/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/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:27:20,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:27:20,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:27:20,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:27:20,527 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 03:27:20,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:27:20,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:27:20,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:27:20,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:27:20,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:27:20,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:27:20,566 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:27:20,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:27:20,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:27:20,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:27:20,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:27:20,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:27:20,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:27:20,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:27:20,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:27:20,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:27:20,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:27:20,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:27:20,571 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:27:20,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:27:20,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:27:20,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:27:20,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:27:20,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:27:20,930 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:27:20,932 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:27:20,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-04-15 03:27:20,934 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-04-15 03:27:21,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:27:21,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:27:21,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:27:21,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:27:21,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:27:21,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:27:21,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:27:21,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:27:21,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:27:21,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/1) ... [2021-04-15 03:27:21,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:27:21,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:27:21,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:27:21,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:27:21,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (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 03:27:21,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:27:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:27:21,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:27:21,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:27:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:27:21,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:27:21,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:27:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:27:21,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:27:21,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:27:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:27:21,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:27:21,136 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 03:27:21,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:27:21,363 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:27:21,365 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:27:21 BoogieIcfgContainer [2021-04-15 03:27:21,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:27:21,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:27:21,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:27:21,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:27:21,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:27:21" (1/2) ... [2021-04-15 03:27:21,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77dabfb6 and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:27:21, skipping insertion in model container [2021-04-15 03:27:21,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:27:21" (2/2) ... [2021-04-15 03:27:21,376 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-04-15 03:27:21,381 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:27:21,381 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:27:21,384 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:27:21,385 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:27:21,448 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 03:27:21,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 03:27:21,478 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:27:21,478 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:27:21,479 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:27:21,479 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:27:21,479 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:27:21,479 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:27:21,479 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:27:21,479 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:27:21,487 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-04-15 03:27:21,504 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 03:27:21,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:21,515 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:21,515 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:21,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-04-15 03:27:21,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:21,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723097393] [2021-04-15 03:27:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:21,677 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 03:27:21,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723097393] [2021-04-15 03:27:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:27:21,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 03:27:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748498416] [2021-04-15 03:27:21,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:27:21,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:27:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:27:21,710 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:21,758 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-04-15 03:27:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:27:21,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 03:27:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:21,769 INFO L225 Difference]: With dead ends: 84 [2021-04-15 03:27:21,769 INFO L226 Difference]: Without dead ends: 56 [2021-04-15 03:27:21,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:27:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-04-15 03:27:21,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-04-15 03:27:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-04-15 03:27:21,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-04-15 03:27:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:21,817 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-04-15 03:27:21,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-04-15 03:27:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 03:27:21,819 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:21,819 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:21,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:27:21,820 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-04-15 03:27:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:21,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799001750] [2021-04-15 03:27:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:21,881 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 03:27:21,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799001750] [2021-04-15 03:27:21,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:27:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:27:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900267296] [2021-04-15 03:27:21,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:27:21,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:27:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:27:21,888 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:21,936 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-04-15 03:27:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:27:21,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 03:27:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:21,942 INFO L225 Difference]: With dead ends: 80 [2021-04-15 03:27:21,942 INFO L226 Difference]: Without dead ends: 66 [2021-04-15 03:27:21,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:27:21,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-04-15 03:27:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-04-15 03:27:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-04-15 03:27:21,964 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-04-15 03:27:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:21,964 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-04-15 03:27:21,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-04-15 03:27:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:27:21,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:21,966 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:21,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 03:27:21,966 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-04-15 03:27:21,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:21,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148371933] [2021-04-15 03:27:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:22,044 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 03:27:22,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148371933] [2021-04-15 03:27:22,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081949674] [2021-04-15 03:27:22,046 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 03:27:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:27:22,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:22,238 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 03:27:22,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:22,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-04-15 03:27:22,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999930051] [2021-04-15 03:27:22,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:27:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:27:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:27:22,242 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:22,301 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-04-15 03:27:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:27:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:27:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:22,307 INFO L225 Difference]: With dead ends: 90 [2021-04-15 03:27:22,307 INFO L226 Difference]: Without dead ends: 76 [2021-04-15 03:27:22,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-04-15 03:27:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-04-15 03:27:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-04-15 03:27:22,322 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-04-15 03:27:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:22,323 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-04-15 03:27:22,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-04-15 03:27:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:27:22,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:22,324 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:22,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 03:27:22,529 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:22,530 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-04-15 03:27:22,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:22,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084361668] [2021-04-15 03:27:22,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:22,577 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 03:27:22,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084361668] [2021-04-15 03:27:22,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:27:22,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:27:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962932670] [2021-04-15 03:27:22,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:27:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:27:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:27:22,581 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:22,630 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-04-15 03:27:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:27:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:27:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:22,632 INFO L225 Difference]: With dead ends: 98 [2021-04-15 03:27:22,632 INFO L226 Difference]: Without dead ends: 84 [2021-04-15 03:27:22,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:27:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-04-15 03:27:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-04-15 03:27:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-04-15 03:27:22,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-04-15 03:27:22,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:22,637 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-04-15 03:27:22,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,638 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-04-15 03:27:22,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:27:22,638 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:22,638 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:22,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:27:22,639 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:22,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:22,639 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-04-15 03:27:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:22,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033849157] [2021-04-15 03:27:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:22,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033849157] [2021-04-15 03:27:22,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172829772] [2021-04-15 