1141.9ms TimeCoverageRelationStatistics Valid=1316, Invalid=3654, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 02:16:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11650 states. [2021-04-15 02:16:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11650 to 8222. [2021-04-15 02:16:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8222 states, 8221 states have (on average 3.6144021408587763) internal successors, (29714), 8221 states have internal predecessors, (29714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8222 states to 8222 states and 29714 transitions. [2021-04-15 02:16:38,847 INFO L78 Accepts]: Start accepts. Automaton has 8222 states and 29714 transitions. Word has length 25 [2021-04-15 02:16:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:38,847 INFO L480 AbstractCegarLoop]: Abstraction has 8222 states and 29714 transitions. [2021-04-15 02:16:38,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:16:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 8222 states and 29714 transitions. [2021-04-15 02:16:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:38,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:38,861 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:39,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:39,062 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash -230069726, now seen corresponding path program 40 times [2021-04-15 02:16:39,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:39,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173969748] [2021-04-15 02:16:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:39,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173969748] [2021-04-15 02:16:39,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100305385] [2021-04-15 02:16:39,110 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 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 [2021-04-15 02:16:39,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:16:39,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:39,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:39,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:39,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:39,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518219789] [2021-04-15 02:16:39,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:39,308 INFO L87 Difference]: Start difference. First operand 8222 states and 29714 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:16:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:41,567 INFO L93 Difference]: Finished difference Result 11897 states and 39696 transitions. [2021-04-15 02:16:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 02:16:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:16:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:41,595 INFO L225 Difference]: With dead ends: 11897 [2021-04-15 02:16:41,595 INFO L226 Difference]: Without dead ends: 11897 [2021-04-15 02:16:41,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1737.1ms TimeCoverageRelationStatistics Valid=2040, Invalid=5442, Unknown=0, NotChecked=0, Total=7482 [2021-04-15 02:16:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11897 states. [2021-04-15 02:16:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11897 to 7931. [2021-04-15 02:16:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.626860025220681) internal successors, (28761), 7930 states have internal predecessors, (28761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 28761 transitions. [2021-04-15 02:16:41,823 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 28761 transitions. Word has length 25 [2021-04-15 02:16:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:41,823 INFO L480 AbstractCegarLoop]: Abstraction has 7931 states and 28761 transitions. [2021-04-15 02:16:41,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:16:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 28761 transitions. [2021-04-15 02:16:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:41,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:41,839 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:42,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-04-15 02:16:42,039 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 41 times [2021-04-15 02:16:42,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:42,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647193276] [2021-04-15 02:16:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647193276] [2021-04-15 02:16:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841954639] [2021-04-15 02:16:42,101 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 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 [2021-04-15 02:16:42,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:16:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:42,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:42,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:42,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419008545] [2021-04-15 02:16:42,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:42,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:42,322 INFO L87 Difference]: Start difference. First operand 7931 states and 28761 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:45,050 INFO L93 Difference]: Finished difference Result 11453 states and 39005 transitions. [2021-04-15 02:16:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-04-15 02:16:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:16:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:45,083 INFO L225 Difference]: With dead ends: 11453 [2021-04-15 02:16:45,083 INFO L226 Difference]: Without dead ends: 11453 [2021-04-15 02:16:45,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 2083.5ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 02:16:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11453 states. [2021-04-15 02:16:45,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11453 to 8073. [2021-04-15 02:16:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.632185332011893) internal successors, (29319), 8072 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 29319 transitions. [2021-04-15 02:16:45,339 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 29319 transitions. Word has length 25 [2021-04-15 02:16:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:45,340 INFO L480 AbstractCegarLoop]: Abstraction has 8073 states and 29319 transitions. [2021-04-15 02:16:45,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:16:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 29319 transitions. [2021-04-15 02:16:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:45,356 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:45,356 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:45,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:45,557 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 42 times [2021-04-15 02:16:45,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:45,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142215745] [2021-04-15 02:16:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:45,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142215745] [2021-04-15 02:16:45,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846661068] [2021-04-15 02:16:45,603 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 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 [2021-04-15 02:16:45,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:16:45,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:45,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:45,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:45,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:45,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001098216] [2021-04-15 02:16:45,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:45,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:45,794 INFO L87 Difference]: Start difference. First operand 8073 states and 29319 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:47,135 INFO L93 Difference]: Finished difference Result 10292 states and 35448 transitions. [2021-04-15 02:16:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:16:47,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:47,155 INFO L225 Difference]: With dead ends: 10292 [2021-04-15 02:16:47,155 INFO L226 Difference]: Without dead ends: 10278 [2021-04-15 02:16:47,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:16:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-04-15 02:16:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 8045. [2021-04-15 02:16:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.6301591248135257) internal successors, (29201), 8044 states have internal predecessors, (29201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 29201 transitions. [2021-04-15 02:16:47,328 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 29201 transitions. Word has length 25 [2021-04-15 02:16:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:47,328 INFO L480 AbstractCegarLoop]: Abstraction has 8045 states and 29201 transitions. [2021-04-15 02:16:47,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 29201 transitions. [2021-04-15 02:16:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:47,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:47,341 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:47,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:47,541 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 43 times [2021-04-15 02:16:47,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:47,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362833508] [2021-04-15 02:16:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:47,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362833508] [2021-04-15 02:16:47,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845685145] [2021-04-15 02:16:47,585 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 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 [2021-04-15 02:16:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:47,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:47,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:47,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481355819] [2021-04-15 02:16:47,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:47,735 INFO L87 Difference]: Start difference. First operand 8045 states and 29201 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:48,787 INFO L93 Difference]: Finished difference Result 10084 states and 34890 transitions. [2021-04-15 02:16:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 02:16:48,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:48,808 INFO L225 Difference]: With dead ends: 10084 [2021-04-15 02:16:48,808 INFO L226 Difference]: Without dead ends: 10042 [2021-04-15 02:16:48,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 750.5ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:16:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10042 states. [2021-04-15 02:16:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10042 to 8045. [2021-04-15 02:16:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.6227001491795128) internal successors, (29141), 8044 states have internal predecessors, (29141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 29141 transitions. [2021-04-15 02:16:48,978 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 29141 transitions. Word has length 25 [2021-04-15 02:16:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:48,978 INFO L480 AbstractCegarLoop]: Abstraction has 8045 states and 29141 transitions. [2021-04-15 02:16:48,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 29141 transitions. [2021-04-15 02:16:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:48,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:48,990 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:49,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 02:16:49,191 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:49,191 INFO L82 PathProgramCache]: Analyzing trace with hash -973619432, now seen corresponding path program 44 times [2021-04-15 02:16:49,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:49,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408183633] [2021-04-15 02:16:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408183633] [2021-04-15 02:16:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646440219] [2021-04-15 02:16:49,228 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 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 [2021-04-15 02:16:49,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:49,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:16:49,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:49,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:49,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:16:49,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001983304] [2021-04-15 02:16:49,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:16:49,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:16:49,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:16:49,320 INFO L87 Difference]: Start difference. First operand 8045 states and 29141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 02:16:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:49,621 INFO L93 Difference]: Finished difference Result 18209 states and 62511 transitions. [2021-04-15 02:16:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:16:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 [2021-04-15 02:16:49,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:49,656 INFO L225 Difference]: With dead ends: 18209 [2021-04-15 02:16:49,656 INFO L226 Difference]: Without dead ends: 18202 [2021-04-15 02:16:49,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:16:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-04-15 02:16:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 10877. [2021-04-15 02:16:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10877 states, 10876 states have (on average 3.713313718278779) internal successors, (40386), 10876 states have internal predecessors, (40386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10877 states to 10877 states and 40386 transitions. [2021-04-15 02:16:49,968 INFO L78 Accepts]: Start accepts. Automaton has 10877 states and 40386 transitions. Word has length 25 [2021-04-15 02:16:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:49,969 INFO L480 AbstractCegarLoop]: Abstraction has 10877 states and 40386 transitions. [2021-04-15 02:16:49,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 02:16:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10877 states and 40386 transitions. [2021-04-15 02:16:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:49,988 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:49,988 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:50,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:50,189 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -487815328, now seen corresponding path program 45 times [2021-04-15 02:16:50,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:50,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169710093] [2021-04-15 02:16:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:50,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169710093] [2021-04-15 02:16:50,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832833661] [2021-04-15 02:16:50,224 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 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 [2021-04-15 02:16:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:16:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:16:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:16:50,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:50,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 02:16:50,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539344053] [2021-04-15 02:16:50,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:16:50,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:50,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:16:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:16:50,319 INFO L87 Difference]: Start difference. First operand 10877 states and 40386 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:16:50,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:50,623 INFO L93 Difference]: Finished difference Result 15076 states and 52663 transitions. [2021-04-15 02:16:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:16:50,624 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 [2021-04-15 02:16:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:50,661 INFO L225 Difference]: With dead ends: 15076 [2021-04-15 02:16:50,661 INFO L226 Difference]: Without dead ends: 15062 [2021-04-15 02:16:50,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:16:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15062 states. [2021-04-15 02:16:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15062 to 10165. [2021-04-15 02:16:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10165 states, 10164 states have (on average 3.6990358126721765) internal successors, (37597), 10164 states have internal predecessors, (37597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 37597 transitions. [2021-04-15 02:16:50,973 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 37597 transitions. Word has length 25 [2021-04-15 02:16:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:50,973 INFO L480 AbstractCegarLoop]: Abstraction has 10165 states and 37597 transitions. [2021-04-15 02:16:50,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:16:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 37597 transitions. [2021-04-15 02:16:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:50,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:50,991 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:51,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-04-15 02:16:51,192 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:51,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1124282182, now seen corresponding path program 46 times [2021-04-15 02:16:51,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:51,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961276751] [2021-04-15 02:16:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:51,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961276751] [2021-04-15 02:16:51,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29505744] [2021-04-15 02:16:51,257 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:51,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:16:51,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:16:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:51,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:51,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 02:16:51,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398826661] [2021-04-15 02:16:51,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:16:51,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:51,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:16:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:16:51,363 INFO L87 Difference]: Start difference. First operand 10165 states and 37597 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-04-15 02:16:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:51,695 INFO L93 Difference]: Finished difference Result 14216 states and 49460 transitions. [2021-04-15 02:16:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:16:51,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 [2021-04-15 02:16:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:51,736 INFO L225 Difference]: With dead ends: 14216 [2021-04-15 02:16:51,736 INFO L226 Difference]: Without dead ends: 14194 [2021-04-15 02:16:51,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:16:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14194 states. [2021-04-15 02:16:51,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14194 to 8955. [2021-04-15 02:16:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8955 states, 8954 states have (on average 3.668528032164396) internal successors, (32848), 8954 states have internal predecessors, (32848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8955 states to 8955 states and 32848 transitions. [2021-04-15 02:16:51,992 INFO L78 Accepts]: Start accepts. Automaton has 8955 states and 32848 transitions. Word has length 25 [2021-04-15 02:16:51,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:51,992 INFO L480 AbstractCegarLoop]: Abstraction has 8955 states and 32848 transitions. [2021-04-15 02:16:51,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-04-15 02:16:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8955 states and 32848 transitions. [2021-04-15 02:16:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:52,010 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:52,010 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:52,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:52,212 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 22 times [2021-04-15 02:16:52,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:52,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505308426] [2021-04-15 02:16:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:52,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505308426] [2021-04-15 02:16:52,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238709655] [2021-04-15 02:16:52,279 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:52,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:16:52,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:52,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:52,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:52,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376795450] [2021-04-15 02:16:52,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:52,491 INFO L87 Difference]: Start difference. First operand 8955 states and 32848 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:16:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:53,658 INFO L93 Difference]: Finished difference Result 9639 states and 34552 transitions. [2021-04-15 02:16:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:16:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:16:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:53,685 INFO L225 Difference]: With dead ends: 9639 [2021-04-15 02:16:53,685 INFO L226 Difference]: Without dead ends: 9635 [2021-04-15 02:16:53,685 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:16:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-04-15 02:16:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 9003. [2021-04-15 02:16:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 3.6654076871806267) internal successors, (32996), 9002 states have internal predecessors, (32996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 32996 transitions. [2021-04-15 02:16:53,880 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 32996 transitions. Word has length 25 [2021-04-15 02:16:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:53,880 INFO L480 AbstractCegarLoop]: Abstraction has 9003 states and 32996 transitions. [2021-04-15 02:16:53,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:16:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 32996 transitions. [2021-04-15 02:16:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:53,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:53,899 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:54,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-04-15 02:16:54,100 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 23 times [2021-04-15 02:16:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:54,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540877044] [2021-04-15 02:16:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540877044] [2021-04-15 02:16:54,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923618526] [2021-04-15 02:16:54,179 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 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 [2021-04-15 02:16:54,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:16:54,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:16:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:54,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:54,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 02:16:54,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445522237] [2021-04-15 02:16:54,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:54,337 INFO L87 Difference]: Start difference. First operand 9003 states and 32996 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:55,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:55,265 INFO L93 Difference]: Finished difference Result 21111 states and 74093 transitions. [2021-04-15 02:16:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:16:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:55,322 INFO L225 Difference]: With dead ends: 21111 [2021-04-15 02:16:55,322 INFO L226 Difference]: Without dead ends: 21095 [2021-04-15 02:16:55,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:16:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21095 states. [2021-04-15 02:16:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21095 to 10207. [2021-04-15 02:16:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.700862237899275) internal successors, (37771), 10206 states have internal predecessors, (37771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 37771 transitions. [2021-04-15 02:16:55,652 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 37771 transitions. Word has length 25 [2021-04-15 02:16:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:55,652 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 37771 transitions. [2021-04-15 02:16:55,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 37771 transitions. [2021-04-15 02:16:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:55,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:55,678 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:55,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:55,879 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 24 times [2021-04-15 02:16:55,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:55,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597222415] [2021-04-15 02:16:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597222415] [2021-04-15 02:16:55,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164261021] [2021-04-15 02:16:55,945 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:16:55,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:16:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:55,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:16:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:56,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:56,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:16:56,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119243300] [2021-04-15 02:16:56,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:16:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:16:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:16:56,154 INFO L87 Difference]: Start difference. First operand 10207 states and 37771 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:16:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:57,126 INFO L93 Difference]: Finished difference Result 25646 states and 89918 transitions. [2021-04-15 02:16:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:16:57,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:16:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:57,196 INFO L225 Difference]: With dead ends: 25646 [2021-04-15 02:16:57,196 INFO L226 Difference]: Without dead ends: 25618 [2021-04-15 02:16:57,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:16:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25618 states. [2021-04-15 02:16:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25618 to 12139. [2021-04-15 02:16:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12139 states, 12138 states have (on average 3.709342560553633) internal successors, (45024), 12138 states have internal predecessors, (45024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:57,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12139 states to 12139 states and 45024 transitions. [2021-04-15 02:16:57,580 INFO L78 Accepts]: Start accepts. Automaton has 12139 states and 45024 transitions. Word has length 25 [2021-04-15 02:16:57,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:57,580 INFO L480 AbstractCegarLoop]: Abstraction has 12139 states and 45024 transitions. [2021-04-15 02:16:57,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:16:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 12139 states and 45024 transitions. [2021-04-15 02:16:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:57,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:57,598 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:57,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-04-15 02:16:57,798 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:57,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:57,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 25 times [2021-04-15 02:16:57,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:57,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007291446] [2021-04-15 02:16:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:57,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007291446] [2021-04-15 02:16:57,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319843226] [2021-04-15 02:16:57,842 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 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 [2021-04-15 02:16:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:57,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:58,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:58,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:16:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115155868] [2021-04-15 02:16:58,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:16:58,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:16:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:16:58,149 INFO L87 Difference]: Start difference. First operand 12139 states and 45024 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:16:59,089 INFO L93 Difference]: Finished difference Result 12705 states and 46419 transitions. [2021-04-15 02:16:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:16:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:16:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:16:59,125 INFO L225 Difference]: With dead ends: 12705 [2021-04-15 02:16:59,125 INFO L226 Difference]: Without dead ends: 12698 [2021-04-15 02:16:59,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:16:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12698 states. [2021-04-15 02:16:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12698 to 12117. [2021-04-15 02:16:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12117 states, 12116 states have (on average 3.710052822713767) internal successors, (44951), 12116 states have internal predecessors, (44951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:16:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12117 states to 12117 states and 44951 transitions. [2021-04-15 02:16:59,381 INFO L78 Accepts]: Start accepts. Automaton has 12117 states and 44951 transitions. Word has length 25 [2021-04-15 02:16:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:16:59,382 INFO L480 AbstractCegarLoop]: Abstraction has 12117 states and 44951 transitions. [2021-04-15 02:16:59,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:16:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 12117 states and 44951 transitions. [2021-04-15 02:16:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:16:59,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:16:59,401 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:16:59,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:16:59,602 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:16:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:16:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 26 times [2021-04-15 02:16:59,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:16:59,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070592297] [2021-04-15 02:16:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:16:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:16:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:59,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070592297] [2021-04-15 02:16:59,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591878656] [2021-04-15 02:16:59,654 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 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 [2021-04-15 02:16:59,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:16:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:16:59,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:16:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:16:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:16:59,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:16:59,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:16:59,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5153495] [2021-04-15 02:16:59,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:16:59,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:16:59,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:16:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:16:59,822 INFO L87 Difference]: Start difference. First operand 12117 states and 44951 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:00,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:00,694 INFO L93 Difference]: Finished difference Result 12951 states and 47049 transitions. [2021-04-15 02:17:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:17:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:17:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:00,732 INFO L225 Difference]: With dead ends: 12951 [2021-04-15 02:17:00,732 INFO L226 Difference]: Without dead ends: 12909 [2021-04-15 02:17:00,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:17:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-04-15 02:17:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 12231. [2021-04-15 02:17:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12231 states, 12230 states have (on average 3.7036794766966477) internal successors, (45296), 12230 states have internal predecessors, (45296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 45296 transitions. [2021-04-15 02:17:01,004 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 45296 transitions. Word has length 25 [2021-04-15 02:17:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:01,005 INFO L480 AbstractCegarLoop]: Abstraction has 12231 states and 45296 transitions. [2021-04-15 02:17:01,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 45296 transitions. [2021-04-15 02:17:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:01,126 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:01,126 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:01,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:01,329 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:01,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 27 times [2021-04-15 02:17:01,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:01,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419415108] [2021-04-15 02:17:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419415108] [2021-04-15 02:17:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310804182] [2021-04-15 02:17:01,389 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 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 [2021-04-15 02:17:01,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:17:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:01,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:01,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 02:17:01,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400992595] [2021-04-15 02:17:01,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:17:01,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:17:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:17:01,570 INFO L87 Difference]: Start difference. First operand 12231 states and 45296 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:17:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:02,427 INFO L93 Difference]: Finished difference Result 16039 states and 57612 transitions. [2021-04-15 02:17:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:17:02,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 [2021-04-15 02:17:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:02,480 INFO L225 Difference]: With dead ends: 16039 [2021-04-15 02:17:02,480 INFO L226 Difference]: Without dead ends: 16018 [2021-04-15 02:17:02,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:17:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16018 states. [2021-04-15 02:17:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16018 to 12188. [2021-04-15 02:17:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12188 states, 12187 states have (on average 3.704767375071798) internal successors, (45150), 12187 states have internal predecessors, (45150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:02,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12188 states to 12188 states and 45150 transitions. [2021-04-15 02:17:02,813 INFO L78 Accepts]: Start accepts. Automaton has 12188 states and 45150 transitions. Word has length 25 [2021-04-15 02:17:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:02,813 INFO L480 AbstractCegarLoop]: Abstraction has 12188 states and 45150 transitions. [2021-04-15 02:17:02,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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) [2021-04-15 02:17:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 12188 states and 45150 transitions. [2021-04-15 02:17:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:02,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:02,840 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:03,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:03,040 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 28 times [2021-04-15 02:17:03,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:03,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477914834] [2021-04-15 02:17:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477914834] [2021-04-15 02:17:03,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129992364] [2021-04-15 02:17:03,112 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:17:03,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:17:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:03,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:03,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:03,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476880696] [2021-04-15 02:17:03,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:03,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:03,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:03,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:03,336 INFO L87 Difference]: Start difference. First operand 12188 states and 45150 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:03,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:03,946 INFO L93 Difference]: Finished difference Result 12816 states and 46753 transitions. [2021-04-15 02:17:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:17:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:17:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:03,985 INFO L225 Difference]: With dead ends: 12816 [2021-04-15 02:17:03,985 INFO L226 Difference]: Without dead ends: 12777 [2021-04-15 02:17:03,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:17:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12777 states. [2021-04-15 02:17:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12777 to 12192. [2021-04-15 02:17:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12192 states, 12191 states have (on average 3.705028299565253) internal successors, (45168), 12191 states have internal predecessors, (45168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12192 states to 12192 states and 45168 transitions. [2021-04-15 02:17:04,278 INFO L78 Accepts]: Start accepts. Automaton has 12192 states and 45168 transitions. Word has length 25 [2021-04-15 02:17:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:04,278 INFO L480 AbstractCegarLoop]: Abstraction has 12192 states and 45168 transitions. [2021-04-15 02:17:04,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 12192 states and 45168 transitions. [2021-04-15 02:17:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:04,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:04,304 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:04,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:04,509 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 29 times [2021-04-15 02:17:04,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:04,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895587609] [2021-04-15 02:17:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:04,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895587609] [2021-04-15 02:17:04,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310481655] [2021-04-15 02:17:04,558 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 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 [2021-04-15 02:17:04,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:17:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:04,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:04,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412683208] [2021-04-15 02:17:04,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:04,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:04,722 INFO L87 Difference]: Start difference. First operand 12192 states and 45168 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:05,300 INFO L93 Difference]: Finished difference Result 15059 states and 54452 transitions. [2021-04-15 02:17:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:17:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:05,339 INFO L225 Difference]: With dead ends: 15059 [2021-04-15 02:17:05,339 INFO L226 Difference]: Without dead ends: 15038 [2021-04-15 02:17:05,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:17:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15038 states. [2021-04-15 02:17:05,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15038 to 12223. [2021-04-15 02:17:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12223 states, 12222 states have (on average 3.7051219113074785) internal successors, (45284), 12222 states have internal predecessors, (45284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12223 states to 12223 states and 45284 transitions. [2021-04-15 02:17:05,609 INFO L78 Accepts]: Start accepts. Automaton has 12223 states and 45284 transitions. Word has length 25 [2021-04-15 02:17:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:05,609 INFO L480 AbstractCegarLoop]: Abstraction has 12223 states and 45284 transitions. [2021-04-15 02:17:05,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 12223 states and 45284 transitions. [2021-04-15 02:17:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:05,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:05,632 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:05,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 02:17:05,832 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 30 times [2021-04-15 02:17:05,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:05,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248847933] [2021-04-15 02:17:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:05,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248847933] [2021-04-15 02:17:05,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410527559] [2021-04-15 02:17:05,889 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 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 [2021-04-15 02:17:05,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:17:05,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689362844] [2021-04-15 02:17:06,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:06,044 INFO L87 Difference]: Start difference. First operand 12223 states and 45284 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:07,477 INFO L93 Difference]: Finished difference Result 19890 states and 68893 transitions. [2021-04-15 02:17:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:17:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:07,525 INFO L225 Difference]: With dead ends: 19890 [2021-04-15 02:17:07,525 INFO L226 Difference]: Without dead ends: 19820 [2021-04-15 02:17:07,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:17:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19820 states. [2021-04-15 02:17:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19820 to 12409. [2021-04-15 02:17:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12409 states, 12408 states have (on average 3.700354609929078) internal successors, (45914), 12408 states have internal predecessors, (45914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12409 states to 12409 states and 45914 transitions. [2021-04-15 02:17:07,845 INFO L78 Accepts]: Start accepts. Automaton has 12409 states and 45914 transitions. Word has length 25 [2021-04-15 02:17:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:07,845 INFO L480 AbstractCegarLoop]: Abstraction has 12409 states and 45914 transitions. [2021-04-15 02:17:07,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 12409 states and 45914 transitions. [2021-04-15 02:17:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:07,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:07,866 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:08,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:08,066 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 31 times [2021-04-15 02:17:08,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:08,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830570662] [2021-04-15 02:17:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830570662] [2021-04-15 02:17:08,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209630392] [2021-04-15 02:17:08,207 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 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 [2021-04-15 02:17:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:08,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:08,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:08,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680911546] [2021-04-15 02:17:08,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:08,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:08,367 INFO L87 Difference]: Start difference. First operand 12409 states and 45914 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:09,943 INFO L93 Difference]: Finished difference Result 13776 states and 49426 transitions. [2021-04-15 02:17:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:17:09,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:17:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:09,985 INFO L225 Difference]: With dead ends: 13776 [2021-04-15 02:17:09,985 INFO L226 Difference]: Without dead ends: 13772 [2021-04-15 02:17:09,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:17:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2021-04-15 02:17:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 12464. [2021-04-15 02:17:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12464 states, 12463 states have (on average 3.698146513680494) internal successors, (46090), 12463 states have internal predecessors, (46090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12464 states to 12464 states and 46090 transitions. [2021-04-15 02:17:10,322 INFO L78 Accepts]: Start accepts. Automaton has 12464 states and 46090 transitions. Word has length 25 [2021-04-15 02:17:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:10,322 INFO L480 AbstractCegarLoop]: Abstraction has 12464 states and 46090 transitions. [2021-04-15 02:17:10,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12464 states and 46090 transitions. [2021-04-15 02:17:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:10,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:10,350 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:10,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 02:17:10,551 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 32 times [2021-04-15 02:17:10,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:10,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997324665] [2021-04-15 02:17:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:10,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997324665] [2021-04-15 02:17:10,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272925703] [2021-04-15 02:17:10,598 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:10,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:17:10,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:10,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:10,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:10,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:17:10,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025969954] [2021-04-15 02:17:10,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:17:10,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:17:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:17:10,834 INFO L87 Difference]: Start difference. First operand 12464 states and 46090 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:17:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:12,167 INFO L93 Difference]: Finished difference Result 13407 states and 48527 transitions. [2021-04-15 02:17:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:17:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:17:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:12,205 INFO L225 Difference]: With dead ends: 13407 [2021-04-15 02:17:12,205 INFO L226 Difference]: Without dead ends: 13386 [2021-04-15 02:17:12,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 954.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:17:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2021-04-15 02:17:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 12326. [2021-04-15 02:17:12,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12326 states, 12325 states have (on average 3.7058823529411766) internal successors, (45675), 12325 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12326 states to 12326 states and 45675 transitions. [2021-04-15 02:17:12,579 INFO L78 Accepts]: Start accepts. Automaton has 12326 states and 45675 transitions. Word has length 25 [2021-04-15 02:17:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:12,579 INFO L480 AbstractCegarLoop]: Abstraction has 12326 states and 45675 transitions. [2021-04-15 02:17:12,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:17:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 12326 states and 45675 transitions. [2021-04-15 02:17:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:12,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:12,603 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:12,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 02:17:12,804 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 33 times [2021-04-15 02:17:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:12,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286085912] [2021-04-15 02:17:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:12,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286085912] [2021-04-15 02:17:12,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178280135] [2021-04-15 02:17:12,872 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 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 [2021-04-15 02:17:12,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:17:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99408627] [2021-04-15 02:17:13,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:13,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:13,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:13,146 INFO L87 Difference]: Start difference. First operand 12326 states and 45675 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:14,306 INFO L93 Difference]: Finished difference Result 13626 states and 49095 transitions. [2021-04-15 02:17:14,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:17:14,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:17:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:14,337 INFO L225 Difference]: With dead ends: 13626 [2021-04-15 02:17:14,337 INFO L226 Difference]: Without dead ends: 13563 [2021-04-15 02:17:14,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 859.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:17:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13563 states. [2021-04-15 02:17:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13563 to 12450. [2021-04-15 02:17:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12450 states, 12449 states have (on average 3.696441481243473) internal successors, (46017), 12449 states have internal predecessors, (46017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12450 states to 12450 states and 46017 transitions. [2021-04-15 02:17:14,581 INFO L78 Accepts]: Start accepts. Automaton has 12450 states and 46017 transitions. Word has length 25 [2021-04-15 02:17:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:14,581 INFO L480 AbstractCegarLoop]: Abstraction has 12450 states and 46017 transitions. [2021-04-15 02:17:14,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12450 states and 46017 transitions. [2021-04-15 02:17:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:14,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:14,602 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:14,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 02:17:14,802 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:14,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 34 times [2021-04-15 02:17:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:14,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915909986] [2021-04-15 02:17:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915909986] [2021-04-15 02:17:14,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439886913] [2021-04-15 02:17:14,863 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:14,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:17:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:14,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:15,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021738562] [2021-04-15 02:17:15,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:15,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:15,039 INFO L87 Difference]: Start difference. First operand 12450 states and 46017 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:16,115 INFO L93 Difference]: Finished difference Result 26665 states and 93712 transitions. [2021-04-15 02:17:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:17:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:16,191 INFO L225 Difference]: With dead ends: 26665 [2021-04-15 02:17:16,192 INFO L226 Difference]: Without dead ends: 26651 [2021-04-15 02:17:16,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 704.6ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:17:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2021-04-15 02:17:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 14569. [2021-04-15 02:17:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14569 states, 14568 states have (on average 3.7305738605161998) internal successors, (54347), 14568 states have internal predecessors, (54347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14569 states to 14569 states and 54347 transitions. [2021-04-15 02:17:16,656 INFO L78 Accepts]: Start accepts. Automaton has 14569 states and 54347 transitions. Word has length 25 [2021-04-15 02:17:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:16,656 INFO L480 AbstractCegarLoop]: Abstraction has 14569 states and 54347 transitions. [2021-04-15 02:17:16,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 14569 states and 54347 transitions. [2021-04-15 02:17:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:16,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:16,681 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:16,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 02:17:16,881 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 35 times [2021-04-15 02:17:16,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:16,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094431762] [2021-04-15 02:17:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094431762] [2021-04-15 02:17:16,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027699687] [2021-04-15 02:17:16,934 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 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 [2021-04-15 02:17:16,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:17:16,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:17,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:17,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827239430] [2021-04-15 02:17:17,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:17,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:17,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:17,107 INFO L87 Difference]: Start difference. First operand 14569 states and 54347 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:18,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:18,573 INFO L93 Difference]: Finished difference Result 16521 states and 59949 transitions. [2021-04-15 02:17:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:17:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:17:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:18,619 INFO L225 Difference]: With dead ends: 16521 [2021-04-15 02:17:18,619 INFO L226 Difference]: Without dead ends: 16517 [2021-04-15 02:17:18,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:17:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16517 states. [2021-04-15 02:17:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16517 to 14783. [2021-04-15 02:17:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14783 states, 14782 states have (on average 3.7296035719117846) internal successors, (55131), 14782 states have internal predecessors, (55131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14783 states to 14783 states and 55131 transitions. [2021-04-15 02:17:18,966 INFO L78 Accepts]: Start accepts. Automaton has 14783 states and 55131 transitions. Word has length 25 [2021-04-15 02:17:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:18,967 INFO L480 AbstractCegarLoop]: Abstraction has 14783 states and 55131 transitions. [2021-04-15 02:17:18,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 14783 states and 55131 transitions. [2021-04-15 02:17:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:18,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:18,995 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:19,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:19,195 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:19,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 36 times [2021-04-15 02:17:19,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:19,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119186841] [2021-04-15 02:17:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:19,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119186841] [2021-04-15 02:17:19,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51716355] [2021-04-15 02:17:19,274 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 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 [2021-04-15 02:17:19,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:17:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:19,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:19,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:19,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668951221] [2021-04-15 02:17:19,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:19,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:19,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:19,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:19,492 INFO L87 Difference]: Start difference. First operand 14783 states and 55131 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:21,631 INFO L93 Difference]: Finished difference Result 17102 states and 61433 transitions. [2021-04-15 02:17:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 02:17:21,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:17:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:21,679 INFO L225 Difference]: With dead ends: 17102 [2021-04-15 02:17:21,679 INFO L226 Difference]: Without dead ends: 17098 [2021-04-15 02:17:21,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1491.8ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 02:17:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17098 states. [2021-04-15 02:17:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17098 to 14919. [2021-04-15 02:17:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14919 states, 14918 states have (on average 3.7264378603029895) internal successors, (55591), 14918 states have internal predecessors, (55591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14919 states to 14919 states and 55591 transitions. [2021-04-15 02:17:22,076 INFO L78 Accepts]: Start accepts. Automaton has 14919 states and 55591 transitions. Word has length 25 [2021-04-15 02:17:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:22,076 INFO L480 AbstractCegarLoop]: Abstraction has 14919 states and 55591 transitions. [2021-04-15 02:17:22,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14919 states and 55591 transitions. [2021-04-15 02:17:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:22,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:22,107 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:22,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:22,308 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 37 times [2021-04-15 02:17:22,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:22,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299445345] [2021-04-15 02:17:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:22,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299445345] [2021-04-15 02:17:22,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310709518] [2021-04-15 02:17:22,373 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:17:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:22,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:22,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:22,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:22,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512084322] [2021-04-15 02:17:22,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:22,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:22,634 INFO L87 Difference]: Start difference. First operand 14919 states and 55591 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:24,219 INFO L93 Difference]: Finished difference Result 16756 states and 60539 transitions. [2021-04-15 02:17:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 02:17:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:17:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:24,265 INFO L225 Difference]: With dead ends: 16756 [2021-04-15 02:17:24,265 INFO L226 Difference]: Without dead ends: 16735 [2021-04-15 02:17:24,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1098.6ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 02:17:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16735 states. [2021-04-15 02:17:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16735 to 14809. [2021-04-15 02:17:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 3.7282549972987575) internal successors, (55208), 14808 states have internal predecessors, (55208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 55208 transitions. [2021-04-15 02:17:24,590 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 55208 transitions. Word has length 25 [2021-04-15 02:17:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:24,591 INFO L480 AbstractCegarLoop]: Abstraction has 14809 states and 55208 transitions. [2021-04-15 02:17:24,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:17:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 55208 transitions. [2021-04-15 02:17:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:24,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:24,617 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:24,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-15 02:17:24,817 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 38 times [2021-04-15 02:17:24,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:24,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905593624] [2021-04-15 02:17:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905593624] [2021-04-15 02:17:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228628773] [2021-04-15 02:17:24,872 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:17:24,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:17:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:17:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:25,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:25,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:17:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206352553] [2021-04-15 02:17:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:17:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:17:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:17:25,085 INFO L87 Difference]: Start difference. First operand 14809 states and 55208 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:26,590 INFO L93 Difference]: Finished difference Result 18149 states and 65122 transitions. [2021-04-15 02:17:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 02:17:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:17:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:26,628 INFO L225 Difference]: With dead ends: 18149 [2021-04-15 02:17:26,628 INFO L226 Difference]: Without dead ends: 18145 [2021-04-15 02:17:26,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1053.2ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 02:17:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18145 states. [2021-04-15 02:17:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18145 to 14779. [2021-04-15 02:17:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.7307484097983488) internal successors, (55133), 14778 states have internal predecessors, (55133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 55133 transitions. [2021-04-15 02:17:26,934 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 55133 transitions. Word has length 25 [2021-04-15 02:17:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:26,934 INFO L480 AbstractCegarLoop]: Abstraction has 14779 states and 55133 transitions. [2021-04-15 02:17:26,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:17:26,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 55133 transitions. [2021-04-15 02:17:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:26,959 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:26,959 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:27,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 02:17:27,159 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 39 times [2021-04-15 02:17:27,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:27,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747452790] [2021-04-15 02:17:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:27,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747452790] [2021-04-15 02:17:27,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35765468] [2021-04-15 02:17:27,200 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 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 [2021-04-15 02:17:27,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:17:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165200271] [2021-04-15 02:17:27,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:27,370 INFO L87 Difference]: Start difference. First operand 14779 states and 55133 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:17:28,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:28,368 INFO L93 Difference]: Finished difference Result 22989 states and 82056 transitions. [2021-04-15 02:17:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 02:17:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:17:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:28,430 INFO L225 Difference]: With dead ends: 22989 [2021-04-15 02:17:28,430 INFO L226 Difference]: Without dead ends: 22969 [2021-04-15 02:17:28,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 646.6ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:17:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22969 states. [2021-04-15 02:17:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22969 to 14781. [2021-04-15 02:17:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14781 states, 14780 states have (on average 3.728146143437077) internal successors, (55102), 14780 states have internal predecessors, (55102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14781 states to 14781 states and 55102 transitions. [2021-04-15 02:17:28,834 INFO L78 Accepts]: Start accepts. Automaton has 14781 states and 55102 transitions. Word has length 25 [2021-04-15 02:17:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:28,835 INFO L480 AbstractCegarLoop]: Abstraction has 14781 states and 55102 transitions. [2021-04-15 02:17:28,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:17:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14781 states and 55102 transitions. [2021-04-15 02:17:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:28,969 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:28,969 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:29,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-04-15 02:17:29,173 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:29,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 40 times [2021-04-15 02:17:29,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:29,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528792320] [2021-04-15 02:17:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528792320] [2021-04-15 02:17:29,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617361241] [2021-04-15 02:17:29,227 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 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 [2021-04-15 02:17:29,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:17:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:29,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:29,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237435373] [2021-04-15 02:17:29,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:29,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:29,393 INFO L87 Difference]: Start difference. First operand 14781 states and 55102 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:32,405 INFO L93 Difference]: Finished difference Result 37195 states and 132000 transitions. [2021-04-15 02:17:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-04-15 