03:27:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:22,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:27:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:22,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:22,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 03:27:22,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242734167] [2021-04-15 03:27:22,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:22,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:22,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:22,907 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:22,987 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-04-15 03:27:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:27:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:27:22,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:22,989 INFO L225 Difference]: With dead ends: 108 [2021-04-15 03:27:22,989 INFO L226 Difference]: Without dead ends: 94 [2021-04-15 03:27:22,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:27:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-04-15 03:27:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-04-15 03:27:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-04-15 03:27:22,999 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-04-15 03:27:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:23,000 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-04-15 03:27:23,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-04-15 03:27:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:27:23,005 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:23,005 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:23,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:23,221 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-04-15 03:27:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:23,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714106211] [2021-04-15 03:27:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:23,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714106211] [2021-04-15 03:27:23,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556395312] [2021-04-15 03:27:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:27:23,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:27:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:23,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:23,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 03:27:23,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558047535] [2021-04-15 03:27:23,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:23,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:23,407 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:23,526 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-04-15 03:27:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:27:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:27:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:23,527 INFO L225 Difference]: With dead ends: 156 [2021-04-15 03:27:23,527 INFO L226 Difference]: Without dead ends: 126 [2021-04-15 03:27:23,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:27:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-04-15 03:27:23,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-04-15 03:27:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-04-15 03:27:23,534 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-04-15 03:27:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:23,534 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-04-15 03:27:23,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-04-15 03:27:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:27:23,535 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:23,535 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:23,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:23,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:23,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:23,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-04-15 03:27:23,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:23,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69378133] [2021-04-15 03:27:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69378133] [2021-04-15 03:27:23,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190128472] [2021-04-15 03:27:23,831 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 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 03:27:23,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:27:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:23,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:27:23,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-04-15 03:27:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720825670] [2021-04-15 03:27:23,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:23,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:23,999 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 03:27:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:24,089 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-04-15 03:27:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:27:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:27:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:24,091 INFO L225 Difference]: With dead ends: 142 [2021-04-15 03:27:24,091 INFO L226 Difference]: Without dead ends: 128 [2021-04-15 03:27:24,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-04-15 03:27:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-04-15 03:27:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-04-15 03:27:24,105 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-04-15 03:27:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:24,105 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-04-15 03:27:24,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 03:27:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-04-15 03:27:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:27:24,105 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:24,106 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:24,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:24,321 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-04-15 03:27:24,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:24,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781070915] [2021-04-15 03:27:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:24,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781070915] [2021-04-15 03:27:24,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709435964] [2021-04-15 03:27:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:24,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:27:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:24,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:24,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-04-15 03:27:24,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386987100] [2021-04-15 03:27:24,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:24,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:24,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:24,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:24,522 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 03:27:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:24,643 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-04-15 03:27:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:27:24,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:27:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:24,645 INFO L225 Difference]: With dead ends: 150 [2021-04-15 03:27:24,645 INFO L226 Difference]: Without dead ends: 136 [2021-04-15 03:27:24,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:27:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-04-15 03:27:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-04-15 03:27:24,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-04-15 03:27:24,654 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-04-15 03:27:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:24,654 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-04-15 03:27:24,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 03:27:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-04-15 03:27:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:27:24,655 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:24,655 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:24,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 03:27:24,856 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-04-15 03:27:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:24,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977437419] [2021-04-15 03:27:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:24,913 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 03:27:24,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977437419] [2021-04-15 03:27:24,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704773497] [2021-04-15 03:27:24,916 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 03:27:24,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:24,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:24,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:27:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:25,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:25,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-04-15 03:27:25,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012264476] [2021-04-15 03:27:25,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:25,071 INFO L87 Difference]: Start difference. First operand 128 states and 293 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 03:27:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:25,160 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-04-15 03:27:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:27:25,160 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 20 [2021-04-15 03:27:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:25,161 INFO L225 Difference]: With dead ends: 150 [2021-04-15 03:27:25,161 INFO L226 Difference]: Without dead ends: 136 [2021-04-15 03:27:25,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-04-15 03:27:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-04-15 03:27:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-04-15 03:27:25,165 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-04-15 03:27:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:25,166 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-04-15 03:27:25,166 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 03:27:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-04-15 03:27:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:27:25,167 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:25,167 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:25,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:27:25,382 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:25,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:25,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-04-15 03:27:25,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:25,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839327426] [2021-04-15 03:27:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839327426] [2021-04-15 03:27:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856389048] [2021-04-15 03:27:25,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:25,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:25,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:27:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:25,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:25,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:27:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926952503] [2021-04-15 03:27:25,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:27:25,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:27:25,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:25,666 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:25,865 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-04-15 03:27:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:27:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:27:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:25,867 INFO L225 Difference]: With dead ends: 212 [2021-04-15 03:27:25,867 INFO L226 Difference]: Without dead ends: 174 [2021-04-15 03:27:25,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-04-15 03:27:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-04-15 03:27:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-04-15 03:27:25,873 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-04-15 03:27:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:25,873 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-04-15 03:27:25,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-04-15 03:27:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:27:25,874 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:25,874 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:26,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:26,089 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:26,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-04-15 03:27:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:26,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679182374] [2021-04-15 03:27:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679182374] [2021-04-15 03:27:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122043902] [2021-04-15 03:27:26,142 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 03:27:26,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:27:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:27:26,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:26,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:26,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:27:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561873865] [2021-04-15 03:27:26,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:27:26,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:27:26,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:26,292 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:26,445 INFO L93 Difference]: Finished difference Result 180 states and 408 transitions. [2021-04-15 03:27:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:27:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:27:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:26,447 INFO L225 Difference]: With dead ends: 180 [2021-04-15 03:27:26,447 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 03:27:26,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:27:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 03:27:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2021-04-15 03:27:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.3248407643312103) internal