02:17:32,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:17:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:32,512 INFO L225 Difference]: With dead ends: 37195 [2021-04-15 02:17:32,512 INFO L226 Difference]: Without dead ends: 37167 [2021-04-15 02:17:32,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 1924.3ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 02:17:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37167 states. [2021-04-15 02:17:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37167 to 19078. [2021-04-15 02:17:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 3.8080410966084814) internal successors, (72646), 19077 states have internal predecessors, (72646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 72646 transitions. [2021-04-15 02:17:33,111 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 72646 transitions. Word has length 25 [2021-04-15 02:17:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:33,111 INFO L480 AbstractCegarLoop]: Abstraction has 19078 states and 72646 transitions. [2021-04-15 02:17:33,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 72646 transitions. [2021-04-15 02:17:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:33,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:33,142 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:33,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:33,342 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 41 times [2021-04-15 02:17:33,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:33,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310590658] [2021-04-15 02:17:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:33,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310590658] [2021-04-15 02:17:33,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415181460] [2021-04-15 02:17:33,383 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 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 [2021-04-15 02:17:33,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:17:33,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:33,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:33,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:33,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711135322] [2021-04-15 02:17:33,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:33,677 INFO L87 Difference]: Start difference. First operand 19078 states and 72646 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:36,177 INFO L93 Difference]: Finished difference Result 43751 states and 153541 transitions. [2021-04-15 02:17:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 02:17:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:36,305 INFO L225 Difference]: With dead ends: 43751 [2021-04-15 02:17:36,306 INFO L226 Difference]: Without dead ends: 43723 [2021-04-15 02:17:36,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1594.6ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 02:17:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43723 states. [2021-04-15 02:17:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43723 to 17718. [2021-04-15 02:17:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17718 states, 17717 states have (on average 3.7882259976293957) internal successors, (67116), 17717 states have internal predecessors, (67116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17718 states to 17718 states and 67116 transitions. [2021-04-15 02:17:37,044 INFO L78 Accepts]: Start accepts. Automaton has 17718 states and 67116 transitions. Word has length 25 [2021-04-15 02:17:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:37,044 INFO L480 AbstractCegarLoop]: Abstraction has 17718 states and 67116 transitions. [2021-04-15 02:17:37,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 17718 states and 67116 transitions. [2021-04-15 02:17:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:37,081 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:37,081 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:37,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:37,282 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 42 times [2021-04-15 02:17:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:37,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332215509] [2021-04-15 02:17:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:37,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332215509] [2021-04-15 02:17:37,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711931774] [2021-04-15 02:17:37,320 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:37,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:17:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:37,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:37,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:37,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822951879] [2021-04-15 02:17:37,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:37,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:37,533 INFO L87 Difference]: Start difference. First operand 17718 states and 67116 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:40,561 INFO L93 Difference]: Finished difference Result 38872 states and 138147 transitions. [2021-04-15 02:17:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-04-15 02:17:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:17:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:40,677 INFO L225 Difference]: With dead ends: 38872 [2021-04-15 02:17:40,677 INFO L226 Difference]: Without dead ends: 38848 [2021-04-15 02:17:40,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 1860.2ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 02:17:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38848 states. [2021-04-15 02:17:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38848 to 18921. [2021-04-15 02:17:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18921 states, 18920 states have (on average 3.831553911205074) internal successors, (72493), 18920 states have internal predecessors, (72493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18921 states to 18921 states and 72493 transitions. [2021-04-15 02:17:41,692 INFO L78 Accepts]: Start accepts. Automaton has 18921 states and 72493 transitions. Word has length 25 [2021-04-15 02:17:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:41,692 INFO L480 AbstractCegarLoop]: Abstraction has 18921 states and 72493 transitions. [2021-04-15 02:17:41,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 18921 states and 72493 transitions. [2021-04-15 02:17:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:41,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:41,728 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:41,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-04-15 02:17:41,928 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:41,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 43 times [2021-04-15 02:17:41,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:41,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234730824] [2021-04-15 02:17:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:41,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234730824] [2021-04-15 02:17:41,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309726003] [2021-04-15 02:17:41,966 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 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 [2021-04-15 02:17:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:41,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:42,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:42,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:42,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052264544] [2021-04-15 02:17:42,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:42,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:42,174 INFO L87 Difference]: Start difference. First operand 18921 states and 72493 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:44,215 INFO L93 Difference]: Finished difference Result 43856 states and 155486 transitions. [2021-04-15 02:17:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 02:17:44,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:44,447 INFO L225 Difference]: With dead ends: 43856 [2021-04-15 02:17:44,447 INFO L226 Difference]: Without dead ends: 43856 [2021-04-15 02:17:44,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1272.9ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 02:17:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43856 states. [2021-04-15 02:17:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43856 to 19178. [2021-04-15 02:17:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19178 states, 19177 states have (on average 3.8273452573395215) internal successors, (73397), 19177 states have internal predecessors, (73397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19178 states to 19178 states and 73397 transitions. [2021-04-15 02:17:45,355 INFO L78 Accepts]: Start accepts. Automaton has 19178 states and 73397 transitions. Word has length 25 [2021-04-15 02:17:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:45,355 INFO L480 AbstractCegarLoop]: Abstraction has 19178 states and 73397 transitions. [2021-04-15 02:17:45,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19178 states and 73397 transitions. [2021-04-15 02:17:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:45,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:45,403 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:45,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 02:17:45,603 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 44 times [2021-04-15 02:17:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:45,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101547204] [2021-04-15 02:17:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:45,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101547204] [2021-04-15 02:17:45,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322475976] [2021-04-15 02:17:45,659 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 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 [2021-04-15 02:17:45,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:17:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:45,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:45,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527272986] [2021-04-15 02:17:45,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:45,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:45,862 INFO L87 Difference]: Start difference. First operand 19178 states and 73397 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:48,687 INFO L93 Difference]: Finished difference Result 29040 states and 104169 transitions. [2021-04-15 02:17:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 02:17:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:17:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:48,790 INFO L225 Difference]: With dead ends: 29040 [2021-04-15 02:17:48,791 INFO L226 Difference]: Without dead ends: 29016 [2021-04-15 02:17:48,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 02:17:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29016 states. [2021-04-15 02:17:49,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29016 to 19204. [2021-04-15 02:17:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19204 states, 19203 states have (on average 3.8270061969483935) internal successors, (73490), 19203 states have internal predecessors, (73490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19204 states to 19204 states and 73490 transitions. [2021-04-15 02:17:49,614 INFO L78 Accepts]: Start accepts. Automaton has 19204 states and 73490 transitions. Word has length 25 [2021-04-15 02:17:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:49,614 INFO L480 AbstractCegarLoop]: Abstraction has 19204 states and 73490 transitions. [2021-04-15 02:17:49,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:17:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 19204 states and 73490 transitions. [2021-04-15 02:17:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:49,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:49,665 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:49,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:49,865 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 45 times [2021-04-15 02:17:49,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864108410] [2021-04-15 02:17:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:49,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864108410] [2021-04-15 02:17:49,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371732721] [2021-04-15 02:17:49,929 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 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 [2021-04-15 02:17:49,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:17:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:49,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:50,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:50,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:50,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136205] [2021-04-15 02:17:50,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:50,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:50,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:50,298 INFO L87 Difference]: Start difference. First operand 19204 states and 73490 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:17:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:52,511 INFO L93 Difference]: Finished difference Result 27755 states and 100625 transitions. [2021-04-15 02:17:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:17:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 [2021-04-15 02:17:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:52,610 INFO L225 Difference]: With dead ends: 27755 [2021-04-15 02:17:52,610 INFO L226 Difference]: Without dead ends: 27721 [2021-04-15 02:17:52,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1312.2ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:17:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27721 states. [2021-04-15 02:17:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27721 to 19202. [2021-04-15 02:17:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19202 states, 19201 states have (on average 3.826988177699078) internal successors, (73482), 19201 states have internal predecessors, (73482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19202 states to 19202 states and 73482 transitions. [2021-04-15 02:17:53,234 INFO L78 Accepts]: Start accepts. Automaton has 19202 states and 73482 transitions. Word has length 25 [2021-04-15 02:17:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:53,234 INFO L480 AbstractCegarLoop]: Abstraction has 19202 states and 73482 transitions. [2021-04-15 02:17:53,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:17:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 19202 states and 73482 transitions. [2021-04-15 02:17:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:53,273 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:53,273 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:53,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 02:17:53,474 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 46 times [2021-04-15 02:17:53,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:53,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743875585] [2021-04-15 02:17:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:53,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743875585] [2021-04-15 02:17:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396781535] [2021-04-15 02:17:53,521 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 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 [2021-04-15 02:17:53,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:17:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:53,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:53,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:53,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221533204] [2021-04-15 02:17:53,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:53,887 INFO L87 Difference]: Start difference. First operand 19202 states and 73482 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:56,288 INFO L93 Difference]: Finished difference Result 47167 states and 167443 transitions. [2021-04-15 02:17:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 02:17:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:17:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:17:56,421 INFO L225 Difference]: With dead ends: 47167 [2021-04-15 02:17:56,421 INFO L226 Difference]: Without dead ends: 47160 [2021-04-15 02:17:56,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1580.1ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 02:17:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47160 states. [2021-04-15 02:17:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47160 to 19624. [2021-04-15 02:17:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19624 states, 19623 states have (on average 3.8511440656372624) internal successors, (75571), 19623 states have internal predecessors, (75571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:17:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19624 states to 19624 states and 75571 transitions. [2021-04-15 02:17:57,341 INFO L78 Accepts]: Start accepts. Automaton has 19624 states and 75571 transitions. Word has length 25 [2021-04-15 02:17:57,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:17:57,341 INFO L480 AbstractCegarLoop]: Abstraction has 19624 states and 75571 transitions. [2021-04-15 02:17:57,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:17:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 19624 states and 75571 transitions. [2021-04-15 02:17:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:17:57,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:17:57,376 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:17:57,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:57,577 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:17:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:17:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 47 times [2021-04-15 02:17:57,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:17:57,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867492131] [2021-04-15 02:17:57,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:17:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:17:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867492131] [2021-04-15 02:17:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388771073] [2021-04-15 02:17:57,616 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:17:57,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:17:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:17:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:17:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:17:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:17:57,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:17:57,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:17:57,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866225879] [2021-04-15 02:17:57,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:17:57,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:17:57,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:17:57,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:17:57,763 INFO L87 Difference]: Start difference. First operand 19624 states and 75571 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:17:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:17:59,949 INFO L93 Difference]: Finished difference Result 40091 states and 144259 transitions. [2021-04-15 02:17:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 02:17:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:17:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:00,079 INFO L225 Difference]: With dead ends: 40091 [2021-04-15 02:18:00,080 INFO L226 Difference]: Without dead ends: 40051 [2021-04-15 02:18:00,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1220.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 02:18:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40051 states. [2021-04-15 02:18:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40051 to 19621. [2021-04-15 02:18:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19621 states, 19620 states have (on average 3.849796126401631) internal successors, (75533), 19620 states have internal predecessors, (75533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19621 states to 19621 states and 75533 transitions. [2021-04-15 02:18:01,028 INFO L78 Accepts]: Start accepts. Automaton has 19621 states and 75533 transitions. Word has length 25 [2021-04-15 02:18:01,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:01,028 INFO L480 AbstractCegarLoop]: Abstraction has 19621 states and 75533 transitions. [2021-04-15 02:18:01,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:18:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 19621 states and 75533 transitions. [2021-04-15 02:18:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:01,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:01,074 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:01,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 02:18:01,275 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 48 times [2021-04-15 02:18:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:01,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402075354] [2021-04-15 02:18:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402075354] [2021-04-15 02:18:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903942516] [2021-04-15 02:18:01,328 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 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 [2021-04-15 02:18:01,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:18:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:18:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:01,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:01,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:18:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139455027] [2021-04-15 02:18:01,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:18:01,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:18:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:01,677 INFO L87 Difference]: Start difference. First operand 19621 states and 75533 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:04,684 INFO L93 Difference]: Finished difference Result 45330 states and 159537 transitions. [2021-04-15 02:18:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-04-15 02:18:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:18:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:04,809 INFO L225 Difference]: With dead ends: 45330 [2021-04-15 02:18:04,809 INFO L226 Difference]: Without dead ends: 45295 [2021-04-15 02:18:04,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1976.9ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-04-15 02:18:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45295 states. [2021-04-15 02:18:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45295 to 23060. [2021-04-15 02:18:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23060 states, 23059 states have (on average 3.8386747040201223) internal successors, (88516), 23059 states have internal predecessors, (88516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23060 states to 23060 states and 88516 transitions. [2021-04-15 02:18:05,782 INFO L78 Accepts]: Start accepts. Automaton has 23060 states and 88516 transitions. Word has length 25 [2021-04-15 02:18:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:05,782 INFO L480 AbstractCegarLoop]: Abstraction has 23060 states and 88516 transitions. [2021-04-15 02:18:05,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 23060 states and 88516 transitions. [2021-04-15 02:18:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:05,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:05,831 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:06,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:06,032 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:06,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 49 times [2021-04-15 02:18:06,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:06,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976007670] [2021-04-15 02:18:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:06,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976007670] [2021-04-15 02:18:06,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909575353] [2021-04-15 02:18:06,074 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 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 [2021-04-15 02:18:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:18:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:06,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:06,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:18:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559720730] [2021-04-15 02:18:06,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:18:06,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:06,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:18:06,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:06,228 INFO L87 Difference]: Start difference. First operand 23060 states and 88516 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:07,843 INFO L93 Difference]: Finished difference Result 35887 states and 129882 transitions. [2021-04-15 02:18:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 02:18:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:18:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:07,966 INFO L225 Difference]: With dead ends: 35887 [2021-04-15 02:18:07,967 INFO L226 Difference]: Without dead ends: 35838 [2021-04-15 02:18:07,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:18:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35838 states. [2021-04-15 02:18:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35838 to 23291. [2021-04-15 02:18:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23291 states, 23290 states have (on average 3.831429798196651) internal successors, (89234), 23290 states have internal predecessors, (89234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23291 states to 23291 states and 89234 transitions. [2021-04-15 02:18:08,867 INFO L78 Accepts]: Start accepts. Automaton has 23291 states and 89234 transitions. Word has length 25 [2021-04-15 02:18:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:08,867 INFO L480 AbstractCegarLoop]: Abstraction has 23291 states and 89234 transitions. [2021-04-15 02:18:08,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 23291 states and 89234 transitions. [2021-04-15 02:18:08,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:08,917 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:08,917 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:09,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 02:18:09,117 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:09,118 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 50 times [2021-04-15 02:18:09,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:09,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714749377] [2021-04-15 02:18:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714749377] [2021-04-15 02:18:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832347992] [2021-04-15 02:18:09,209 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 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 [2021-04-15 02:18:09,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:18:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:09,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:09,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:18:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61644771] [2021-04-15 02:18:09,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:18:09,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:09,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:18:09,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:09,462 INFO L87 Difference]: Start difference. First operand 23291 states and 89234 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:11,021 INFO L93 Difference]: Finished difference Result 40122 states and 145058 transitions. [2021-04-15 02:18:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:18:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:18:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:11,143 INFO L225 Difference]: With dead ends: 40122 [2021-04-15 02:18:11,143 INFO L226 Difference]: Without dead ends: 40122 [2021-04-15 02:18:11,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:18:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40122 states. [2021-04-15 02:18:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40122 to 23660. [2021-04-15 02:18:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23660 states, 23659 states have (on average 3.8405258041337333) internal successors, (90863), 23659 states have internal predecessors, (90863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23660 states to 23660 states and 90863 transitions. [2021-04-15 02:18:11,967 INFO L78 Accepts]: Start accepts. Automaton has 23660 states and 90863 transitions. Word has length 25 [2021-04-15 02:18:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:11,967 INFO L480 AbstractCegarLoop]: Abstraction has 23660 states and 90863 transitions. [2021-04-15 02:18:11,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:18:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23660 states and 90863 transitions. [2021-04-15 02:18:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:12,007 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:12,008 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:12,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:12,208 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 51 times [2021-04-15 02:18:12,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:12,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199617780] [2021-04-15 02:18:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199617780] [2021-04-15 02:18:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419769855] [2021-04-15 02:18:12,254 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 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 [2021-04-15 02:18:12,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:18:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:12,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:12,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:12,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608727139] [2021-04-15 02:18:12,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:12,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:12,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:12,454 INFO L87 Difference]: Start difference. First operand 23660 states and 90863 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:14,626 INFO L93 Difference]: Finished difference Result 36984 states and 135370 transitions. [2021-04-15 02:18:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 02:18:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:18:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:14,851 INFO L225 Difference]: With dead ends: 36984 [2021-04-15 02:18:14,851 INFO L226 Difference]: Without dead ends: 36984 [2021-04-15 02:18:14,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1270.