successors, (365), 157 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2021-04-15 03:27:26,453 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 22 [2021-04-15 03:27:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:26,453 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 365 transitions. [2021-04-15 03:27:26,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 365 transitions. [2021-04-15 03:27:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:27:26,454 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:26,454 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:26,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:27:26,665 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash 149838780, now seen corresponding path program 4 times [2021-04-15 03:27:26,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:26,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559096218] [2021-04-15 03:27:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559096218] [2021-04-15 03:27:26,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148092095] [2021-04-15 03:27:26,727 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 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 03:27:26,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:26,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:27:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:26,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:26,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:27:26,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861059481] [2021-04-15 03:27:26,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:27:26,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:27:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:26,883 INFO L87 Difference]: Start difference. First operand 158 states and 365 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:27,013 INFO L93 Difference]: Finished difference Result 220 states and 504 transitions. [2021-04-15 03:27:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:27:27,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:27:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:27,015 INFO L225 Difference]: With dead ends: 220 [2021-04-15 03:27:27,015 INFO L226 Difference]: Without dead ends: 198 [2021-04-15 03:27:27,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:27:27,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-04-15 03:27:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 142. [2021-04-15 03:27:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-04-15 03:27:27,031 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-04-15 03:27:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:27,031 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-04-15 03:27:27,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-04-15 03:27:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:27:27,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:27,033 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:27,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:27,259 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2125206920, now seen corresponding path program 5 times [2021-04-15 03:27:27,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:27,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308017877] [2021-04-15 03:27:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308017877] [2021-04-15 03:27:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244572058] [2021-04-15 03:27:27,337 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 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 03:27:27,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:27:27,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:27:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:27,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:27,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:27:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695017665] [2021-04-15 03:27:27,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:27:27,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:27:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:27,467 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:27,636 INFO L93 Difference]: Finished difference Result 204 states and 468 transitions. [2021-04-15 03:27:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:27:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:27:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:27,638 INFO L225 Difference]: With dead ends: 204 [2021-04-15 03:27:27,638 INFO L226 Difference]: Without dead ends: 190 [2021-04-15 03:27:27,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-04-15 03:27:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 150. [2021-04-15 03:27:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.315436241610738) internal successors, (345), 149 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 345 transitions. [2021-04-15 03:27:27,645 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 345 transitions. Word has length 22 [2021-04-15 03:27:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:27,646 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 345 transitions. [2021-04-15 03:27:27,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 345 transitions. [2021-04-15 03:27:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:27:27,647 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:27,648 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:27,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:27:27,857 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:27,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1937516620, now seen corresponding path program 6 times [2021-04-15 03:27:27,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:27,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740435816] [2021-04-15 03:27:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:27,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740435816] [2021-04-15 03:27:27,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387574627] [2021-04-15 03:27:27,915 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:27,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:27:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:27:27,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:28,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:28,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-04-15 03:27:28,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295958599] [2021-04-15 03:27:28,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:27:28,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:28,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:27:28,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:28,052 INFO L87 Difference]: Start difference. First operand 150 states and 345 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:28,223 INFO L93 Difference]: Finished difference Result 320 states and 704 transitions. [2021-04-15 03:27:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:27:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:28,231 INFO L225 Difference]: With dead ends: 320 [2021-04-15 03:27:28,231 INFO L226 Difference]: Without dead ends: 286 [2021-04-15 03:27:28,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-04-15 03:27:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 174. [2021-04-15 03:27:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.3641618497109826) internal successors, (409), 173 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 409 transitions. [2021-04-15 03:27:28,243 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 409 transitions. Word has length 22 [2021-04-15 03:27:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:28,244 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 409 transitions. [2021-04-15 03:27:28,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 03:27:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 409 transitions. [2021-04-15 03:27:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:28,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:28,245 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:28,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 03:27:28,463 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 7 times [2021-04-15 03:27:28,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:28,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60947267] [2021-04-15 03:27:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:28,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60947267] [2021-04-15 03:27:28,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003702242] [2021-04-15 03:27:28,538 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 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 03:27:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:28,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:28,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:28,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295115704] [2021-04-15 03:27:28,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:28,758 INFO L87 Difference]: Start difference. First operand 174 states and 409 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 03:27:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:28,955 INFO L93 Difference]: Finished difference Result 252 states and 588 transitions. [2021-04-15 03:27:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:28,955 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 24 [2021-04-15 03:27:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:28,956 INFO L225 Difference]: With dead ends: 252 [2021-04-15 03:27:28,956 INFO L226 Difference]: Without dead ends: 230 [2021-04-15 03:27:28,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-04-15 03:27:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 190. [2021-04-15 03:27:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.375661375661376) internal successors, (449), 189 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 449 transitions. [2021-04-15 03:27:28,963 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 449 transitions. Word has length 24 [2021-04-15 03:27:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 449 transitions. [2021-04-15 03:27:28,963 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 03:27:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 449 transitions. [2021-04-15 03:27:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:28,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:28,964 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:29,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 03:27:29,169 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 8 times [2021-04-15 03:27:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92008031] [2021-04-15 03:27:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92008031] [2021-04-15 03:27:29,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6995663] [2021-04-15 03:27:29,275 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 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 03:27:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:29,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:29,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:29,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875844986] [2021-04-15 03:27:29,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:29,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:29,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:29,506 INFO L87 Difference]: Start difference. First operand 190 states and 449 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 03:27:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:29,714 INFO L93 Difference]: Finished difference Result 268 states and 628 transitions. [2021-04-15 03:27:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:29,714 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 24 [2021-04-15 03:27:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:29,716 INFO L225 Difference]: With dead ends: 268 [2021-04-15 03:27:29,716 INFO L226 Difference]: Without dead ends: 246 [2021-04-15 03:27:29,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:27:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-04-15 03:27:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 198. [2021-04-15 03:27:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3807106598984773) internal successors, (469), 197 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 469 transitions. [2021-04-15 03:27:29,722 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 469 transitions. Word has length 24 [2021-04-15 03:27:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:29,722 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 469 transitions. [2021-04-15 03:27:29,722 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 03:27:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 469 transitions. [2021-04-15 03:27:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:29,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:29,723 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:29,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 03:27:29,937 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 9 times [2021-04-15 03:27:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331599734] [2021-04-15 03:27:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:30,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331599734] [2021-04-15 03:27:30,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000816636] [2021-04-15 03:27:30,017 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 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 03:27:30,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:27:30,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:30,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:30,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962934789] [2021-04-15 03:27:30,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:30,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:30,188 INFO L87 Difference]: Start difference. First operand 198 states and 469 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 03:27:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:30,413 INFO L93 Difference]: Finished difference Result 324 states and 760 transitions. [2021-04-15 03:27:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:30,414 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 24 [2021-04-15 03:27:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:30,415 INFO L225 Difference]: With dead ends: 324 [2021-04-15 03:27:30,415 INFO L226 Difference]: Without dead ends: 286 [2021-04-15 03:27:30,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-04-15 03:27:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 238. [2021-04-15 03:27:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-04-15 03:27:30,422 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-04-15 03:27:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:30,423 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-04-15 03:27:30,423 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 03:27:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-04-15 03:27:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:30,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:30,423 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:30,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:30,624 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 10 times [2021-04-15 03:27:30,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:30,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672745260] [2021-04-15 03:27:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:30,691 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 03:27:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672745260] [2021-04-15 03:27:30,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984146485] [2021-04-15 03:27:30,691 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 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 03:27:30,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:30,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:30,863 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 03:27:30,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:30,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109325893] [2021-04-15 03:27:30,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:30,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:30,865 INFO L87 Difference]: Start difference. First operand 238 states and 569 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 03:27:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:31,107 INFO L93 Difference]: Finished difference Result 276 states and 652 transitions. [2021-04-15 03:27:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:31,108 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 24 [2021-04-15 03:27:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:31,109 INFO L225 Difference]: With dead ends: 276 [2021-04-15 03:27:31,109 INFO L226 Difference]: Without dead ends: 262 [2021-04-15 03:27:31,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-04-15 03:27:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 238. [2021-04-15 03:27:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-04-15 03:27:31,117 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-04-15 03:27:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:31,117 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-04-15 03:27:31,117 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 03:27:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-04-15 03:27:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:31,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:31,118 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:31,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 03:27:31,321 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 11 times [2021-04-15 03:27:31,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:31,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966375314] [2021-04-15 03:27:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:31,407 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 03:27:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966375314] [2021-04-15 03:27:31,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127859721] [2021-04-15 03:27:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:27:31,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:27:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:31,604 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 03:27:31,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:31,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017703175] [2021-04-15 03:27:31,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:31,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:31,607 INFO L87 Difference]: Start difference. First operand 238 states and 569 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 03:27:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:31,783 INFO L93 Difference]: Finished difference Result 284 states and 672 transitions. [2021-04-15 03:27:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:31,783 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 24 [2021-04-15 03:27:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:31,784 INFO L225 Difference]: With dead ends: 284 [2021-04-15 03:27:31,784 INFO L226 Difference]: Without dead ends: 270 [2021-04-15 03:27:31,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-04-15 03:27:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 238. [2021-04-15 03:27:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.4008438818565403) internal successors, (569), 237 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 569 transitions. [2021-04-15 03:27:31,792 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 569 transitions. Word has length 24 [2021-04-15 03:27:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:31,792 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 569 transitions. [2021-04-15 03:27:31,792 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 03:27:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 569 transitions. [2021-04-15 03:27:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:31,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:31,793 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:32,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:32,009 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1446592258, now seen corresponding path program 12 times [2021-04-15 03:27:32,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:32,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258063456] [2021-04-15 03:27:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:32,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258063456] [2021-04-15 03:27:32,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300927101] [2021-04-15 03:27:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:27:32,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:27:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:32,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:32,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:32,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347920153] [2021-04-15 03:27:32,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:32,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:32,277 INFO L87 Difference]: Start difference. First operand 238 states and 569 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 03:27:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:32,488 INFO L93 Difference]: Finished difference Result 340 states and 800 transitions. [2021-04-15 03:27:32,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:32,489 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 24 [2021-04-15 03:27:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:32,491 INFO L225 Difference]: With dead ends: 340 [2021-04-15 03:27:32,491 INFO L226 Difference]: Without dead ends: 302 [2021-04-15 03:27:32,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-04-15 03:27:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-04-15 03:27:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-04-15 03:27:32,498 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-04-15 03:27:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:32,499 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-04-15 03:27:32,499 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 03:27:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-04-15 03:27:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:32,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:32,499 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:32,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:32,713 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1258901958, now seen corresponding path program 13 times [2021-04-15 03:27:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:32,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249647123] [2021-04-15 03:27:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:32,781 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 03:27:32,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249647123] [2021-04-15 03:27:32,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254117981] [2021-04-15 03:27:32,781 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 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 03:27:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:32,975 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 03:27:32,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:32,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248538161] [2021-04-15 03:27:32,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:32,979 INFO L87 Difference]: Start difference. First operand 246 states and 589 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 03:27:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:33,153 INFO L93 Difference]: Finished difference Result 300 states and 712 transitions. [2021-04-15 03:27:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:27:33,154 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 24 [2021-04-15 03:27:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:33,155 INFO L225 Difference]: With dead ends: 300 [2021-04-15 03:27:33,155 INFO L226 Difference]: Without dead ends: 286 [2021-04-15 03:27:33,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:27:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-04-15 03:27:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 246. [2021-04-15 03:27:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-04-15 03:27:33,163 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-04-15 03:27:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:33,164 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-04-15 03:27:33,164 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 03:27:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-04-15 03:27:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:33,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:33,165 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:33,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:33,377 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1570988542, now seen corresponding path program 14 times [2021-04-15 03:27:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:33,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843916602] [2021-04-15 03:27:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:33,449 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 03:27:33,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843916602] [2021-04-15 03:27:33,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239693999] [2021-04-15 03:27:33,449 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 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 03:27:33,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:33,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:33,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:33,628 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 03:27:33,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:33,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:33,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292126664] [2021-04-15 03:27:33,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:33,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:33,630 INFO L87 Difference]: Start difference. First operand 246 states and 589 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 03:27:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:33,845 INFO L93 Difference]: Finished difference Result 332 states and 784 transitions. [2021-04-15 03:27:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:33,845 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 24 [2021-04-15 03:27:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:33,847 INFO L225 Difference]: With dead ends: 332 [2021-04-15 03:27:33,847 INFO L226 Difference]: Without dead ends: 302 [2021-04-15 03:27:33,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:27:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-04-15 03:27:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-04-15 03:27:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:33,856 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:33,857 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:33,857 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 03:27:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:33,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:33,858 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:34,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 03:27:34,077 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1464840390, now seen corresponding path program 15 times [2021-04-15 03:27:34,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:34,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873911137] [2021-04-15 03:27:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:34,154 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 03:27:34,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873911137] [2021-04-15 03:27:34,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418212369] [2021-04-15 03:27:34,154 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 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 03:27:34,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:27:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:34,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:34,337 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 03:27:34,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:34,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018713276] [2021-04-15 03:27:34,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:34,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:34,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:34,340 INFO L87 Difference]: Start difference. First operand 262 states and 625 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 03:27:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:34,615 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-04-15 03:27:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:34,616 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 24 [2021-04-15 03:27:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:34,617 INFO L225 Difference]: With dead ends: 332 [2021-04-15 03:27:34,617 INFO L226 Difference]: Without dead ends: 318 [2021-04-15 