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 02:18:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36984 states. [2021-04-15 02:18:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36984 to 23774. [2021-04-15 02:18:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23774 states, 23773 states have (on average 3.8443191856307575) internal successors, (91391), 23773 states have internal predecessors, (91391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23774 states to 23774 states and 91391 transitions. [2021-04-15 02:18:15,661 INFO L78 Accepts]: Start accepts. Automaton has 23774 states and 91391 transitions. Word has length 25 [2021-04-15 02:18:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:15,661 INFO L480 AbstractCegarLoop]: Abstraction has 23774 states and 91391 transitions. [2021-04-15 02:18:15,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23774 states and 91391 transitions. [2021-04-15 02:18:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:15,736 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:15,736 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:15,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:15,953 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 52 times [2021-04-15 02:18:15,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:15,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137850632] [2021-04-15 02:18:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:15,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137850632] [2021-04-15 02:18:15,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236485463] [2021-04-15 02:18:15,999 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 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 [2021-04-15 02:18:16,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:16,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:16,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:16,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996591944] [2021-04-15 02:18:16,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:16,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:16,176 INFO L87 Difference]: Start difference. First operand 23774 states and 91391 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:18,332 INFO L93 Difference]: Finished difference Result 37247 states and 136569 transitions. [2021-04-15 02:18:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 02:18:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:18:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:18,420 INFO L225 Difference]: With dead ends: 37247 [2021-04-15 02:18:18,420 INFO L226 Difference]: Without dead ends: 37247 [2021-04-15 02:18:18,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1301.7ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-04-15 02:18:18,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37247 states. [2021-04-15 02:18:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37247 to 23804. [2021-04-15 02:18:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23804 states, 23803 states have (on average 3.842792925261522) internal successors, (91470), 23803 states have internal predecessors, (91470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23804 states to 23804 states and 91470 transitions. [2021-04-15 02:18:19,119 INFO L78 Accepts]: Start accepts. Automaton has 23804 states and 91470 transitions. Word has length 25 [2021-04-15 02:18:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:19,119 INFO L480 AbstractCegarLoop]: Abstraction has 23804 states and 91470 transitions. [2021-04-15 02:18:19,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 23804 states and 91470 transitions. [2021-04-15 02:18:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:19,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:19,158 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:19,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:19,359 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 53 times [2021-04-15 02:18:19,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:19,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449098341] [2021-04-15 02:18:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:19,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449098341] [2021-04-15 02:18:19,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89104450] [2021-04-15 02:18:19,408 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 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 [2021-04-15 02:18:19,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:18:19,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:19,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:18:19,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:19,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:19,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:18:19,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097507391] [2021-04-15 02:18:19,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:18:19,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:19,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:18:19,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:19,560 INFO L87 Difference]: Start difference. First operand 23804 states and 91470 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:18:19,816 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-04-15 02:18:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:20,859 INFO L93 Difference]: Finished difference Result 37636 states and 136760 transitions. [2021-04-15 02:18:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:18:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:18:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:20,957 INFO L225 Difference]: With dead ends: 37636 [2021-04-15 02:18:20,957 INFO L226 Difference]: Without dead ends: 37618 [2021-04-15 02:18:20,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 02:18:21,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37618 states. [2021-04-15 02:18:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37618 to 23768. [2021-04-15 02:18:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23768 states, 23767 states have (on average 3.8401565195439056) internal successors, (91269), 23767 states have internal predecessors, (91269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23768 states to 23768 states and 91269 transitions. [2021-04-15 02:18:21,779 INFO L78 Accepts]: Start accepts. Automaton has 23768 states and 91269 transitions. Word has length 25 [2021-04-15 02:18:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:21,780 INFO L480 AbstractCegarLoop]: Abstraction has 23768 states and 91269 transitions. [2021-04-15 02:18:21,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:18:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23768 states and 91269 transitions. [2021-04-15 02:18:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:21,818 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:21,818 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:22,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 02:18:22,019 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:22,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 54 times [2021-04-15 02:18:22,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:22,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316985053] [2021-04-15 02:18:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316985053] [2021-04-15 02:18:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553532352] [2021-04-15 02:18:22,087 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 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 [2021-04-15 02:18:22,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:18:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:22,372 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 02:18:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:22,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:22,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764799262] [2021-04-15 02:18:22,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:22,414 INFO L87 Difference]: Start difference. First operand 23768 states and 91269 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,616 INFO L93 Difference]: Finished difference Result 30994 states and 113478 transitions. [2021-04-15 02:18:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 02:18:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:18:24,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,691 INFO L225 Difference]: With dead ends: 30994 [2021-04-15 02:18:24,692 INFO L226 Difference]: Without dead ends: 30990 [2021-04-15 02:18:24,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1572.8ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-04-15 02:18:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30990 states. [2021-04-15 02:18:25,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30990 to 24082. [2021-04-15 02:18:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8476392176404635) internal successors, (92655), 24081 states have internal predecessors, (92655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 92655 transitions. [2021-04-15 02:18:25,357 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 92655 transitions. Word has length 25 [2021-04-15 02:18:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,357 INFO L480 AbstractCegarLoop]: Abstraction has 24082 states and 92655 transitions. [2021-04-15 02:18:25,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 92655 transitions. [2021-04-15 02:18:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:25,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,396 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:25,597 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 55 times [2021-04-15 02:18:25,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723203572] [2021-04-15 02:18:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723203572] [2021-04-15 02:18:25,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576435141] [2021-04-15 02:18:25,646 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 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 [2021-04-15 02:18:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:25,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:25,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292327099] [2021-04-15 02:18:25,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:25,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:25,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:25,847 INFO L87 Difference]: Start difference. First operand 24082 states and 92655 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:27,463 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-04-15 02:18:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,242 INFO L93 Difference]: Finished difference Result 30939 states and 113510 transitions. [2021-04-15 02:18:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-04-15 02:18:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:18:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,324 INFO L225 Difference]: With dead ends: 30939 [2021-04-15 02:18:28,324 INFO L226 Difference]: Without dead ends: 30933 [2021-04-15 02:18:28,324 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1605.1ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 02:18:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30933 states. [2021-04-15 02:18:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30933 to 24064. [2021-04-15 02:18:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24064 states, 24063 states have (on average 3.845779827951627) internal successors, (92541), 24063 states have internal predecessors, (92541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24064 states to 24064 states and 92541 transitions. [2021-04-15 02:18:28,977 INFO L78 Accepts]: Start accepts. Automaton has 24064 states and 92541 transitions. Word has length 25 [2021-04-15 02:18:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,977 INFO L480 AbstractCegarLoop]: Abstraction has 24064 states and 92541 transitions. [2021-04-15 02:18:28,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:18:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 24064 states and 92541 transitions. [2021-04-15 02:18:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:29,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,017 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 02:18:29,217 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 56 times [2021-04-15 02:18:29,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980342649] [2021-04-15 02:18:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980342649] [2021-04-15 02:18:29,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188204599] [2021-04-15 02:18:29,285 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 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 [2021-04-15 02:18:29,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:29,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:29,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:29,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222055646] [2021-04-15 02:18:29,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:29,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:29,480 INFO L87 Difference]: Start difference. First operand 24064 states and 92541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:31,266 INFO L93 Difference]: Finished difference Result 26880 states and 100808 transitions. [2021-04-15 02:18:31,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 02:18:31,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:18:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:31,340 INFO L225 Difference]: With dead ends: 26880 [2021-04-15 02:18:31,340 INFO L226 Difference]: Without dead ends: 26852 [2021-04-15 02:18:31,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 1201.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:18:31,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-04-15 02:18:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 24166. [2021-04-15 02:18:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24166 states, 24165 states have (on average 3.8445272087730187) internal successors, (92903), 24165 states have internal predecessors, (92903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 92903 transitions. [2021-04-15 02:18:31,951 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 92903 transitions. Word has length 25 [2021-04-15 02:18:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:31,951 INFO L480 AbstractCegarLoop]: Abstraction has 24166 states and 92903 transitions. [2021-04-15 02:18:31,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 92903 transitions. [2021-04-15 02:18:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:32,003 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:32,003 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:32,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 02:18:32,203 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 57 times [2021-04-15 02:18:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:32,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281504450] [2021-04-15 02:18:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281504450] [2021-04-15 02:18:32,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099454147] [2021-04-15 02:18:32,271 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 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 [2021-04-15 02:18:32,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:18:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:32,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:32,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:32,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930397185] [2021-04-15 02:18:32,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:32,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:32,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:32,489 INFO L87 Difference]: Start difference. First operand 24166 states and 92903 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:18:33,227 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 02:18:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:34,655 INFO L93 Difference]: Finished difference Result 27190 states and 101686 transitions. [2021-04-15 02:18:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 02:18:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:18:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:34,730 INFO L225 Difference]: With dead ends: 27190 [2021-04-15 02:18:34,730 INFO L226 Difference]: Without dead ends: 27184 [2021-04-15 02:18:34,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 1547.6ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 02:18:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27184 states. [2021-04-15 02:18:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27184 to 24111. [2021-04-15 02:18:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24111 states, 24110 states have (on average 3.8443384487764414) internal successors, (92687), 24110 states have internal predecessors, (92687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24111 states to 24111 states and 92687 transitions. [2021-04-15 02:18:35,365 INFO L78 Accepts]: Start accepts. Automaton has 24111 states and 92687 transitions. Word has length 25 [2021-04-15 02:18:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:35,365 INFO L480 AbstractCegarLoop]: Abstraction has 24111 states and 92687 transitions. [2021-04-15 02:18:35,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:18:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 24111 states and 92687 transitions. [2021-04-15 02:18:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:35,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:35,407 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:35,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:35,609 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:35,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:35,610 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 58 times [2021-04-15 02:18:35,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:35,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637802716] [2021-04-15 02:18:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:35,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637802716] [2021-04-15 02:18:35,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762174447] [2021-04-15 02:18:35,657 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 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 [2021-04-15 02:18:35,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:35,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:18:35,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:35,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:35,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:18:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292821984] [2021-04-15 02:18:35,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:18:35,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:35,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:18:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:35,819 INFO L87 Difference]: Start difference. First operand 24111 states and 92687 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:18:36,634 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-04-15 02:18:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:36,902 INFO L93 Difference]: Finished difference Result 34704 states and 128099 transitions. [2021-04-15 02:18:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:18:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:18:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:37,015 INFO L225 Difference]: With dead ends: 34704 [2021-04-15 02:18:37,016 INFO L226 Difference]: Without dead ends: 34676 [2021-04-15 02:18:37,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:18:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2021-04-15 02:18:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 24102. [2021-04-15 02:18:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24102 states, 24101 states have (on average 3.842994066636239) internal successors, (92620), 24101 states have internal predecessors, (92620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24102 states to 24102 states and 92620 transitions. [2021-04-15 02:18:37,841 INFO L78 Accepts]: Start accepts. Automaton has 24102 states and 92620 transitions. Word has length 25 [2021-04-15 02:18:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:37,841 INFO L480 AbstractCegarLoop]: Abstraction has 24102 states and 92620 transitions. [2021-04-15 02:18:37,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:18:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24102 states and 92620 transitions. [2021-04-15 02:18:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:37,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:37,886 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:38,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:38,088 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 59 times [2021-04-15 02:18:38,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:38,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896072065] [2021-04-15 02:18:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:38,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896072065] [2021-04-15 02:18:38,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813099125] [2021-04-15 02:18:38,168 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 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 [2021-04-15 02:18:38,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:18:38,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:38,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:38,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:38,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:38,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136187968] [2021-04-15 02:18:38,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:38,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:38,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:38,378 INFO L87 Difference]: Start difference. First operand 24102 states and 92620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:39,927 INFO L93 Difference]: Finished difference Result 27178 states and 102221 transitions. [2021-04-15 02:18:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:18:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:18:39,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:39,995 INFO L225 Difference]: With dead ends: 27178 [2021-04-15 02:18:39,996 INFO L226 Difference]: Without dead ends: 27094 [2021-04-15 02:18:39,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 904.1ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:18:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27094 states. [2021-04-15 02:18:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27094 to 24246. [2021-04-15 02:18:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24246 states, 24245 states have (on average 3.8435553722416995) internal successors, (93187), 24245 states have internal predecessors, (93187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24246 states to 24246 states and 93187 transitions. [2021-04-15 02:18:40,731 INFO L78 Accepts]: Start accepts. Automaton has 24246 states and 93187 transitions. Word has length 25 [2021-04-15 02:18:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:40,731 INFO L480 AbstractCegarLoop]: Abstraction has 24246 states and 93187 transitions. [2021-04-15 02:18:40,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24246 states and 93187 transitions. [2021-04-15 02:18:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:40,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:40,775 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:40,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-04-15 02:18:40,976 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 60 times [2021-04-15 02:18:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:40,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141274060] [2021-04-15 02:18:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141274060] [2021-04-15 02:18:41,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017175698] [2021-04-15 02:18:41,026 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 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 [2021-04-15 02:18:41,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:18:41,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:41,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:41,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:41,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189592879] [2021-04-15 02:18:41,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:41,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:41,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:41,201 INFO L87 Difference]: Start difference. First operand 24246 states and 93187 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:42,900 INFO L93 Difference]: Finished difference Result 28189 states and 105216 transitions. [2021-04-15 02:18:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 02:18:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:18:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:42,973 INFO L225 Difference]: With dead ends: 28189 [2021-04-15 02:18:42,974 INFO L226 Difference]: Without dead ends: 28161 [2021-04-15 02:18:42,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 975.3ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:18:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28161 states. [2021-04-15 02:18:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28161 to 24662. [2021-04-15 02:18:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24662 states, 24661 states have (on average 3.841287863428085) internal successors, (94730), 24661 states have internal predecessors, (94730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24662 states to 24662 states and 94730 transitions. [2021-04-15 02:18:43,602 INFO L78 Accepts]: Start accepts. Automaton has 24662 states and 94730 transitions. Word has length 25 [2021-04-15 02:18:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:43,602 INFO L480 AbstractCegarLoop]: Abstraction has 24662 states and 94730 transitions. [2021-04-15 02:18:43,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 24662 states and 94730 transitions. [2021-04-15 02:18:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:43,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:43,659 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:43,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:43,859 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 61 times [2021-04-15 02:18:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:43,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886634808] [2021-04-15 02:18:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,043 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:18:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886634808] [2021-04-15 02:18:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5324409] [2021-04-15 02:18:44,074 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 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 [2021-04-15 02:18:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:44,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:44,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046048894] [2021-04-15 02:18:44,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:44,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:44,264 INFO L87 Difference]: Start difference. First operand 24662 states and 94730 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:18:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:46,038 INFO L93 Difference]: Finished difference Result 28562 states and 106272 transitions. [2021-04-15 02:18:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 02:18:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:18:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:46,237 INFO L225 Difference]: With dead ends: 28562 [2021-04-15 02:18:46,238 INFO L226 Difference]: Without dead ends: 28562 [2021-04-15 02:18:46,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:18:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28562 states. [2021-04-15 02:18:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28562 to 24461. [2021-04-15 02:18:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24461 states, 24460 states have (on average 3.8440719542109565) internal successors, (94026), 24460 states have internal predecessors, (94026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24461 states to 24461 states and 94026 transitions. [2021-04-15 02:18:46,724 INFO L78 Accepts]: Start accepts. Automaton has 24461 states and 94026 transitions. Word has length 25 [2021-04-15 02:18:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:46,724 INFO L480 AbstractCegarLoop]: Abstraction has 24461 states and 94026 transitions. [2021-04-15 02:18:46,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:18:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24461 states and 94026 transitions. [2021-04-15 02:18:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:46,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:46,763 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:46,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:46,964 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 62 times [2021-04-15 02:18:46,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:46,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600517424] [2021-04-15 02:18:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:47,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600517424] [2021-04-15 02:18:47,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924840946] [2021-04-15 02:18:47,012 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 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 [2021-04-15 02:18:47,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:18:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:47,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:47,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:18:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060237591] [2021-04-15 02:18:47,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:18:47,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:18:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:18:47,294 INFO L87 Difference]: Start difference. First operand 24461 states and 94026 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:18:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:49,052 INFO L93 Difference]: Finished difference Result 29417 states and 109341 transitions. [2021-04-15 02:18:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:18:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:18:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:49,122 INFO L225 Difference]: With dead ends: 29417 [2021-04-15 02:18:49,123 INFO L226 Difference]: Without dead ends: 29413 [2021-04-15 02:18:49,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1236.2ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:18:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29413 states. [2021-04-15 02:18:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29413 to 24515. [2021-04-15 02:18:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24515 states, 24514 states have (on average 3.8458431916455904) internal successors, (94277), 24514 states have internal predecessors, (94277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24515 states to 24515 states and 94277 transitions. [2021-04-15 02:18:49,789 INFO L78 Accepts]: Start accepts. Automaton has 24515 states and 94277 transitions. Word has length 25 [2021-04-15 02:18:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:49,789 INFO L480 AbstractCegarLoop]: Abstraction has 24515 states and 94277 transitions. [2021-04-15 02:18:49,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:18:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24515 states and 94277 transitions. [2021-04-15 02:18:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:49,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:49,839 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:50,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:50,040 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 63 times [2021-04-15 02:18:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:50,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860678815] [2021-04-15 02:18:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:18:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860678815] [2021-04-15 02:18:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330533119] [2021-04-15 02:18:50,087 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 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 [2021-04-15 02:18:50,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:18:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:50,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:50,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:50,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:18:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447478835] [2021-04-15 02:18:50,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:18:50,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:18:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:18:50,273 INFO L87 Difference]: Start difference. First operand 24515 states and 94277 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:18:50,422 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-04-15 02:18:52,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:52,154 INFO L93 Difference]: Finished difference Result 29907 states and 110780 transitions. [2021-04-15 02:18:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:18:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:18:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:52,230 INFO L225 Difference]: With dead ends: 29907 [2021-04-15 02:18:52,230 INFO L226 Difference]: Without dead ends: 29907 [2021-04-15 02:18:52,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1228.3ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 02:18:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29907 states. [2021-04-15 02:18:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29907 to 24470. [2021-04-15 02:18:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24470 states, 24469 states have (on average 3.8446605909518166) internal successors, (94075), 24469 states have internal predecessors, (94075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24470 states to 24470 states and 94075 transitions. [2021-04-15 02:18:52,881 INFO L78 Accepts]: Start accepts. Automaton has 24470 states and 94075 transitions. Word has length 25 [2021-04-15 02:18:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:52,881 INFO L480 AbstractCegarLoop]: Abstraction has 24470 states and 94075 transitions. [2021-04-15 02:18:52,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:18:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 24470 states and 94075 transitions. [2021-04-15 02:18:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:52,923 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:52,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:53,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-04-15 02:18:53,124 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 64 times [2021-04-15 02:18:53,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:53,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032743755] [2021-04-15 02:18:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032743755] [2021-04-15 02:18:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306946090] [2021-04-15 02:18:53,172 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 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 [2021-04-15 02:18:53,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:18:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:53,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:53,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:53,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:53,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878006029] [2021-04-15 02:18:53,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:53,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:53,349 INFO L87 Difference]: Start difference. First operand 24470 states and 94075 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:53,741 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-04-15 02:18:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:54,843 INFO L93 Difference]: Finished difference Result 28137 states and 105219 transitions. [2021-04-15 02:18:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 02:18:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:18:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:54,923 INFO L225 Difference]: With dead ends: 28137 [2021-04-15 02:18:54,923 INFO L226 Difference]: Without dead ends: 28053 [2021-04-15 02:18:54,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 951.0ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:18:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28053 states. [2021-04-15 02:18:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28053 to 24568. [2021-04-15 02:18:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24568 states, 24567 states have (on average 3.8438962836325152) internal successors, (94433), 24567 states have internal predecessors, (94433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24568 states to 24568 states and 94433 transitions. [2021-04-15 02:18:55,785 INFO L78 Accepts]: Start accepts. Automaton has 24568 states and 94433 transitions. Word has length 25 [2021-04-15 02:18:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:55,785 INFO L480 AbstractCegarLoop]: Abstraction has 24568 states and 94433 transitions. [2021-04-15 02:18:55,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 24568 states and 94433 transitions. [2021-04-15 02:18:55,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:55,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:55,831 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:56,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 02:18:56,032 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 65 times [2021-04-15 02:18:56,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:56,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433060838] [2021-04-15 02:18:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:56,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433060838] [2021-04-15 02:18:56,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187157158] [2021-04-15 02:18:56,080 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 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 [2021-04-15 02:18:56,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:18:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:56,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:56,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:56,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:56,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519022772] [2021-04-15 02:18:56,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:56,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:56,262 INFO L87 Difference]: Start difference. First operand 24568 states and 94433 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:58,062 INFO L93 Difference]: Finished difference Result 29018 states and 107678 transitions. [2021-04-15 02:18:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 02:18:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:18:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:58,144 INFO L225 Difference]: With dead ends: 29018 [2021-04-15 02:18:58,144 INFO L226 Difference]: Without dead ends: 28983 [2021-04-15 02:18:58,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:18:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28983 states. [2021-04-15 02:18:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28983 to 24726. [2021-04-15 02:18:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24726 states, 24725 states have (on average 3.8420222446916075) internal successors, (94994), 24725 states have internal predecessors, (94994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:58,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24726 states to 24726 states and 94994 transitions. [2021-04-15 02:18:58,863 INFO L78 Accepts]: Start accepts. Automaton has 24726 states and 94994 transitions. Word has length 25 [2021-04-15 02:18:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:58,863 INFO L480 AbstractCegarLoop]: Abstraction has 24726 states and 94994 transitions. [2021-04-15 02:18:58,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:18:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24726 states and 94994 transitions. [2021-04-15 02:18:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:18:58,905 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:58,905 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:59,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 02:18:59,106 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 66 times [2021-04-15 02:18:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:59,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518590962] [2021-04-15 02:18:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518590962] [2021-04-15 02:18:59,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970177144] [2021-04-15 02:18:59,153 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:18:59,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:18:59,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:18:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:18:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:18:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:59,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:18:59,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:18:59,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78787130] [2021-04-15 02:18:59,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:18:59,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:18:59,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:59,341 INFO L87 Difference]: Start difference. First operand 24726 states and 94994 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:01,791 INFO L93 Difference]: Finished difference Result 29429 states and 108803 transitions. [2021-04-15 02:19:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 02:19:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:19:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:01,863 INFO L225 Difference]: With dead ends: 29429 [2021-04-15 02:19:01,864 INFO L226 Difference]: Without dead ends: 29429 [2021-04-15 02:19:01,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 1382.3ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 02:19:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29429 states. [2021-04-15 02:19:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29429 to 24515. [2021-04-15 02:19:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24515 states, 24514 states have (on average 3.8443338500448725) internal successors, (94240), 24514 states have internal predecessors, (94240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24515 states to 24515 states and 94240 transitions. [2021-04-15 02:19:02,613 INFO L78 Accepts]: Start accepts. Automaton has 24515 states and 94240 transitions. Word has length 25 [2021-04-15 02:19:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:02,613 INFO L480 AbstractCegarLoop]: Abstraction has 24515 states and 94240 transitions. [2021-04-15 02:19:02,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 24515 states and 94240 transitions. [2021-04-15 02:19:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:02,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:02,669 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:02,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 02:19:02,871 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:02,871 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 67 times [2021-04-15 02:19:02,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:02,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502821082] [2021-04-15 02:19:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502821082] [2021-04-15 02:19:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839771606] [2021-04-15 02:19:02,928 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 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 [2021-04-15 02:19:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:03,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:03,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460106570] [2021-04-15 02:19:03,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:03,129 INFO L87 Difference]: Start difference. First operand 24515 states and 94240 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:04,599 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 02:19:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:05,066 INFO L93 Difference]: Finished difference Result 28251 states and 105608 transitions. [2021-04-15 02:19:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 02:19:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:19:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:05,136 INFO L225 Difference]: With dead ends: 28251 [2021-04-15 02:19:05,137 INFO L226 Difference]: Without dead ends: 28251 [2021-04-15 02:19:05,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1329.4ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 02:19:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-04-15 02:19:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24687. [2021-04-15 02:19:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 3.8474033865348782) internal successors, (94977), 24686 states have internal predecessors, (94977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 94977 transitions. [2021-04-15 02:19:05,887 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 94977 transitions. Word has length 25 [2021-04-15 02:19:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:05,887 INFO L480 AbstractCegarLoop]: Abstraction has 24687 states and 94977 transitions. [2021-04-15 02:19:05,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 94977 transitions. [2021-04-15 02:19:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:05,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:05,931 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:06,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 02:19:06,132 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 68 times [2021-04-15 02:19:06,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:06,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346812677] [2021-04-15 02:19:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346812677] [2021-04-15 02:19:06,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556196356] [2021-04-15 02:19:06,179 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 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 [2021-04-15 02:19:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:06,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:06,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:06,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400329081] [2021-04-15 02:19:06,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:06,394 INFO L87 Difference]: Start difference. First operand 24687 states and 94977 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:08,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:08,317 INFO L93 Difference]: Finished difference Result 27902 states and 104651 transitions. [2021-04-15 02:19:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:19:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:19:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:08,390 INFO L225 Difference]: With dead ends: 27902 [2021-04-15 02:19:08,391 INFO L226 Difference]: Without dead ends: 27867 [2021-04-15 02:19:08,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 964.3ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:19:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27867 states. [2021-04-15 02:19:08,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27867 to 24681. [2021-04-15 02:19:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24681 states, 24680 states have (on average 3.8464343598055106) internal successors, (94930), 24680 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24681 states to 24681 states and 94930 transitions. [2021-04-15 02:19:08,958 INFO L78 Accepts]: Start accepts. Automaton has 24681 states and 94930 transitions. Word has length 25 [2021-04-15 02:19:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:08,958 INFO L480 AbstractCegarLoop]: Abstraction has 24681 states and 94930 transitions. [2021-04-15 02:19:08,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24681 states and 94930 transitions. [2021-04-15 02:19:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:09,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:09,172 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:09,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:09,373 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 69 times [2021-04-15 02:19:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:09,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362318905] [2021-04-15 02:19:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:09,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362318905] [2021-04-15 02:19:09,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946953058] [2021-04-15 02:19:09,433 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 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 [2021-04-15 02:19:09,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:09,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:09,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:09,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:09,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:09,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42554358] [2021-04-15 02:19:09,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:09,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:09,636 INFO L87 Difference]: Start difference. First operand 24681 states and 94930 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:12,224 INFO L93 Difference]: Finished difference Result 31956 states and 117413 transitions. [2021-04-15 02:19:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:19:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:19:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:12,437 INFO L225 Difference]: With dead ends: 31956 [2021-04-15 02:19:12,437 INFO L226 Difference]: Without dead ends: 31956 [2021-04-15 02:19:12,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1485.7ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 02:19:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31956 states. [2021-04-15 02:19:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31956 to 24719. [2021-04-15 02:19:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24719 states, 24718 states have (on average 3.848329152844081) internal successors, (95123), 24718 states have internal predecessors, (95123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24719 states to 24719 states and 95123 transitions. [2021-04-15 02:19:13,036 INFO L78 Accepts]: Start accepts. Automaton has 24719 states and 95123 transitions. Word has length 25 [2021-04-15 02:19:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:13,036 INFO L480 AbstractCegarLoop]: Abstraction has 24719 states and 95123 transitions. [2021-04-15 02:19:13,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24719 states and 95123 transitions. [2021-04-15 02:19:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:13,077 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:13,077 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:13,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 02:19:13,277 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 70 times [2021-04-15 02:19:13,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:13,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591058192] [2021-04-15 02:19:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591058192] [2021-04-15 02:19:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832294763] [2021-04-15 02:19:13,335 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 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 [2021-04-15 02:19:13,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:13,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:13,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:13,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:13,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:13,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602272048] [2021-04-15 02:19:13,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:13,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:13,621 INFO L87 Difference]: Start difference. First operand 24719 states and 95123 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:15,635 INFO L93 Difference]: Finished difference Result 31907 states and 117451 transitions. [2021-04-15 02:19:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:19:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:19:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:15,737 INFO L225 Difference]: With dead ends: 31907 [2021-04-15 02:19:15,737 INFO L226 Difference]: Without dead ends: 31907 [2021-04-15 02:19:15,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 02:19:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31907 states. [2021-04-15 02:19:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31907 to 24705. [2021-04-15 02:19:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24705 states, 24704 states have (on average 3.8469478626943006) internal successors, (95035), 24704 states have internal predecessors, (95035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24705 states to 24705 states and 95035 transitions. [2021-04-15 02:19:16,473 INFO L78 Accepts]: Start accepts. Automaton has 24705 states and 95035 transitions. Word has length 25 [2021-04-15 02:19:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:16,473 INFO L480 AbstractCegarLoop]: Abstraction has 24705 states and 95035 transitions. [2021-04-15 02:19:16,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:19:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24705 states and 95035 transitions. [2021-04-15 02:19:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:16,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:16,517 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:16,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-04-15 02:19:16,717 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:16,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 71 times [2021-04-15 02:19:16,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:16,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547104271] [2021-04-15 02:19:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:16,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547104271] [2021-04-15 02:19:16,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927847267] [2021-04-15 02:19:16,768 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 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 [2021-04-15 02:19:16,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:16,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24763398] [2021-04-15 02:19:16,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:16,957 INFO L87 Difference]: Start difference. First operand 24705 states and 95035 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:18,486 INFO L93 Difference]: Finished difference Result 27965 states and 104854 transitions. [2021-04-15 02:19:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:19:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:19:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:18,554 INFO L225 Difference]: With dead ends: 27965 [2021-04-15 02:19:18,554 INFO L226 Difference]: Without dead ends: 27930 [2021-04-15 02:19:18,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 838.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:19:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27930 states. [2021-04-15 02:19:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27930 to 24732. [2021-04-15 02:19:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24732 states, 24731 states have (on average 3.8465084307144877) internal successors, (95128), 24731 states have internal predecessors, (95128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24732 states to 24732 states and 95128 transitions. [2021-04-15 02:19:19,205 INFO L78 Accepts]: Start accepts. Automaton has 24732 states and 95128 transitions. Word has length 25 [2021-04-15 02:19:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:19,205 INFO L480 AbstractCegarLoop]: Abstraction has 24732 states and 95128 transitions. [2021-04-15 02:19:19,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 24732 states and 95128 transitions. [2021-04-15 02:19:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:19,246 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:19,246 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:19,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:19,447 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 72 times [2021-04-15 02:19:19,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:19,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301926264] [2021-04-15 02:19:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301926264] [2021-04-15 02:19:19,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300526957] [2021-04-15 02:19:19,494 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 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 [2021-04-15 02:19:19,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:19,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:19,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:19,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:19,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:19,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108359496] [2021-04-15 02:19:19,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:19,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:19,830 INFO L87 Difference]: Start difference. First operand 24732 states and 95128 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:21,994 INFO L93 Difference]: Finished difference Result 28264 states and 105755 transitions. [2021-04-15 02:19:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 02:19:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:19:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:22,069 INFO L225 Difference]: With dead ends: 28264 [2021-04-15 02:19:22,069 INFO L226 Difference]: Without dead ends: 28264 [2021-04-15 02:19:22,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1366.2ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 02:19:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28264 states. [2021-04-15 02:19:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28264 to 24684. [2021-04-15 02:19:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24684 states, 24683 states have (on average 3.8468581614876634) internal successors, (94952), 24683 states have internal predecessors, (94952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24684 states to 24684 states and 94952 transitions. [2021-04-15 02:19:22,807 INFO L78 Accepts]: Start accepts. Automaton has 24684 states and 94952 transitions. Word has length 25 [2021-04-15 02:19:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:22,807 INFO L480 AbstractCegarLoop]: Abstraction has 24684 states and 94952 transitions. [2021-04-15 02:19:22,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24684 states and 94952 transitions. [2021-04-15 02:19:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:22,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:22,850 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:23,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:23,065 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash 513844762, now seen corresponding path program 73 times [2021-04-15 02:19:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:23,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001864538] [2021-04-15 02:19:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:23,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001864538] [2021-04-15 02:19:23,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994172981] [2021-04-15 02:19:23,119 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 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 [2021-04-15 02:19:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:23,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:23,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044956200] [2021-04-15 02:19:23,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:23,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:23,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:23,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:23,319 INFO L87 Difference]: Start difference. First operand 24684 states and 94952 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:24,201 INFO L93 Difference]: Finished difference Result 25632 states and 97440 transitions. [2021-04-15 02:19:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:19:24,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:19:24,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:24,279 INFO L225 Difference]: With dead ends: 25632 [2021-04-15 02:19:24,279 INFO L226 Difference]: Without dead ends: 25593 [2021-04-15 02:19:24,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:19:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25593 states. [2021-04-15 02:19:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25593 to 24694. [2021-04-15 02:19:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.846677195966468) internal successors, (94986), 24693 states have internal predecessors, (94986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94986 transitions. [2021-04-15 02:19:24,958 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94986 transitions. Word has length 25 [2021-04-15 02:19:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:24,958 INFO L480 AbstractCegarLoop]: Abstraction has 24694 states and 94986 transitions. [2021-04-15 02:19:24,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94986 transitions. [2021-04-15 02:19:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:25,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:25,009 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:25,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:25,232 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1943083934, now seen corresponding path program 74 times [2021-04-15 02:19:25,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:25,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305722753] [2021-04-15 02:19:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305722753] [2021-04-15 02:19:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793203312] [2021-04-15 02:19:25,313 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 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 [2021-04-15 02:19:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:25,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:25,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:25,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596316548] [2021-04-15 02:19:25,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:25,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:25,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:25,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:25,561 INFO L87 Difference]: Start difference. First operand 24694 states and 94986 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:26,784 INFO L93 Difference]: Finished difference Result 25462 states and 96999 transitions. [2021-04-15 02:19:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:19:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:19:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:26,856 INFO L225 Difference]: With dead ends: 25462 [2021-04-15 02:19:26,857 INFO L226 Difference]: Without dead ends: 25441 [2021-04-15 02:19:26,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1213, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:19:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-04-15 02:19:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 24694. [2021-04-15 02:19:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.8464342121248936) internal successors, (94980), 24693 states have internal predecessors, (94980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94980 transitions. [2021-04-15 02:19:27,560 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94980 transitions. Word has length 25 [2021-04-15 02:19:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:27,561 INFO L480 AbstractCegarLoop]: Abstraction has 24694 states and 94980 transitions. [2021-04-15 02:19:27,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94980 transitions. [2021-04-15 02:19:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:27,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:27,604 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:27,804 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1021296226, now seen corresponding path program 75 times [2021-04-15 02:19:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986852683] [2021-04-15 02:19:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986852683] [2021-04-15 02:19:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272622121] [2021-04-15 02:19:27,859 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 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 [2021-04-15 02:19:27,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:19:27,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:28,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:28,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:28,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650887231] [2021-04-15 02:19:28,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:28,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:28,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:28,051 INFO L87 Difference]: Start difference. First operand 24694 states and 94980 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:29,496 INFO L93 Difference]: Finished difference Result 25395 states and 96836 transitions. [2021-04-15 02:19:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:19:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:19:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:29,584 INFO L225 Difference]: With dead ends: 25395 [2021-04-15 02:19:29,584 INFO L226 Difference]: Without dead ends: 25388 [2021-04-15 02:19:29,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1010.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1441, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:19:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25388 states. [2021-04-15 02:19:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25388 to 24694. [2021-04-15 02:19:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.8463127202041063) internal successors, (94977), 24693 states have internal predecessors, (94977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94977 transitions. [2021-04-15 02:19:30,300 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94977 transitions. Word has length 25 [2021-04-15 02:19:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:30,300 INFO L480 AbstractCegarLoop]: Abstraction has 24694 states and 94977 transitions. [2021-04-15 02:19:30,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:19:30,301 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94977 transitions. [2021-04-15 02:19:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:30,346 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:30,346 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:30,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 02:19:30,547 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2125890918, now seen corresponding path program 76 times [2021-04-15 02:19:30,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:30,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812153269] [2021-04-15 02:19:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:30,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812153269] [2021-04-15 02:19:30,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188951721] [2021-04-15 02:19:30,610 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 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 [2021-04-15 02:19:30,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:19:30,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:19:30,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:30,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:30,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:19:30,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825319634] [2021-04-15 02:19:30,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:19:30,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:30,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:19:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:19:30,827 INFO L87 Difference]: Start difference. First operand 24694 states and 94977 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:32,265 INFO L93 Difference]: Finished difference Result 25484 states and 97099 transitions. [2021-04-15 02:19:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:19:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:19:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:32,336 INFO L225 Difference]: With dead ends: 25484 [2021-04-15 02:19:32,336 INFO L226 Difference]: Without dead ends: 25484 [2021-04-15 02:19:32,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 975.7ms TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:19:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25484 states. [2021-04-15 02:19:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25484 to 24676. [2021-04-15 02:19:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24676 states, 24675 states have (on average 3.846565349544073) internal successors, (94914), 24675 states have internal predecessors, (94914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24676 states to 24676 states and 94914 transitions. [2021-04-15 02:19:33,123 INFO L78 Accepts]: Start accepts. Automaton has 24676 states and 94914 transitions. Word has length 25 [2021-04-15 02:19:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:33,123 INFO L480 AbstractCegarLoop]: Abstraction has 24676 states and 94914 transitions. [2021-04-15 02:19:33,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:19:33,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24676 states and 94914 transitions. [2021-04-15 02:19:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:33,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:33,177 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:33,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 02:19:33,378 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1782522160, now seen corresponding path program 47 times [2021-04-15 02:19:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:33,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591084319] [2021-04-15 02:19:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:33,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591084319] [2021-04-15 02:19:33,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421542548] [2021-04-15 02:19:33,423 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 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 [2021-04-15 02:19:33,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:19:33,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:33,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-04-15 02:19:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857746395] [2021-04-15 02:19:33,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:19:33,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:19:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:19:33,592 INFO L87 Difference]: Start difference. First operand 24676 states and 94914 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-04-15 02:19:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:34,124 INFO L93 Difference]: Finished difference Result 35078 states and 126526 transitions. [2021-04-15 02:19:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:19:34,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 [2021-04-15 02:19:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:34,240 INFO L225 Difference]: With dead ends: 35078 [2021-04-15 02:19:34,241 INFO L226 Difference]: Without dead ends: 35071 [2021-04-15 02:19:34,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:19:34,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35071 states. [2021-04-15 02:19:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35071 to 24193. [2021-04-15 02:19:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24193 states, 24192 states have (on average 3.8466848544973544) internal successors, (93059), 24192 states have internal predecessors, (93059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24193 states to 24193 states and 93059 transitions. [2021-04-15 02:19:35,257 INFO L78 Accepts]: Start accepts. Automaton has 24193 states and 93059 transitions. Word has length 25 [2021-04-15 02:19:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:35,257 INFO L480 AbstractCegarLoop]: Abstraction has 24193 states and 93059 transitions. [2021-04-15 02:19:35,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2021-04-15 02:19:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 24193 states and 93059 transitions. [2021-04-15 02:19:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:35,320 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:35,320 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:35,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 02:19:35,537 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 77 times [2021-04-15 02:19:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:35,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265953455] [2021-04-15 02:19:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:35,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265953455] [2021-04-15 02:19:35,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726343827] [2021-04-15 02:19:35,659 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 [2021-04-15 02:19:35,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:19:35,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:35,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:36,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:36,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:19:36,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820697058] [2021-04-15 02:19:36,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:36,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:36,045 INFO L87 Difference]: Start difference. First operand 24193 states and 93059 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:19:37,669 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 02:19:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:38,761 INFO L93 Difference]: Finished difference Result 52705 states and 193549 transitions. [2021-04-15 02:19:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 02:19:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:19:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:38,908 INFO L225 