03:27:34,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:27:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-04-15 03:27:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 262. [2021-04-15 03:27:34,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:34,623 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:34,623 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:34,623 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 03:27:34,623 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:34,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:34,624 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:34,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 03:27:34,824 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 16 times [2021-04-15 03:27:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:34,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250901606] [2021-04-15 03:27:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:34,901 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 03:27:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250901606] [2021-04-15 03:27:34,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782300847] [2021-04-15 03:27:34,901 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 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 03:27:34,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:34,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:35,056 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 03:27:35,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:35,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683659311] [2021-04-15 03:27:35,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:35,057 INFO L87 Difference]: Start difference. First operand 262 states and 625 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 03:27:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:35,187 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-04-15 03:27:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:27:35,188 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 24 [2021-04-15 03:27:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:35,189 INFO L225 Difference]: With dead ends: 300 [2021-04-15 03:27:35,189 INFO L226 Difference]: Without dead ends: 286 [2021-04-15 03:27:35,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-04-15 03:27:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-04-15 03:27:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:35,198 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:35,198 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:35,199 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 03:27:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:35,199 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:35,200 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:35,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 03:27:35,413 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 17 times [2021-04-15 03:27:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:35,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479849080] [2021-04-15 03:27:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:35,479 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 03:27:35,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479849080] [2021-04-15 03:27:35,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118336590] [2021-04-15 03:27:35,479 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:35,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:27:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:35,687 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 03:27:35,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:35,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:35,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298484400] [2021-04-15 03:27:35,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:35,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:35,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:35,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:35,688 INFO L87 Difference]: Start difference. First operand 262 states and 625 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 03:27:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:35,893 INFO L93 Difference]: Finished difference Result 316 states and 748 transitions. [2021-04-15 03:27:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:27:35,894 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 24 [2021-04-15 03:27:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:35,895 INFO L225 Difference]: With dead ends: 316 [2021-04-15 03:27:35,895 INFO L226 Difference]: Without dead ends: 302 [2021-04-15 03:27:35,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:27:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-04-15 03:27:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-04-15 03:27:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:35,902 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:35,902 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:35,902 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 03:27:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:35,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:35,903 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:36,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:36,104 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 18 times [2021-04-15 03:27:36,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:36,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089805135] [2021-04-15 03:27:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:36,161 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 03:27:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089805135] [2021-04-15 03:27:36,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510088734] [2021-04-15 03:27:36,161 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:36,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:27:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:36,330 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 03:27:36,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:36,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:36,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227107654] [2021-04-15 03:27:36,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:36,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:36,332 INFO L87 Difference]: Start difference. First operand 262 states and 625 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 03:27:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:36,657 INFO L93 Difference]: Finished difference Result 380 states and 900 transitions. [2021-04-15 03:27:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:36,658 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 24 [2021-04-15 03:27:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:36,659 INFO L225 Difference]: With dead ends: 380 [2021-04-15 03:27:36,659 INFO L226 Difference]: Without dead ends: 350 [2021-04-15 03:27:36,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:27:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-04-15 03:27:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-04-15 03:27:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-04-15 03:27:36,674 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-04-15 03:27:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:36,675 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-04-15 03:27:36,675 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 03:27:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-04-15 03:27:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:36,676 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:36,676 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:36,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:36,899 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash -189697990, now seen corresponding path program 19 times [2021-04-15 03:27:36,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:36,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113938561] [2021-04-15 03:27:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:36,966 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 03:27:36,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113938561] [2021-04-15 03:27:36,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64791504] [2021-04-15 03:27:36,966 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 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 03:27:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:36,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:36,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:37,133 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 03:27:37,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:37,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:37,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521746528] [2021-04-15 03:27:37,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:37,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:37,135 INFO L87 Difference]: Start difference. First operand 270 states and 645 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 03:27:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:37,345 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-04-15 03:27:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:37,346 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 24 [2021-04-15 03:27:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:37,347 INFO L225 Difference]: With dead ends: 332 [2021-04-15 03:27:37,347 INFO L226 Difference]: Without dead ends: 318 [2021-04-15 03:27:37,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:27:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-04-15 03:27:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-04-15 03:27:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-04-15 03:27:37,354 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-04-15 03:27:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:37,354 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-04-15 03:27:37,354 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 03:27:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-04-15 03:27:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:37,355 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:37,355 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:37,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:37,579 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 20 times [2021-04-15 03:27:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:37,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762964789] [2021-04-15 03:27:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:37,639 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 03:27:37,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762964789] [2021-04-15 03:27:37,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66802187] [2021-04-15 03:27:37,639 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:37,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:37,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:37,787 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 03:27:37,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:37,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:37,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279351538] [2021-04-15 03:27:37,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:37,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:37,789 INFO L87 Difference]: Start difference. First operand 270 states and 645 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 03:27:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:37,999 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-04-15 03:27:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:37,999 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 24 [2021-04-15 03:27:38,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:38,001 INFO L225 Difference]: With dead ends: 308 [2021-04-15 03:27:38,001 INFO L226 Difference]: Without dead ends: 294 [2021-04-15 03:27:38,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-04-15 03:27:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-04-15 03:27:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:38,008 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:38,008 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:38,008 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 03:27:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:38,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:38,009 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:38,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 03:27:38,229 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash -528035526, now seen corresponding path program 21 times [2021-04-15 03:27:38,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:38,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647938721] [2021-04-15 03:27:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:38,292 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 03:27:38,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647938721] [2021-04-15 03:27:38,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802391228] [2021-04-15 03:27:38,292 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 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 03:27:38,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:27:38,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:38,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:38,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:38,498 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 03:27:38,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:38,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:38,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939510020] [2021-04-15 03:27:38,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:38,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:38,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:38,500 INFO L87 Difference]: Start difference. First operand 262 states and 625 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 03:27:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:38,799 INFO L93 Difference]: Finished difference Result 340 states and 808 transitions. [2021-04-15 03:27:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:38,799 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 24 [2021-04-15 03:27:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:38,800 INFO L225 Difference]: With dead ends: 340 [2021-04-15 03:27:38,800 INFO L226 Difference]: Without dead ends: 326 [2021-04-15 03:27:38,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:27:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-04-15 