Difference]: With dead ends: 52705 [2021-04-15 02:19:38,908 INFO L226 Difference]: Without dead ends: 52653 [2021-04-15 02:19:38,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 1984.4ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 02:19:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52653 states. [2021-04-15 02:19:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52653 to 27845. [2021-04-15 02:19:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27845 states, 27844 states have (on average 3.8819135181726763) internal successors, (108088), 27844 states have internal predecessors, (108088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27845 states to 27845 states and 108088 transitions. [2021-04-15 02:19:39,938 INFO L78 Accepts]: Start accepts. Automaton has 27845 states and 108088 transitions. Word has length 25 [2021-04-15 02:19:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:39,938 INFO L480 AbstractCegarLoop]: Abstraction has 27845 states and 108088 transitions. [2021-04-15 02:19:39,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:19:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 27845 states and 108088 transitions. [2021-04-15 02:19:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:39,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:39,998 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:40,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 02:19:40,199 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 78 times [2021-04-15 02:19:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:40,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892011985] [2021-04-15 02:19:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:40,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892011985] [2021-04-15 02:19:40,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7126009] [2021-04-15 02:19:40,270 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 [2021-04-15 02:19:40,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:19:40,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:40,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:40,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:19:40,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476851124] [2021-04-15 02:19:40,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:40,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:40,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:40,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:40,518 INFO L87 Difference]: Start difference. First operand 27845 states and 108088 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:43,041 INFO L93 Difference]: Finished difference Result 60991 states and 221222 transitions. [2021-04-15 02:19:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 02:19:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:19:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:43,401 INFO L225 Difference]: With dead ends: 60991 [2021-04-15 02:19:43,402 INFO L226 Difference]: Without dead ends: 60949 [2021-04-15 02:19:43,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1494.6ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 02:19:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60949 states. [2021-04-15 02:19:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60949 to 26506. [2021-04-15 02:19:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26506 states, 26505 states have (on average 3.861950575363139) internal successors, (102361), 26505 states have internal predecessors, (102361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26506 states to 26506 states and 102361 transitions. [2021-04-15 02:19:44,418 INFO L78 Accepts]: Start accepts. Automaton has 26506 states and 102361 transitions. Word has length 25 [2021-04-15 02:19:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:44,418 INFO L480 AbstractCegarLoop]: Abstraction has 26506 states and 102361 transitions. [2021-04-15 02:19:44,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 26506 states and 102361 transitions. [2021-04-15 02:19:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:44,485 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:44,485 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:44,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-04-15 02:19:44,686 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:44,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 79 times [2021-04-15 02:19:44,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:44,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570403469] [2021-04-15 02:19:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:44,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570403469] [2021-04-15 02:19:44,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586541099] [2021-04-15 02:19:44,775 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 [2021-04-15 02:19:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:44,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:45,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:45,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:19:45,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219478585] [2021-04-15 02:19:45,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:45,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:45,180 INFO L87 Difference]: Start difference. First operand 26506 states and 102361 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:47,511 INFO L93 Difference]: Finished difference Result 52440 states and 190195 transitions. [2021-04-15 02:19:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 02:19:47,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:19:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:47,649 INFO L225 Difference]: With dead ends: 52440 [2021-04-15 02:19:47,649 INFO L226 Difference]: Without dead ends: 52412 [2021-04-15 02:19:47,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1497.8ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:19:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52412 states. [2021-04-15 02:19:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52412 to 29320. [2021-04-15 02:19:48,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29320 states, 29319 states have (on average 3.863637913980695) internal successors, (113278), 29319 states have internal predecessors, (113278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29320 states to 29320 states and 113278 transitions. [2021-04-15 02:19:48,624 INFO L78 Accepts]: Start accepts. Automaton has 29320 states and 113278 transitions. Word has length 25 [2021-04-15 02:19:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:48,624 INFO L480 AbstractCegarLoop]: Abstraction has 29320 states and 113278 transitions. [2021-04-15 02:19:48,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29320 states and 113278 transitions. [2021-04-15 02:19:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:48,686 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:48,686 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:48,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 02:19:48,886 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 80 times [2021-04-15 02:19:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:48,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960054192] [2021-04-15 02:19:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:48,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960054192] [2021-04-15 02:19:48,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712760601] [2021-04-15 02:19:48,943 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 [2021-04-15 02:19:48,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:19:48,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:49,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:49,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:19:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485266874] [2021-04-15 02:19:49,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:49,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:49,141 INFO L87 Difference]: Start difference. First operand 29320 states and 113278 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:51,812 INFO L93 Difference]: Finished difference Result 67617 states and 247482 transitions. [2021-04-15 02:19:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 02:19:51,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:19:51,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:52,014 INFO L225 Difference]: With dead ends: 67617 [2021-04-15 02:19:52,014 INFO L226 Difference]: Without dead ends: 67589 [2021-04-15 02:19:52,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1697.3ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 02:19:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67589 states. [2021-04-15 02:19:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67589 to 35399. [2021-04-15 02:19:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35399 states, 35398 states have (on average 3.8848240013560087) internal successors, (137515), 35398 states have internal predecessors, (137515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35399 states to 35399 states and 137515 transitions. [2021-04-15 02:19:53,462 INFO L78 Accepts]: Start accepts. Automaton has 35399 states and 137515 transitions. Word has length 25 [2021-04-15 02:19:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:53,462 INFO L480 AbstractCegarLoop]: Abstraction has 35399 states and 137515 transitions. [2021-04-15 02:19:53,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:19:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 35399 states and 137515 transitions. [2021-04-15 02:19:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:53,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:53,529 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:53,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:53,730 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 81 times [2021-04-15 02:19:53,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:53,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763994433] [2021-04-15 02:19:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:53,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763994433] [2021-04-15 02:19:53,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361727677] [2021-04-15 02:19:53,782 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 [2021-04-15 02:19:53,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:19:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:19:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:53,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:53,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:19:53,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826985796] [2021-04-15 02:19:53,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:19:53,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:19:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:19:53,967 INFO L87 Difference]: Start difference. First operand 35399 states and 137515 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:19:54,379 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-04-15 02:19:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:56,218 INFO L93 Difference]: Finished difference Result 56637 states and 210055 transitions. [2021-04-15 02:19:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 02:19:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:19:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:56,391 INFO L225 Difference]: With dead ends: 56637 [2021-04-15 02:19:56,391 INFO L226 Difference]: Without dead ends: 56585 [2021-04-15 02:19:56,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1428.5ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 02:19:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56585 states. [2021-04-15 02:19:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56585 to 30974. [2021-04-15 02:19:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30974 states, 30973 states have (on average 3.867174635973267) internal successors, (119778), 30973 states have internal predecessors, (119778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:19:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30974 states to 30974 states and 119778 transitions. [2021-04-15 02:19:57,532 INFO L78 Accepts]: Start accepts. Automaton has 30974 states and 119778 transitions. Word has length 25 [2021-04-15 02:19:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:19:57,533 INFO L480 AbstractCegarLoop]: Abstraction has 30974 states and 119778 transitions. [2021-04-15 02:19:57,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:19:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 30974 states and 119778 transitions. [2021-04-15 02:19:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:19:57,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:19:57,826 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:19:58,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:19:58,029 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:19:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:19:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1897971604, now seen corresponding path program 48 times [2021-04-15 02:19:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:19:58,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657587201] [2021-04-15 02:19:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:19:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:19:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:19:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657587201] [2021-04-15 02:19:58,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90983561] [2021-04-15 02:19:58,075 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 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 [2021-04-15 02:19:58,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:19:58,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:19:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:19:58,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:19:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:19:58,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:19:58,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:19:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961282282] [2021-04-15 02:19:58,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:19:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:19:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:19:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:19:58,220 INFO L87 Difference]: Start difference. First operand 30974 states and 119778 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 02:19:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:19:58,790 INFO L93 Difference]: Finished difference Result 51705 states and 192092 transitions. [2021-04-15 02:19:58,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:19:58,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 [2021-04-15 02:19:58,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:19:58,942 INFO L225 Difference]: With dead ends: 51705 [2021-04-15 02:19:58,943 INFO L226 Difference]: Without dead ends: 51705 [2021-04-15 02:19:58,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:19:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51705 states. [2021-04-15 02:20:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51705 to 39709. [2021-04-15 02:20:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39709 states, 39708 states have (on average 3.9065679460058425) internal successors, (155122), 39708 states have internal predecessors, (155122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39709 states to 39709 states and 155122 transitions. [2021-04-15 02:20:00,402 INFO L78 Accepts]: Start accepts. Automaton has 39709 states and 155122 transitions. Word has length 25 [2021-04-15 02:20:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:00,402 INFO L480 AbstractCegarLoop]: Abstraction has 39709 states and 155122 transitions. [2021-04-15 02:20:00,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 02:20:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39709 states and 155122 transitions. [2021-04-15 02:20:00,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:00,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:00,472 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:00,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:00,672 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:00,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 82 times [2021-04-15 02:20:00,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:00,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087576915] [2021-04-15 02:20:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:00,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087576915] [2021-04-15 02:20:00,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587121675] [2021-04-15 02:20:00,736 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 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 [2021-04-15 02:20:00,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:00,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:00,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:00,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:01,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:01,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:01,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268986151] [2021-04-15 02:20:01,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:01,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:01,148 INFO L87 Difference]: Start difference. First operand 39709 states and 155122 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:03,384 INFO L93 Difference]: Finished difference Result 66388 states and 248949 transitions. [2021-04-15 02:20:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 02:20:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:20:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:03,571 INFO L225 Difference]: With dead ends: 66388 [2021-04-15 02:20:03,572 INFO L226 Difference]: Without dead ends: 66372 [2021-04-15 02:20:03,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 1426.4ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 02:20:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66372 states. [2021-04-15 02:20:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66372 to 41635. [2021-04-15 02:20:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41635 states, 41634 states have (on average 3.926910697987222) internal successors, (163493), 41634 states have internal predecessors, (163493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41635 states to 41635 states and 163493 transitions. [2021-04-15 02:20:05,043 INFO L78 Accepts]: Start accepts. Automaton has 41635 states and 163493 transitions. Word has length 25 [2021-04-15 02:20:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:05,043 INFO L480 AbstractCegarLoop]: Abstraction has 41635 states and 163493 transitions. [2021-04-15 02:20:05,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 41635 states and 163493 transitions. [2021-04-15 02:20:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:05,113 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:05,113 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:05,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:05,314 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 83 times [2021-04-15 02:20:05,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:05,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103006049] [2021-04-15 02:20:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103006049] [2021-04-15 02:20:05,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459415433] [2021-04-15 02:20:05,372 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 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 [2021-04-15 02:20:05,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:20:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:05,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:05,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:05,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559714452] [2021-04-15 02:20:05,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:05,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:05,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:05,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:05,553 INFO L87 Difference]: Start difference. First operand 41635 states and 163493 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:07,819 INFO L93 Difference]: Finished difference Result 72325 states and 269834 transitions. [2021-04-15 02:20:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:20:07,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:20:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:08,083 INFO L225 Difference]: With dead ends: 72325 [2021-04-15 02:20:08,083 INFO L226 Difference]: Without dead ends: 72325 [2021-04-15 02:20:08,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1080.4ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:20:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72325 states. [2021-04-15 02:20:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72325 to 41575. [2021-04-15 02:20:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41575 states, 41574 states have (on average 3.9234617789964883) internal successors, (163114), 41574 states have internal predecessors, (163114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 163114 transitions. [2021-04-15 02:20:09,517 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 163114 transitions. Word has length 25 [2021-04-15 02:20:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:09,517 INFO L480 AbstractCegarLoop]: Abstraction has 41575 states and 163114 transitions. [2021-04-15 02:20:09,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 163114 transitions. [2021-04-15 02:20:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:09,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:09,588 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:09,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:09,788 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1911191588, now seen corresponding path program 49 times [2021-04-15 02:20:09,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:09,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528132145] [2021-04-15 02:20:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:09,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528132145] [2021-04-15 02:20:09,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684265214] [2021-04-15 02:20:09,827 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 [2021-04-15 02:20:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:20:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:09,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:09,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 02:20:09,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659519574] [2021-04-15 02:20:09,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:09,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:09,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:09,952 INFO L87 Difference]: Start difference. First operand 41575 states and 163114 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:20:10,420 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-04-15 02:20:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:10,718 INFO L93 Difference]: Finished difference Result 49782 states and 187824 transitions. [2021-04-15 02:20:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:10,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 [2021-04-15 02:20:10,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:10,851 INFO L225 Difference]: With dead ends: 49782 [2021-04-15 02:20:10,851 INFO L226 Difference]: Without dead ends: 49774 [2021-04-15 02:20:10,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:20:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49774 states. [2021-04-15 02:20:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49774 to 41562. [2021-04-15 02:20:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41562 states, 41561 states have (on average 3.9228122518707442) internal successors, (163036), 41561 states have internal predecessors, (163036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41562 states to 41562 states and 163036 transitions. [2021-04-15 02:20:12,107 INFO L78 Accepts]: Start accepts. Automaton has 41562 states and 163036 transitions. Word has length 25 [2021-04-15 02:20:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:12,107 INFO L480 AbstractCegarLoop]: Abstraction has 41562 states and 163036 transitions. [2021-04-15 02:20:12,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-04-15 02:20:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41562 states and 163036 transitions. [2021-04-15 02:20:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:12,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:12,187 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:12,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-04-15 02:20:12,388 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 50 times [2021-04-15 02:20:12,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:12,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207311528] [2021-04-15 02:20:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207311528] [2021-04-15 02:20:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627771276] [2021-04-15 02:20:12,453 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 [2021-04-15 02:20:12,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:12,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:12,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:12,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:20:12,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323017904] [2021-04-15 02:20:12,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:12,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:12,677 INFO L87 Difference]: Start difference. First operand 41562 states and 163036 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:20:13,637 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-04-15 02:20:14,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:14,269 INFO L93 Difference]: Finished difference Result 46635 states and 178550 transitions. [2021-04-15 02:20:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:20:14,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:20:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:14,393 INFO L225 Difference]: With dead ends: 46635 [2021-04-15 02:20:14,393 INFO L226 Difference]: Without dead ends: 46635 [2021-04-15 02:20:14,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:20:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46635 states. [2021-04-15 02:20:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46635 to 41520. [2021-04-15 02:20:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41520 states, 41519 states have (on average 3.922902767407693) internal successors, (162875), 41519 states have internal predecessors, (162875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41520 states to 41520 states and 162875 transitions. [2021-04-15 02:20:15,647 INFO L78 Accepts]: Start accepts. Automaton has 41520 states and 162875 transitions. Word has length 25 [2021-04-15 02:20:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:15,647 INFO L480 AbstractCegarLoop]: Abstraction has 41520 states and 162875 transitions. [2021-04-15 02:20:15,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:20:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 41520 states and 162875 transitions. [2021-04-15 02:20:15,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:15,727 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:15,728 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:15,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-04-15 02:20:15,928 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1747308854, now seen corresponding path program 51 times [2021-04-15 02:20:15,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:15,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847760256] [2021-04-15 02:20:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:15,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847760256] [2021-04-15 02:20:15,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339116191] [2021-04-15 02:20:15,970 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 [2021-04-15 02:20:15,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:15,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:15,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:20:15,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:20:16,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:16,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 02:20:16,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832100630] [2021-04-15 02:20:16,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:20:16,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:20:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:20:16,093 INFO L87 Difference]: Start difference. First operand 41520 states and 162875 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-04-15 02:20:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:16,597 INFO L93 Difference]: Finished difference Result 48249 states and 183115 transitions. [2021-04-15 02:20:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:20:16,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 [2021-04-15 02:20:16,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:16,722 INFO L225 Difference]: With dead ends: 48249 [2021-04-15 02:20:16,722 INFO L226 Difference]: Without dead ends: 48227 [2021-04-15 02:20:16,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:20:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48227 states. [2021-04-15 02:20:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48227 to 41508. [2021-04-15 02:20:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41508 states, 41507 states have (on average 3.9222299853036837) internal successors, (162800), 41507 states have internal predecessors, (162800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41508 states to 41508 states and 162800 transitions. [2021-04-15 02:20:18,247 INFO L78 Accepts]: Start accepts. Automaton has 41508 states and 162800 transitions. Word has length 25 [2021-04-15 02:20:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:18,247 INFO L480 AbstractCegarLoop]: Abstraction has 41508 states and 162800 transitions. [2021-04-15 02:20:18,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-04-15 02:20:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 41508 states and 162800 transitions. [2021-04-15 02:20:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:18,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:18,321 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:18,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 02:20:18,521 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:18,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 52 times [2021-04-15 02:20:18,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:18,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419299830] [2021-04-15 02:20:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:18,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419299830] [2021-04-15 02:20:18,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411489322] [2021-04-15 02:20:18,607 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 [2021-04-15 02:20:18,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:18,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:18,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:20:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529216786] [2021-04-15 02:20:18,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:18,844 INFO L87 Difference]: Start difference. First operand 41508 states and 162800 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:20:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:19,910 INFO L93 Difference]: Finished difference Result 42773 states and 166354 transitions. [2021-04-15 02:20:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:20:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:20:19,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:20,017 INFO L225 Difference]: With dead ends: 42773 [2021-04-15 02:20:20,017 INFO L226 Difference]: Without dead ends: 42759 [2021-04-15 02:20:20,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:20:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42759 states. [2021-04-15 02:20:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42759 to 41954. [2021-04-15 02:20:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41954 states, 41953 states have (on average 3.9150477915762876) internal successors, (164248), 41953 states have internal predecessors, (164248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41954 states to 41954 states and 164248 transitions. [2021-04-15 02:20:21,159 INFO L78 Accepts]: Start accepts. Automaton has 41954 states and 164248 transitions. Word has length 25 [2021-04-15 02:20:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 41954 states and 164248 transitions. [2021-04-15 02:20:21,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:20:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41954 states and 164248 transitions. [2021-04-15 02:20:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:21,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:21,245 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:21,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-04-15 02:20:21,445 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 53 times [2021-04-15 02:20:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:21,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514227431] [2021-04-15 02:20:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514227431] [2021-04-15 02:20:21,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748396744] [2021-04-15 02:20:21,522 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 [2021-04-15 02:20:21,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:20:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:21,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:21,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:20:21,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815491575] [2021-04-15 02:20:21,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:20:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:20:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:20:21,750 INFO L87 Difference]: Start difference. First operand 41954 states and 164248 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:20:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:23,450 INFO L93 Difference]: Finished difference Result 43033 states and 167158 transitions. [2021-04-15 02:20:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:20:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:20:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:23,563 INFO L225 Difference]: With dead ends: 43033 [2021-04-15 02:20:23,563 INFO L226 Difference]: Without dead ends: 43027 [2021-04-15 02:20:23,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1041.8ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:20:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43027 states. [2021-04-15 02:20:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43027 to 41948. [2021-04-15 02:20:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41948 states, 41947 states have (on average 3.914940281784156) internal successors, (164220), 41947 states have internal predecessors, (164220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41948 states to 41948 states and 164220 transitions. [2021-04-15 02:20:24,590 INFO L78 Accepts]: Start accepts. Automaton