03:27:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 270. [2021-04-15 03:27:38,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-04-15 03:27:38,807 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-04-15 03:27:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:38,807 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-04-15 03:27:38,807 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 03:27:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-04-15 03:27:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:38,808 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:38,828 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:39,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:39,045 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:39,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 22 times [2021-04-15 03:27:39,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:39,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516123743] [2021-04-15 03:27:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:39,138 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 03:27:39,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516123743] [2021-04-15 03:27:39,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915058064] [2021-04-15 03:27:39,139 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 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 03:27:39,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:27:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:39,366 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 03:27:39,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:39,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216603994] [2021-04-15 03:27:39,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:39,368 INFO L87 Difference]: Start difference. First operand 270 states and 645 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 03:27:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:39,663 INFO L93 Difference]: Finished difference Result 332 states and 784 transitions. [2021-04-15 03:27:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:39,664 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 24 [2021-04-15 03:27:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:39,665 INFO L225 Difference]: With dead ends: 332 [2021-04-15 03:27:39,665 INFO L226 Difference]: Without dead ends: 310 [2021-04-15 03:27:39,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-04-15 03:27:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 270. [2021-04-15 03:27:39,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-04-15 03:27:39,671 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-04-15 03:27:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:39,671 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-04-15 03:27:39,672 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 03:27:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-04-15 03:27:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:27:39,689 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:39,690 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:39,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:39,909 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 23 times [2021-04-15 03:27:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:39,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798397830] [2021-04-15 03:27:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:39,999 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 03:27:39,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798397830] [2021-04-15 03:27:39,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117295365] [2021-04-15 03:27:39,999 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 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 03:27:40,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:27:40,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:40,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:40,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:40,296 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 03:27:40,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:40,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:27:40,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98229324] [2021-04-15 03:27:40,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:27:40,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:27:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:40,298 INFO L87 Difference]: Start difference. First operand 270 states and 645 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 03:27:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:40,489 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-04-15 03:27:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:27:40,489 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 24 [2021-04-15 03:27:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:40,490 INFO L225 Difference]: With dead ends: 308 [2021-04-15 03:27:40,490 INFO L226 Difference]: Without dead ends: 294 [2021-04-15 03:27:40,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-04-15 03:27:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-04-15 03:27:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-04-15 03:27:40,496 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-04-15 03:27:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:40,496 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-04-15 03:27:40,496 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 03:27:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-04-15 03:27:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:40,497 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:40,497 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:40,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:40,721 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 24 times [2021-04-15 03:27:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:40,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830964796] [2021-04-15 03:27:40,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:40,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830964796] [2021-04-15 03:27:40,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708181017] [2021-04-15 03:27:40,799 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 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 03:27:40,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:27:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:41,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:41,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:41,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389784953] [2021-04-15 03:27:41,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:41,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:41,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:41,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:41,070 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:41,374 INFO L93 Difference]: Finished difference Result 396 states and 940 transitions. [2021-04-15 03:27:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:41,377 INFO L225 Difference]: With dead ends: 396 [2021-04-15 03:27:41,378 INFO L226 Difference]: Without dead ends: 366 [2021-04-15 03:27:41,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-04-15 03:27:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-04-15 03:27:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4061433447098977) internal successors, (705), 293 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 705 transitions. [2021-04-15 03:27:41,388 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 705 transitions. Word has length 26 [2021-04-15 03:27:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:41,388 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 705 transitions. [2021-04-15 03:27:41,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 705 transitions. [2021-04-15 03:27:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:41,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:41,389 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:41,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 03:27:41,614 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:41,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 25 times [2021-04-15 03:27:41,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:41,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331499569] [2021-04-15 03:27:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331499569] [2021-04-15 03:27:41,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515052202] [2021-04-15 03:27:41,689 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441988734] [2021-04-15 03:27:41,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:41,920 INFO L87 Difference]: Start difference. First operand 294 states and 705 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:42,234 INFO L93 Difference]: Finished difference Result 460 states and 1096 transitions. [2021-04-15 03:27:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:42,236 INFO L225 Difference]: With dead ends: 460 [2021-04-15 03:27:42,236 INFO L226 Difference]: Without dead ends: 422 [2021-04-15 03:27:42,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:27:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-04-15 03:27:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 310. [2021-04-15 03:27:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-04-15 03:27:42,243 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-04-15 03:27:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:42,244 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-04-15 03:27:42,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-04-15 03:27:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:42,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:42,245 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:42,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:42,468 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 26 times [2021-04-15 03:27:42,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:42,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871976001] [2021-04-15 03:27:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:42,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871976001] [2021-04-15 03:27:42,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336931871] [2021-04-15 03:27:42,549 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:42,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:42,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:42,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978582762] [2021-04-15 03:27:42,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:42,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:42,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:42,800 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:43,161 INFO L93 Difference]: Finished difference Result 468 states and 1120 transitions. [2021-04-15 03:27:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:27:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:43,163 INFO L225 Difference]: With dead ends: 468 [2021-04-15 03:27:43,163 INFO L226 Difference]: Without dead ends: 438 [2021-04-15 03:27:43,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:27:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-04-15 03:27:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 350. [2021-04-15 03:27:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.4212034383954153) internal successors, (845), 349 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 845 transitions. [2021-04-15 03:27:43,170 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 845 transitions. Word has length 26 [2021-04-15 03:27:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:43,170 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 845 transitions. [2021-04-15 03:27:43,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 845 transitions. [2021-04-15 03:27:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:43,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:43,172 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:43,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:43,385 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1026684036, now seen corresponding path program 27 times [2021-04-15 03:27:43,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:43,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678702047] [2021-04-15 03:27:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:43,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678702047] [2021-04-15 03:27:43,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038694430] [2021-04-15 03:27:43,445 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 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 03:27:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:27:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:43,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:43,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:43,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982366214] [2021-04-15 03:27:43,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:43,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:43,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:43,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:43,648 INFO L87 Difference]: Start difference. First operand 350 states and 845 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:43,902 INFO L93 Difference]: Finished difference Result 452 states and 1084 transitions. [2021-04-15 03:27:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:43,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:43,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:43,903 INFO L225 Difference]: With dead ends: 452 [2021-04-15 03:27:43,903 INFO L226 Difference]: Without dead ends: 430 [2021-04-15 03:27:43,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-04-15 03:27:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-04-15 03:27:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.4212034383954153) internal successors, (845), 349 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 845 transitions. [2021-04-15 03:27:43,911 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 845 transitions. Word has length 26 [2021-04-15 03:27:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:43,911 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 845 transitions. [2021-04-15 03:27:43,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 845 transitions. [2021-04-15 03:27:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:43,912 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:43,912 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:44,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-04-15 03:27:44,126 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 28 times [2021-04-15 03:27:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:44,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342165891] [2021-04-15 03:27:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342165891] [2021-04-15 03:27:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58178149] [2021-04-15 03:27:44,194 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 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 03:27:44,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:44,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:44,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:44,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:44,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284373482] [2021-04-15 03:27:44,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:44,425 INFO L87 Difference]: Start difference. First operand 350 states and 845 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:44,672 INFO L93 Difference]: Finished difference Result 500 states and 1196 transitions. [2021-04-15 03:27:44,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:44,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:44,674 INFO L225 Difference]: With dead ends: 500 [2021-04-15 03:27:44,674 INFO L226 Difference]: Without dead ends: 462 [2021-04-15 03:27:44,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-04-15 03:27:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 366. [2021-04-15 03:27:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.4246575342465753) internal successors, (885), 365 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 885 transitions. [2021-04-15 03:27:44,682 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 885 transitions. Word has length 26 [2021-04-15 03:27:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:44,682 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 885 transitions. [2021-04-15 03:27:44,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 885 transitions. [2021-04-15 03:27:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:44,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:44,683 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:44,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:44,901 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:44,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 29 times [2021-04-15 03:27:44,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:44,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571609874] [2021-04-15 03:27:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:45,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571609874] [2021-04-15 03:27:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578788357] [2021-04-15 03:27:45,027 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:45,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:27:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:45,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:45,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537762929] [2021-04-15 03:27:45,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:45,236 INFO L87 Difference]: Start difference. First operand 366 states and 885 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:45,662 INFO L93 Difference]: Finished difference Result 556 states and 1336 transitions. [2021-04-15 03:27:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:27:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:45,664 INFO L225 Difference]: With dead ends: 556 [2021-04-15 03:27:45,664 INFO L226 Difference]: Without dead ends: 518 [2021-04-15 03:27:45,665 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:27:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-04-15 03:27:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 406. [2021-04-15 03:27:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-04-15 03:27:45,673 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-04-15 03:27:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:45,673 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-04-15 03:27:45,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-04-15 03:27:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:45,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:45,674 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:45,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-04-15 03:27:45,875 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 30 times [2021-04-15 03:27:45,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:45,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37255713] [2021-04-15 03:27:45,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:45,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37255713] [2021-04-15 03:27:45,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474365584] [2021-04-15 03:27:45,979 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 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 03:27:45,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:27:45,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:45,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:46,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:46,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:46,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:46,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235761687] [2021-04-15 03:27:46,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:46,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:46,213 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:46,444 INFO L93 Difference]: Finished difference Result 444 states and 1068 transitions. [2021-04-15 03:27:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:27:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:46,446 INFO L225 Difference]: With dead ends: 444 [2021-04-15 03:27:46,446 INFO L226 Difference]: Without dead ends: 430 [2021-04-15 03:27:46,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:27:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-04-15 03:27:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 406. [2021-04-15 03:27:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-04-15 03:27:46,453 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-04-15 03:27:46,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:46,453 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-04-15 03:27:46,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,453 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-04-15 03:27:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:46,454 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:46,454 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:46,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:46,655 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:46,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1446620796, now seen corresponding path program 31 times [2021-04-15 03:27:46,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:46,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594763813] [2021-04-15 03:27:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594763813] [2021-04-15 03:27:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485519156] [2021-04-15 03:27:46,718 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 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 03:27:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:46,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:46,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:46,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:46,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665176191] [2021-04-15 03:27:46,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:46,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:46,948 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:47,208 INFO L93 Difference]: Finished difference Result 516 states and 1240 transitions. [2021-04-15 03:27:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:47,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:47,210 INFO L225 Difference]: With dead ends: 516 [2021-04-15 03:27:47,210 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 03:27:47,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 03:27:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 414. [2021-04-15 03:27:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.433414043583535) internal successors, (1005), 413 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1005 transitions. [2021-04-15 03:27:47,219 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1005 transitions. Word has length 26 [2021-04-15 03:27:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:47,219 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1005 transitions. [2021-04-15 03:27:47,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1005 transitions. [2021-04-15 03:27:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:47,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:47,221 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:47,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:47,443 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2050252736, now seen corresponding path program 32 times [2021-04-15 03:27:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:47,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769414658] [2021-04-15 03:27:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:47,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769414658] [2021-04-15 03:27:47,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657443893] [2021-04-15 03:27:47,511 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 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 03:27:47,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:47,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:47,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:47,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:47,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:47,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:47,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820703157] [2021-04-15 03:27:47,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:47,708 INFO L87 Difference]: Start difference. First operand 414 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:47,964 INFO L93 Difference]: Finished difference Result 508 states and 1220 transitions. [2021-04-15 03:27:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:47,965 INFO L225 Difference]: With dead ends: 508 [2021-04-15 03:27:47,965 INFO L226 Difference]: Without dead ends: 478 [2021-04-15 03:27:47,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-04-15 03:27:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-04-15 03:27:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-04-15 03:27:47,972 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-04-15 03:27:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:47,972 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-04-15 03:27:47,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-04-15 03:27:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:47,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:47,974 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:48,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-04-15 03:27:48,189 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 33 times [2021-04-15 03:27:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:48,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786562875] [2021-04-15 03:27:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786562875] [2021-04-15 03:27:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700741494] [2021-04-15 03:27:48,257 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 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 03:27:48,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:27:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:48,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:48,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:48,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229924302] [2021-04-15 03:27:48,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:48,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:48,477 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:48,771 INFO L93 Difference]: Finished difference Result 548 states and 1316 transitions. [2021-04-15 03:27:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:48,773 INFO L225 Difference]: With dead ends: 548 [2021-04-15 03:27:48,773 INFO L226 Difference]: Without dead ends: 510 [2021-04-15 03:27:48,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 343.5ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-04-15 03:27:48,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 390. [2021-04-15 03:27:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.429305912596401) internal successors, (945), 389 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 945 transitions. [2021-04-15 03:27:48,781 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 945 transitions. Word has length 26 [2021-04-15 03:27:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:48,781 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 945 transitions. [2021-04-15 03:27:48,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 945 transitions. [2021-04-15 03:27:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:48,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:48,782 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:48,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:48,982 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 34 times [2021-04-15 03:27:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:48,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723517346] [2021-04-15 03:27:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:49,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723517346] [2021-04-15 03:27:49,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757585937] [2021-04-15 03:27:49,094 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:49,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:49,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:49,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452423579] [2021-04-15 03:27:49,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:49,300 INFO L87 Difference]: Start difference. First operand 390 states and 945 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:49,659 INFO L93 Difference]: Finished difference Result 580 states and 1396 transitions. [2021-04-15 03:27:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:49,661 INFO L225 Difference]: With dead ends: 580 [2021-04-15 03:27:49,661 INFO L226 Difference]: Without dead ends: 542 [2021-04-15 03:27:49,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:27:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-04-15 