has 41948 states and 164220 transitions. Word has length 25 [2021-04-15 02:20:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:24,590 INFO L480 AbstractCegarLoop]: Abstraction has 41948 states and 164220 transitions. [2021-04-15 02:20:24,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:20:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41948 states and 164220 transitions. [2021-04-15 02:20:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:24,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:24,671 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:24,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:24,871 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 84 times [2021-04-15 02:20:24,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:24,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200183443] [2021-04-15 02:20:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:24,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200183443] [2021-04-15 02:20:24,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966642265] [2021-04-15 02:20:24,924 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 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 [2021-04-15 02:20:24,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:24,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:24,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:25,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:25,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365873726] [2021-04-15 02:20:25,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:25,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:25,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:25,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:25,130 INFO L87 Difference]: Start difference. First operand 41948 states and 164220 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:27,289 INFO L93 Difference]: Finished difference Result 59787 states and 225390 transitions. [2021-04-15 02:20:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 02:20:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:20:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:27,443 INFO L225 Difference]: With dead ends: 59787 [2021-04-15 02:20:27,443 INFO L226 Difference]: Without dead ends: 59763 [2021-04-15 02:20:27,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1200.1ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:20:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-04-15 02:20:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 41978. [2021-04-15 02:20:28,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41978 states, 41977 states have (on average 3.9149296043071207) internal successors, (164337), 41977 states have internal predecessors, (164337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41978 states to 41978 states and 164337 transitions. [2021-04-15 02:20:28,753 INFO L78 Accepts]: Start accepts. Automaton has 41978 states and 164337 transitions. Word has length 25 [2021-04-15 02:20:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:28,754 INFO L480 AbstractCegarLoop]: Abstraction has 41978 states and 164337 transitions. [2021-04-15 02:20:28,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 41978 states and 164337 transitions. [2021-04-15 02:20:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:28,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:28,822 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:29,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:29,022 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 85 times [2021-04-15 02:20:29,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:29,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5046757] [2021-04-15 02:20:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5046757] [2021-04-15 02:20:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146630739] [2021-04-15 02:20:29,102 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) [2021-04-15 02:20:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:29,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:29,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37905372] [2021-04-15 02:20:29,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:29,360 INFO L87 Difference]: Start difference. First operand 41978 states and 164337 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:31,185 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-04-15 02:20:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:31,422 INFO L93 Difference]: Finished difference Result 58211 states and 220785 transitions. [2021-04-15 02:20:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:20:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 [2021-04-15 02:20:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:31,595 INFO L225 Difference]: With dead ends: 58211 [2021-04-15 02:20:31,595 INFO L226 Difference]: Without dead ends: 58187 [2021-04-15 02:20:31,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:20:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58187 states. [2021-04-15 02:20:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58187 to 41944. [2021-04-15 02:20:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41944 states, 41943 states have (on average 3.9150513792527954) internal successors, (164209), 41943 states have internal predecessors, (164209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41944 states to 41944 states and 164209 transitions. [2021-04-15 02:20:32,850 INFO L78 Accepts]: Start accepts. Automaton has 41944 states and 164209 transitions. Word has length 25 [2021-04-15 02:20:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:32,851 INFO L480 AbstractCegarLoop]: Abstraction has 41944 states and 164209 transitions. [2021-04-15 02:20:32,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 41944 states and 164209 transitions. [2021-04-15 02:20:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:32,922 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:32,922 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:33,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-04-15 02:20:33,122 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 86 times [2021-04-15 02:20:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:33,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079100407] [2021-04-15 02:20:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079100407] [2021-04-15 02:20:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753321266] [2021-04-15 02:20:33,186 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 [2021-04-15 02:20:33,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:33,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:33,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:33,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:33,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908123128] [2021-04-15 02:20:33,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:33,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:33,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:33,402 INFO L87 Difference]: Start difference. First operand 41944 states and 164209 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:35,402 INFO L93 Difference]: Finished difference Result 74727 states and 277787 transitions. [2021-04-15 02:20:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:20:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:20:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:35,631 INFO L225 Difference]: With dead ends: 74727 [2021-04-15 02:20:35,631 INFO L226 Difference]: Without dead ends: 74727 [2021-04-15 02:20:35,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:20:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74727 states. [2021-04-15 02:20:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74727 to 41961. [2021-04-15 02:20:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41961 states, 41960 states have (on average 3.915610104861773) internal successors, (164299), 41960 states have internal predecessors, (164299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41961 states to 41961 states and 164299 transitions. [2021-04-15 02:20:37,089 INFO L78 Accepts]: Start accepts. Automaton has 41961 states and 164299 transitions. Word has length 25 [2021-04-15 02:20:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:37,089 INFO L480 AbstractCegarLoop]: Abstraction has 41961 states and 164299 transitions. [2021-04-15 02:20:37,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 41961 states and 164299 transitions. [2021-04-15 02:20:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:37,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:37,168 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:37,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:37,368 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 87 times [2021-04-15 02:20:37,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:37,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731697217] [2021-04-15 02:20:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731697217] [2021-04-15 02:20:37,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544730406] [2021-04-15 02:20:37,427 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 [2021-04-15 02:20:37,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:20:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:37,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:37,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:37,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838036694] [2021-04-15 02:20:37,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:37,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:37,616 INFO L87 Difference]: Start difference. First operand 41961 states and 164299 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:20:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:39,606 INFO L93 Difference]: Finished difference Result 69090 states and 258749 transitions. [2021-04-15 02:20:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:20:39,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:20:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:39,802 INFO L225 Difference]: With dead ends: 69090 [2021-04-15 02:20:39,803 INFO L226 Difference]: Without dead ends: 69068 [2021-04-15 02:20:39,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:20:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69068 states. [2021-04-15 02:20:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69068 to 41907. [2021-04-15 02:20:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41907 states, 41906 states have (on average 3.9144752541402186) internal successors, (164040), 41906 states have internal predecessors, (164040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41907 states to 41907 states and 164040 transitions. [2021-04-15 02:20:41,122 INFO L78 Accepts]: Start accepts. Automaton has 41907 states and 164040 transitions. Word has length 25 [2021-04-15 02:20:41,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:41,122 INFO L480 AbstractCegarLoop]: Abstraction has 41907 states and 164040 transitions. [2021-04-15 02:20:41,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:20:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 41907 states and 164040 transitions. [2021-04-15 02:20:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:41,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:41,194 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:41,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:41,395 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1463635770, now seen corresponding path program 54 times [2021-04-15 02:20:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:41,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774327943] [2021-04-15 02:20:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:41,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774327943] [2021-04-15 02:20:41,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467720954] [2021-04-15 02:20:41,435 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 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 [2021-04-15 02:20:41,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:20:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:41,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:41,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 02:20:41,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146338344] [2021-04-15 02:20:41,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:20:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:41,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:20:41,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:20:41,567 INFO L87 Difference]: Start difference. First operand 41907 states and 164040 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-04-15 02:20:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:42,350 INFO L93 Difference]: Finished difference Result 48500 states and 183886 transitions. [2021-04-15 02:20:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:20:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 [2021-04-15 02:20:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:42,475 INFO L225 Difference]: With dead ends: 48500 [2021-04-15 02:20:42,475 INFO L226 Difference]: Without dead ends: 48470 [2021-04-15 02:20:42,475 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:20:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2021-04-15 02:20:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 42003. [2021-04-15 02:20:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42003 states, 42002 states have (on average 3.912337507737727) internal successors, (164326), 42002 states have internal predecessors, (164326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42003 states to 42003 states and 164326 transitions. [2021-04-15 02:20:43,712 INFO L78 Accepts]: Start accepts. Automaton has 42003 states and 164326 transitions. Word has length 25 [2021-04-15 02:20:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:43,712 INFO L480 AbstractCegarLoop]: Abstraction has 42003 states and 164326 transitions. [2021-04-15 02:20:43,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-04-15 02:20:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 42003 states and 164326 transitions. [2021-04-15 02:20:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:43,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:43,793 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:43,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:20:43,993 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 88 times [2021-04-15 02:20:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:43,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148465533] [2021-04-15 02:20:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148465533] [2021-04-15 02:20:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606407089] [2021-04-15 02:20:44,062 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 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 [2021-04-15 02:20:44,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:20:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:44,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:44,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:44,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226327985] [2021-04-15 02:20:44,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:44,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:44,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:44,297 INFO L87 Difference]: Start difference. First operand 42003 states and 164326 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:45,616 INFO L93 Difference]: Finished difference Result 56025 states and 212844 transitions. [2021-04-15 02:20:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:20:45,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 [2021-04-15 02:20:45,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:46,138 INFO L225 Difference]: With dead ends: 56025 [2021-04-15 02:20:46,139 INFO L226 Difference]: Without dead ends: 56001 [2021-04-15 02:20:46,139 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:20:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56001 states. [2021-04-15 02:20:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56001 to 42023. [2021-04-15 02:20:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42023 states, 42022 states have (on average 3.912284041692447) internal successors, (164402), 42022 states have internal predecessors, (164402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42023 states to 42023 states and 164402 transitions. [2021-04-15 02:20:47,436 INFO L78 Accepts]: Start accepts. Automaton has 42023 states and 164402 transitions. Word has length 25 [2021-04-15 02:20:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:47,436 INFO L480 AbstractCegarLoop]: Abstraction has 42023 states and 164402 transitions. [2021-04-15 02:20:47,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-04-15 02:20:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 42023 states and 164402 transitions. [2021-04-15 02:20:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:47,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:47,514 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:47,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-04-15 02:20:47,715 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:47,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:47,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 89 times [2021-04-15 02:20:47,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:47,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150522292] [2021-04-15 02:20:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150522292] [2021-04-15 02:20:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455752895] [2021-04-15 02:20:47,770 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 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 [2021-04-15 02:20:47,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:20:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:47,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:47,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:47,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391426773] [2021-04-15 02:20:47,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:47,986 INFO L87 Difference]: Start difference. First operand 42023 states and 164402 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:48,990 INFO L93 Difference]: Finished difference Result 54579 states and 208472 transitions. [2021-04-15 02:20:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:20:48,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 [2021-04-15 02:20:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:49,133 INFO L225 Difference]: With dead ends: 54579 [2021-04-15 02:20:49,133 INFO L226 Difference]: Without dead ends: 54555 [2021-04-15 02:20:49,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:20:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54555 states. [2021-04-15 02:20:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54555 to 41995. [2021-04-15 02:20:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41995 states, 41994 states have (on average 3.9124636852883747) internal successors, (164300), 41994 states have internal predecessors, (164300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41995 states to 41995 states and 164300 transitions. [2021-04-15 02:20:50,273 INFO L78 Accepts]: Start accepts. Automaton has 41995 states and 164300 transitions. Word has length 25 [2021-04-15 02:20:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:50,273 INFO L480 AbstractCegarLoop]: Abstraction has 41995 states and 164300 transitions. [2021-04-15 02:20:50,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41995 states and 164300 transitions. [2021-04-15 02:20:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:50,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:50,350 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:50,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-04-15 02:20:50,550 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:50,551 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 90 times [2021-04-15 02:20:50,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:50,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103305625] [2021-04-15 02:20:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103305625] [2021-04-15 02:20:50,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100059509] [2021-04-15 02:20:50,626 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 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 [2021-04-15 02:20:50,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:20:50,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:50,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:50,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:50,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313135974] [2021-04-15 02:20:50,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:50,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:50,837 INFO L87 Difference]: Start difference. First operand 41995 states and 164300 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:51,653 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-04-15 02:20:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:52,126 INFO L93 Difference]: Finished difference Result 54843 states and 209486 transitions. [2021-04-15 02:20:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:20:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 [2021-04-15 02:20:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:52,285 INFO L225 Difference]: With dead ends: 54843 [2021-04-15 02:20:52,285 INFO L226 Difference]: Without dead ends: 54815 [2021-04-15 02:20:52,285 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:20:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54815 states. [2021-04-15 02:20:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54815 to 41993. [2021-04-15 02:20:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41993 states, 41992 states have (on average 3.912554772337588) internal successors, (164296), 41992 states have internal predecessors, (164296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41993 states to 41993 states and 164296 transitions. [2021-04-15 02:20:53,438 INFO L78 Accepts]: Start accepts. Automaton has 41993 states and 164296 transitions. Word has length 25 [2021-04-15 02:20:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:53,438 INFO L480 AbstractCegarLoop]: Abstraction has 41993 states and 164296 transitions. [2021-04-15 02:20:53,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 02:20:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 41993 states and 164296 transitions. [2021-04-15 02:20:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:53,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:53,504 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:53,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-04-15 02:20:53,704 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 91 times [2021-04-15 02:20:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:53,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148141608] [2021-04-15 02:20:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:53,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148141608] [2021-04-15 02:20:53,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991612946] [2021-04-15 02:20:53,779 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 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 [2021-04-15 02:20:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:53,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:54,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:54,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:54,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789361048] [2021-04-15 02:20:54,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:54,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:54,022 INFO L87 Difference]: Start difference. First operand 41993 states and 164296 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:20:56,328 INFO L93 Difference]: Finished difference Result 74134 states and 278512 transitions. [2021-04-15 02:20:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 02:20:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:20:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:20:56,542 INFO L225 Difference]: With dead ends: 74134 [2021-04-15 02:20:56,543 INFO L226 Difference]: Without dead ends: 74134 [2021-04-15 02:20:56,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1343.8ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:20:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74134 states. [2021-04-15 02:20:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74134 to 41984. [2021-04-15 02:20:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41984 states, 41983 states have (on average 3.9122501965081105) internal successors, (164248), 41983 states have internal predecessors, (164248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:20:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41984 states to 41984 states and 164248 transitions. [2021-04-15 02:20:57,850 INFO L78 Accepts]: Start accepts. Automaton has 41984 states and 164248 transitions. Word has length 25 [2021-04-15 02:20:57,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:20:57,850 INFO L480 AbstractCegarLoop]: Abstraction has 41984 states and 164248 transitions. [2021-04-15 02:20:57,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:20:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41984 states and 164248 transitions. [2021-04-15 02:20:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:20:57,918 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:20:57,918 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:20:58,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-04-15 02:20:58,119 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:20:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:20:58,119 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 92 times [2021-04-15 02:20:58,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:20:58,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603670924] [2021-04-15 02:20:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:20:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:20:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603670924] [2021-04-15 02:20:58,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945265372] [2021-04-15 02:20:58,185 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 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 [2021-04-15 02:20:58,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:20:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:20:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:20:58,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:20:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:20:58,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:20:58,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:20:58,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055783380] [2021-04-15 02:20:58,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:20:58,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:20:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:20:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:20:58,400 INFO L87 Difference]: Start difference. First operand 41984 states and 164248 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:21:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:00,584 INFO L93 Difference]: Finished difference Result 71663 states and 269937 transitions. [2021-04-15 02:21:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 02:21:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:21:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:00,777 INFO L225 Difference]: With dead ends: 71663 [2021-04-15 02:21:00,777 INFO L226 Difference]: Without dead ends: 71645 [2021-04-15 02:21:00,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1306.5ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 02:21:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71645 states. [2021-04-15 02:21:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71645 to 41971. [2021-04-15 02:21:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41971 states, 41970 states have (on average 3.911984751012628) internal successors, (164186), 41970 states have internal predecessors, (164186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41971 states to 41971 states and 164186 transitions. [2021-04-15 02:21:02,081 INFO L78 Accepts]: Start accepts. Automaton has 41971 states and 164186 transitions. Word has length 25 [2021-04-15 02:21:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:02,081 INFO L480 AbstractCegarLoop]: Abstraction has 41971 states and 164186 transitions. [2021-04-15 02:21:02,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:21:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 41971 states and 164186 transitions. [2021-04-15 02:21:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:02,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:02,150 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:02,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 02:21:02,351 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 93 times [2021-04-15 02:21:02,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:02,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144828177] [2021-04-15 02:21:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144828177] [2021-04-15 02:21:02,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231033378] [2021-04-15 02:21:02,421 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 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 [2021-04-15 02:21:02,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:21:02,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:21:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:02,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:02,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:21:02,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917802860] [2021-04-15 02:21:02,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:02,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:02,607 INFO L87 Difference]: Start difference. First operand 41971 states and 164186 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:21:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:04,498 INFO L93 Difference]: Finished difference Result 59035 states and 223208 transitions. [2021-04-15 02:21:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:21:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 02:21:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:04,657 INFO L225 Difference]: With dead ends: 59035 [2021-04-15 02:21:04,657 INFO L226 Difference]: Without dead ends: 59009 [2021-04-15 02:21:04,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1098.8ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:21:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-04-15 02:21:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 41946. [2021-04-15 02:21:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41946 states, 41945 states have (on average 3.912075336750507) internal successors, (164092), 41945 states have internal predecessors, (164092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41946 states to 41946 states and 164092 transitions. [2021-04-15 02:21:05,882 INFO L78 Accepts]: Start accepts. Automaton has 41946 states and 164092 transitions. Word has length 25 [2021-04-15 02:21:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:05,882 INFO L480 AbstractCegarLoop]: Abstraction has 41946 states and 164092 transitions. [2021-04-15 02:21:05,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 02:21:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 41946 states and 164092 transitions. [2021-04-15 02:21:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:05,957 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:05,957 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:06,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-04-15 02:21:06,158 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 94 times [2021-04-15 02:21:06,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:06,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611509887] [2021-04-15 02:21:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611509887] [2021-04-15 02:21:06,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570912791] [2021-04-15 02:21:06,223 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 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 [2021-04-15 02:21:06,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:06,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:21:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:06,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:06,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-04-15 02:21:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550214020] [2021-04-15 02:21:06,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:21:06,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:21:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:21:06,418 INFO L87 Difference]: Start difference. First operand 41946 states and 164092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:21:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:08,943 INFO L93 Difference]: Finished difference Result 70144 states and 262472 transitions. [2021-04-15 02:21:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:21:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 [2021-04-15 02:21:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:09,143 INFO L225 Difference]: With dead ends: 70144 [2021-04-15 02:21:09,143 INFO L226 Difference]: Without dead ends: 70123 [2021-04-15 02:21:09,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1313.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:21:09,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-04-15 02:21:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 45168. [2021-04-15 02:21:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45168 states, 45167 states have (on average 3.9203622113489938) internal successors, (177071), 45167 states have internal predecessors, (177071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45168 states to 45168 states and 177071 transitions. [2021-04-15 02:21:10,557 INFO L78 Accepts]: Start accepts. Automaton has 45168 states and 177071 transitions. Word has length 25 [2021-04-15 02:21:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:10,557 INFO L480 AbstractCegarLoop]: Abstraction has 45168 states and 177071 transitions. [2021-04-15 02:21:10,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2021-04-15 02:21:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 45168 states and 177071 transitions. [2021-04-15 02:21:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:10,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:10,641 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:10,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:10,841 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 95 times [2021-04-15 02:21:10,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:10,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574417267] [2021-04-15 02:21:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:10,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574417267] [2021-04-15 02:21:10,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937770775] [2021-04-15 02:21:10,936 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 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 [2021-04-15 02:21:10,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:21:10,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:10,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:21:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:11,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:11,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 02:21:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862920234] [2021-04-15 02:21:11,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:11,200 INFO L87 Difference]: Start difference. First operand 45168 states and 177071 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:21:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:13,918 INFO L93 Difference]: Finished difference Result 69522 states and 260487 transitions. [2021-04-15 02:21:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 02:21:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:21:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:14,120 INFO L225 Difference]: With dead ends: 69522 [2021-04-15 02:21:14,120 INFO L226 Difference]: Without dead ends: 69522 [2021-04-15 02:21:14,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1630.1ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 02:21:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69522 states. [2021-04-15 02:21:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69522 to 45166. [2021-04-15 02:21:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 3.9201815565150007) internal successors, (177055), 45165 states have internal predecessors, (177055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 177055 transitions. [2021-04-15 02:21:15,469 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 177055 transitions. Word has length 25 [2021-04-15 02:21:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:15,469 INFO L480 AbstractCegarLoop]: Abstraction has 45166 states and 177055 transitions. [2021-04-15 02:21:15,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:21:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 177055 transitions. [2021-04-15 02:21:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:15,548 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:15,548 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:15,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:15,748 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 96 times [2021-04-15 02:21:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:15,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595475909] [2021-04-15 02:21:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:15,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595475909] [2021-04-15 02:21:15,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747902198] [2021-04-15 02:21:15,841 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 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 [2021-04-15 02:21:15,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:21:15,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:21:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:16,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:16,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 02:21:16,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064375910] [2021-04-15 02:21:16,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:16,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:16,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:16,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:16,070 INFO L87 Difference]: Start difference. First operand 45166 states and 177055 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-04-15 02:21:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:18,491 INFO L93 Difference]: Finished difference Result 66133 states and 248811 transitions. [2021-04-15 02:21:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 02:21:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 [2021-04-15 02:21:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:18,674 INFO L225 Difference]: With dead ends: 66133 [2021-04-15 02:21:18,674 INFO L226 Difference]: Without dead ends: 66119 [2021-04-15 02:21:18,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1464.3ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 02:21:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66119 states. [2021-04-15 02:21:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66119 to 45154. [2021-04-15 02:21:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45154 states, 45153 states have (on average 3.9200939029521846) internal successors, (177004), 45153 states have internal predecessors, (177004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45154 states to 45154 states and 177004 transitions. [2021-04-15 02:21:20,007 INFO L78 Accepts]: Start accepts. Automaton has 45154 states and 177004 transitions. Word has length 25 [2021-04-15 02:21:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:20,007 INFO L480 AbstractCegarLoop]: Abstraction has 45154 states and 177004 transitions. [2021-04-15 02:21:20,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-04-15 02:21:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 45154 states and 177004 transitions. [2021-04-15 02:21:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:20,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:20,092 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:20,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:20,293 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:20,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:20,293 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 97 times [2021-04-15 02:21:20,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:20,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485032033] [2021-04-15 02:21:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485032033] [2021-04-15 02:21:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163845678] [2021-04-15 02:21:20,381 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 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 [2021-04-15 02:21:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:20,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:21:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:20,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:20,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 02:21:20,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210059595] [2021-04-15 02:21:20,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:20,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:20,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:20,623 INFO L87 Difference]: Start difference. First operand 45154 states and 177004 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-04-15 02:21:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:22,558 INFO L93 Difference]: Finished difference Result 60933 states and 232778 transitions. [2021-04-15 02:21:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 02:21:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 [2021-04-15 02:21:22,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:22,715 INFO L225 Difference]: With dead ends: 60933 [2021-04-15 02:21:22,715 INFO L226 Difference]: Without dead ends: 60909 [2021-04-15 02:21:22,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1132.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:21:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60909 states. [2021-04-15 02:21:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60909 to 45110. [2021-04-15 02:21:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45110 states, 45109 states have (on average 3.9205258374160366) internal successors, (176851), 45109 states have internal predecessors, (176851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45110 states to 45110 states and 176851 transitions. [2021-04-15 02:21:24,049 INFO L78 Accepts]: Start accepts. Automaton has 45110 states and 176851 transitions. Word has length 25 [2021-04-15 02:21:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:24,049 INFO L480 AbstractCegarLoop]: Abstraction has 45110 states and 176851 transitions. [2021-04-15 02:21:24,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2021-04-15 02:21:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 45110 states and 176851 transitions. [2021-04-15 02:21:24,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:24,129 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:24,129 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:24,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:24,329 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 55 times [2021-04-15 02:21:24,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:24,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078724708] [2021-04-15 02:21:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:24,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078724708] [2021-04-15 02:21:24,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480450039] [2021-04-15 02:21:24,465 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 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 [2021-04-15 02:21:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:24,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:24,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:21:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46268116] [2021-04-15 02:21:24,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:24,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:24,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:24,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:24,732 INFO L87 Difference]: Start difference. First operand 45110 states and 176851 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:21:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:25,730 INFO L93 Difference]: Finished difference Result 46027 states and 179343 transitions. [2021-04-15 02:21:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:21:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 [2021-04-15 02:21:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:25,846 INFO L225 Difference]: With dead ends: 46027 [2021-04-15 02:21:25,847 INFO L226 Difference]: Without dead ends: 46020 [2021-04-15 02:21:25,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:21:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46020 states. [2021-04-15 02:21:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46020 to 45203. [2021-04-15 02:21:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45203 states, 45202 states have (on average 3.919538958453166) internal successors, (177171), 45202 states have internal predecessors, (177171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45203 states to 45203 states and 177171 transitions. [2021-04-15 02:21:27,061 INFO L78 Accepts]: Start accepts. Automaton has 45203 states and 177171 transitions. Word has length 25 [2021-04-15 02:21:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:27,061 INFO L480 AbstractCegarLoop]: Abstraction has 45203 states and 177171 transitions. [2021-04-15 02:21:27,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-04-15 02:21:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45203 states and 177171 transitions. [2021-04-15 02:21:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:27,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:27,141 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:27,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:27,341 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 56 times [2021-04-15 02:21:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932443524] [2021-04-15 02:21:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:27,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932443524] [2021-04-15 02:21:27,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909358758] [2021-04-15 02:21:27,418 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:27,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:27,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:27,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:21:27,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139714872] [2021-04-15 02:21:27,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:27,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:27,665 INFO L87 Difference]: Start difference. First operand 45203 states and 177171 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:21:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:29,160 INFO L93 Difference]: Finished difference Result 46188 states and 179849 transitions. [2021-04-15 02:21:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:21:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-04-15 02:21:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:29,288 INFO L225 Difference]: With dead ends: 46188 [2021-04-15 02:21:29,288 INFO L226 Difference]: Without dead ends: 46188 [2021-04-15 02:21:29,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:21:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46188 states. [2021-04-15 02:21:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46188 to 45098. [2021-04-15 02:21:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45098 states, 45097 states have (on average 3.9206599108588156) internal successors, (176810), 45097 states have internal predecessors, (176810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45098 states to 45098 states and 176810 transitions. [2021-04-15 02:21:30,400 INFO L78 Accepts]: Start accepts. Automaton has 45098 states and 176810 transitions. Word has length 25 [2021-04-15 02:21:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:30,400 INFO L480 AbstractCegarLoop]: Abstraction has 45098 states and 176810 transitions. [2021-04-15 02:21:30,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 02:21:30,400 INFO L276 IsEmpty]: Start isEmpty. Operand 45098 states and 176810 transitions. [2021-04-15 02:21:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:30,478 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:30,478 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:30,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:30,678 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 13 times [2021-04-15 02:21:30,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:30,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521138301] [2021-04-15 02:21:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:30,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521138301] [2021-04-15 02:21:30,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519691338] [2021-04-15 02:21:30,784 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 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 [2021-04-15 02:21:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:30,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:30,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:31,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:31,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 02:21:31,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371349959] [2021-04-15 02:21:31,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:21:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:21:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:21:31,066 INFO L87 Difference]: Start difference. First operand 45098 states and 176810 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:21:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:32,378 INFO L93 Difference]: Finished difference Result 45514 states and 177888 transitions. [2021-04-15 02:21:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:21:32,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-04-15 02:21:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:32,497 INFO L225 Difference]: With dead ends: 45514 [2021-04-15 02:21:32,497 INFO L226 Difference]: Without dead ends: 45514 [2021-04-15 02:21:32,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:21:32,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45514 states. [2021-04-15 02:21:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45514 to 45166. [2021-04-15 02:21:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 3.919406620170486) internal successors, (177020), 45165 states have internal predecessors, (177020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 177020 transitions. [2021-04-15 02:21:33,766 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 177020 transitions. Word has length 25 [2021-04-15 02:21:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:33,767 INFO L480 AbstractCegarLoop]: Abstraction has 45166 states and 177020 transitions. [2021-04-15 02:21:33,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 02:21:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 177020 transitions. [2021-04-15 02:21:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:33,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:33,845 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:34,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 02:21:34,046 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:34,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 14 times [2021-04-15 02:21:34,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:34,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731755763] [2021-04-15 02:21:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:34,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731755763] [2021-04-15 02:21:34,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077324156] [2021-04-15 02:21:34,101 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 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 [2021-04-15 02:21:34,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:21:34,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:21:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:34,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:34,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 02:21:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551315127] [2021-04-15 02:21:34,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:21:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:34,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:21:34,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:21:34,247 INFO L87 Difference]: Start difference. First operand 45166 states and 177020 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-04-15 02:21:34,656 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-04-15 02:21:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:35,184 INFO L93 Difference]: Finished difference Result 72292 states and 278253 transitions. [2021-04-15 02:21:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:21:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 [2021-04-15 02:21:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:35,414 INFO L225 Difference]: With dead ends: 72292 [2021-04-15 02:21:35,415 INFO L226 Difference]: Without dead ends: 72266 [2021-04-15 02:21:35,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72266 states. [2021-04-15 02:21:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72266 to 59431. [2021-04-15 02:21:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59431 states, 59430 states have (on average 3.973548712771328) internal successors, (236148), 59430 states have internal predecessors, (236148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59431 states to 59431 states and 236148 transitions. [2021-04-15 02:21:37,164 INFO L78 Accepts]: Start accepts. Automaton has 59431 states and 236148 transitions. Word has length 25 [2021-04-15 02:21:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:37,164 INFO L480 AbstractCegarLoop]: Abstraction has 59431 states and 236148 transitions. [2021-04-15 02:21:37,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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) [2021-04-15 02:21:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 59431 states and 236148 transitions. [2021-04-15 02:21:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:37,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:37,272 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:37,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:37,473 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 15 times [2021-04-15 02:21:37,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:37,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908294493] [2021-04-15 02:21:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:37,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908294493] [2021-04-15 02:21:37,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997532693] [2021-04-15 02:21:37,527 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 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 [2021-04-15 02:21:37,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:21:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:37,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:38,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:38,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:21:38,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818425733] [2021-04-15 02:21:38,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:38,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:38,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:38,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:38,148 INFO L87 Difference]: Start difference. First operand 59431 states and 236148 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:21:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:39,393 INFO L93 Difference]: Finished difference Result 60679 states and 239362 transitions. [2021-04-15 02:21:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:21:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:21:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:39,564 INFO L225 Difference]: With dead ends: 60679 [2021-04-15 02:21:39,564 INFO L226 Difference]: Without dead ends: 60679 [2021-04-15 02:21:39,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1127.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 02:21:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60679 states. [2021-04-15 02:21:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60679 to 59583. [2021-04-15 02:21:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59583 states, 59582 states have (on average 3.9715350273572554) internal successors, (236632), 59582 states have internal predecessors, (236632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:41,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59583 states to 59583 states and 236632 transitions. [2021-04-15 02:21:41,080 INFO L78 Accepts]: Start accepts. Automaton has 59583 states and 236632 transitions. Word has length 25 [2021-04-15 02:21:41,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:41,080 INFO L480 AbstractCegarLoop]: Abstraction has 59583 states and 236632 transitions. [2021-04-15 02:21:41,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:21:41,081 INFO L276 IsEmpty]: Start isEmpty. Operand 59583 states and 236632 transitions. [2021-04-15 02:21:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:41,198 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:41,198 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:41,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 02:21:41,399 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 16 times [2021-04-15 02:21:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:41,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87936843] [2021-04-15 02:21:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:41,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87936843] [2021-04-15 02:21:41,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128200512] [2021-04-15 02:21:41,448 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 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 [2021-04-15 02:21:41,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:21:41,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:21:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:41,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-04-15 02:21:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491650239] [2021-04-15 02:21:41,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:21:41,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:21:41,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:21:41,602 INFO L87 Difference]: Start difference. First operand 59583 states and 236632 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-04-15 02:21:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:42,628 INFO L93 Difference]: Finished difference Result 82434 states and 312359 transitions. [2021-04-15 02:21:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:21:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 [2021-04-15 02:21:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:42,853 INFO L225 Difference]: With dead ends: 82434 [2021-04-15 02:21:42,853 INFO L226 Difference]: Without dead ends: 82434 [2021-04-15 02:21:42,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:21:42,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82434 states. [2021-04-15 02:21:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82434 to 57923. [2021-04-15 02:21:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57923 states, 57922 states have (on average 3.962294119678188) internal successors, (229504), 57922 states have internal predecessors, (229504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57923 states to 57923 states and 229504 transitions. [2021-04-15 02:21:44,616 INFO L78 Accepts]: Start accepts. Automaton has 57923 states and 229504 transitions. Word has length 25 [2021-04-15 02:21:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:44,616 INFO L480 AbstractCegarLoop]: Abstraction has 57923 states and 229504 transitions. [2021-04-15 02:21:44,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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) [2021-04-15 02:21:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 57923 states and 229504 transitions. [2021-04-15 02:21:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:44,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:44,723 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:44,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:44,923 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 17 times [2021-04-15 02:21:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:44,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415791611] [2021-04-15 02:21:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:45,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415791611] [2021-04-15 02:21:45,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917976087] [2021-04-15 02:21:45,370 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 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 [2021-04-15 02:21:45,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:21:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:45,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:45,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:21:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221540054] [2021-04-15 02:21:45,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:45,623 INFO L87 Difference]: Start difference. First operand 57923 states and 229504 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:21:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:46,967 INFO L93 Difference]: Finished difference Result 58661 states and 231313 transitions. [2021-04-15 02:21:46,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:21:46,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 [2021-04-15 02:21:46,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:47,142 INFO L225 Difference]: With dead ends: 58661 [2021-04-15 02:21:47,142 INFO L226 Difference]: Without dead ends: 58654 [2021-04-15 02:21:47,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 780.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:21:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58654 states. [2021-04-15 02:21:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58654 to 57923. [2021-04-15 02:21:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57923 states, 57922 states have (on average 3.962259590483754) internal successors, (229502), 57922 states have internal predecessors, (229502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57923 states to 57923 states and 229502 transitions. [2021-04-15 02:21:48,598 INFO L78 Accepts]: Start accepts. Automaton has 57923 states and 229502 transitions. Word has length 25 [2021-04-15 02:21:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:48,598 INFO L480 AbstractCegarLoop]: Abstraction has 57923 states and 229502 transitions. [2021-04-15 02:21:48,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-04-15 02:21:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 57923 states and 229502 transitions. [2021-04-15 02:21:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:48,706 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:48,706 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:48,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:48,907 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 18 times [2021-04-15 02:21:48,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:48,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253547978] [2021-04-15 02:21:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:48,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253547978] [2021-04-15 02:21:48,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684472472] [2021-04-15 02:21:48,959 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 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 [2021-04-15 02:21:48,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:21:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:21:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 02:21:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:49,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:49,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 02:21:49,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193336633] [2021-04-15 02:21:49,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:21:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:21:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:21:49,217 INFO L87 Difference]: Start difference. First operand 57923 states and 229502 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:21:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:51,149 INFO L93 Difference]: Finished difference Result 59862 states and 234684 transitions. [2021-04-15 02:21:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:21:51,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 [2021-04-15 02:21:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:51,325 INFO L225 Difference]: With dead ends: 59862 [2021-04-15 02:21:51,325 INFO L226 Difference]: Without dead ends: 59862 [2021-04-15 02:21:51,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:21:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59862 states. [2021-04-15 02:21:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59862 to 58277. [2021-04-15 02:21:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58277 states, 58276 states have (on average 3.957735602992656) internal successors, (230641), 58276 states have internal predecessors, (230641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58277 states to 58277 states and 230641 transitions. [2021-04-15 02:21:52,815 INFO L78 Accepts]: Start accepts. Automaton has 58277 states and 230641 transitions. Word has length 25 [2021-04-15 02:21:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:52,815 INFO L480 AbstractCegarLoop]: Abstraction has 58277 states and 230641 transitions. [2021-04-15 02:21:52,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-04-15 02:21:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 58277 states and 230641 transitions. [2021-04-15 02:21:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:52,923 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:52,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:21:53,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-04-15 02:21:53,123 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 19 times [2021-04-15 02:21:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:53,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442017957] [2021-04-15 02:21:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:21:53,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442017957] [2021-04-15 02:21:53,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853225905] [2021-04-15 02:21:53,163 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 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 [2021-04-15 02:21:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:21:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:21:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:21:53,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:21:53,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 02:21:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105554877] [2021-04-15 02:21:53,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:21:53,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:21:53,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:21:53,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:21:53,328 INFO L87 Difference]: Start difference. First operand 58277 states and 230641 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-04-15 02:21:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:21:54,358 INFO L93 Difference]: Finished difference Result 80678 states and 310924 transitions. [2021-04-15 02:21:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:21:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 [2021-04-15 02:21:54,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:21:54,595 INFO L225 Difference]: With dead ends: 80678 [2021-04-15 02:21:54,595 INFO L226 Difference]: Without dead ends: 80672 [2021-04-15 02:21:54,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:21:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80672 states. [2021-04-15 02:21:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80672 to 64580. [2021-04-15 02:21:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64580 states, 64579 states have (on average 3.9736911379860325) internal successors, (256617), 64579 states have internal predecessors, (256617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:21:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64580 states to 64580 states and 256617 transitions. [2021-04-15 02:21:56,735 INFO L78 Accepts]: Start accepts. Automaton has 64580 states and 256617 transitions. Word has length 25 [2021-04-15 02:21:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:21:56,735 INFO L480 AbstractCegarLoop]: Abstraction has 64580 states and 256617 transitions. [2021-04-15 02:21:56,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2021-04-15 02:21:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 64580 states and 256617 transitions. [2021-04-15 02:21:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:21:56,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:21:56,854 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forcibly destroying the process [2021-04-15 02:21:57,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:21:57,054 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:21:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:21:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 20 times [2021-04-15 02:21:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:21:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441151015] [2021-04-15 02:21:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:21:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:21:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:21:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441151015] [2021-04-15 02:21:57,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153326683] [2021-04-15 02:21:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3