03:27:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 406. [2021-04-15 03:27:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.432098765432099) internal successors, (985), 405 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 985 transitions. [2021-04-15 03:27:49,668 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 985 transitions. Word has length 26 [2021-04-15 03:27:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:49,668 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 985 transitions. [2021-04-15 03:27:49,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 985 transitions. [2021-04-15 03:27:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:49,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:49,669 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:49,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:49,891 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 35 times [2021-04-15 03:27:49,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:49,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387455838] [2021-04-15 03:27:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:49,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387455838] [2021-04-15 03:27:49,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270622294] [2021-04-15 03:27:49,952 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:49,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:27:49,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:49,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:50,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:50,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:50,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140315861] [2021-04-15 03:27:50,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:50,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:50,190 INFO L87 Difference]: Start difference. First operand 406 states and 985 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:50,521 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-04-15 03:27:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:50,524 INFO L225 Difference]: With dead ends: 588 [2021-04-15 03:27:50,524 INFO L226 Difference]: Without dead ends: 558 [2021-04-15 03:27:50,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:27:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-04-15 03:27:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 398. [2021-04-15 03:27:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4307304785894206) internal successors, (965), 397 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 965 transitions. [2021-04-15 03:27:50,533 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 965 transitions. Word has length 26 [2021-04-15 03:27:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:50,535 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 965 transitions. [2021-04-15 03:27:50,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 965 transitions. [2021-04-15 03:27:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:50,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:50,536 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:50,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:50,758 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1032101304, now seen corresponding path program 36 times [2021-04-15 03:27:50,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:50,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329548006] [2021-04-15 03:27:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329548006] [2021-04-15 03:27:50,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545318757] [2021-04-15 03:27:50,837 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 03:27:50,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:27:50,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:51,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:51,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:51,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275554765] [2021-04-15 03:27:51,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:51,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:51,059 INFO L87 Difference]: Start difference. First operand 398 states and 965 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:51,273 INFO L93 Difference]: Finished difference Result 452 states and 1088 transitions. [2021-04-15 03:27:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:27:51,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:51,276 INFO L225 Difference]: With dead ends: 452 [2021-04-15 03:27:51,276 INFO L226 Difference]: Without dead ends: 438 [2021-04-15 03:27:51,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:27:51,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-04-15 03:27:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2021-04-15 03:27:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.433414043583535) internal successors, (1005), 413 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1005 transitions. [2021-04-15 03:27:51,283 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1005 transitions. Word has length 26 [2021-04-15 03:27:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:51,283 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1005 transitions. [2021-04-15 03:27:51,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1005 transitions. [2021-04-15 03:27:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:51,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:51,284 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:51,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-04-15 03:27:51,497 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1344405960, now seen corresponding path program 37 times [2021-04-15 03:27:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:51,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356887305] [2021-04-15 03:27:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356887305] [2021-04-15 03:27:51,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442739461] [2021-04-15 03:27:51,553 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 03:27:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:51,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:51,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032228046] [2021-04-15 03:27:51,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:51,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:51,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:51,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:51,779 INFO L87 Difference]: Start difference. First operand 414 states and 1005 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:52,003 INFO L93 Difference]: Finished difference Result 532 states and 1280 transitions. [2021-04-15 03:27:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:52,005 INFO L225 Difference]: With dead ends: 532 [2021-04-15 03:27:52,005 INFO L226 Difference]: Without dead ends: 502 [2021-04-15 03:27:52,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:27:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-04-15 03:27:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 422. [2021-04-15 03:27:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4346793349168645) internal successors, (1025), 421 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1025 transitions. [2021-04-15 03:27:52,012 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1025 transitions. Word has length 26 [2021-04-15 03:27:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:52,013 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 1025 transitions. [2021-04-15 03:27:52,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1025 transitions. [2021-04-15 03:27:52,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:27:52,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:52,014 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:52,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:52,229 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 675515636, now seen corresponding path program 38 times [2021-04-15 03:27:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:52,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746518074] [2021-04-15 03:27:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746518074] [2021-04-15 03:27:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745898764] [2021-04-15 03:27:52,322 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) [2021-04-15 03:27:52,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:52,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:52,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-04-15 03:27:52,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642817588] [2021-04-15 03:27:52,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:27:52,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:27:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:52,517 INFO L87 Difference]: Start difference. First operand 422 states and 1025 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:52,863 INFO L93 Difference]: Finished difference Result 580 states and 1396 transitions. [2021-04-15 03:27:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:52,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:27:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:52,865 INFO L225 Difference]: With dead ends: 580 [2021-04-15 03:27:52,865 INFO L226 Difference]: Without dead ends: 542 [2021-04-15 03:27:52,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:27:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-04-15 03:27:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 430. [2021-04-15 03:27:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.4358974358974357) internal successors, (1045), 429 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1045 transitions. [2021-04-15 03:27:52,872 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1045 transitions. Word has length 26 [2021-04-15 03:27:52,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:52,875 INFO L480 AbstractCegarLoop]: Abstraction has 430 states and 1045 transitions. [2021-04-15 03:27:52,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1045 transitions. [2021-04-15 03:27:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:52,876 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:52,877 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:53,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:53,077 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-04-15 03:27:53,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:53,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448728182] [2021-04-15 03:27:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448728182] [2021-04-15 03:27:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766310814] [2021-04-15 03:27:53,179 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:53,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:27:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:53,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:53,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:53,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552249882] [2021-04-15 03:27:53,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:53,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:53,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:53,491 INFO L87 Difference]: Start difference. First operand 430 states and 1045 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:53,848 INFO L93 Difference]: Finished difference Result 498 states and 1192 transitions. [2021-04-15 03:27:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:53,850 INFO L225 Difference]: With dead ends: 498 [2021-04-15 03:27:53,850 INFO L226 Difference]: Without dead ends: 468 [2021-04-15 03:27:53,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:27:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-04-15 03:27:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 444. [2021-04-15 03:27:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.4311512415349887) internal successors, (1077), 443 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1077 transitions. [2021-04-15 03:27:53,858 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1077 transitions. Word has length 28 [2021-04-15 03:27:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:53,858 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1077 transitions. [2021-04-15 03:27:53,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1077 transitions. [2021-04-15 03:27:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:53,859 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:53,859 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:54,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-04-15 03:27:54,081 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:54,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:54,081 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 39 times [2021-04-15 03:27:54,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:54,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622748519] [2021-04-15 03:27:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622748519] [2021-04-15 03:27:54,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328248435] [2021-04-15 03:27:54,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:27:54,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:27:54,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:54,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:54,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:54,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:54,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714987148] [2021-04-15 03:27:54,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:54,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:54,449 INFO L87 Difference]: Start difference. First operand 444 states and 1077 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:54,866 INFO L93 Difference]: Finished difference Result 578 states and 1396 transitions. [2021-04-15 03:27:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:27:54,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:54,868 INFO L225 Difference]: With dead ends: 578 [2021-04-15 03:27:54,869 INFO L226 Difference]: Without dead ends: 556 [2021-04-15 03:27:54,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:27:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-04-15 03:27:54,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 444. [2021-04-15 03:27:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.4311512415349887) internal successors, (1077), 443 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1077 transitions. [2021-04-15 03:27:54,877 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1077 transitions. Word has length 28 [2021-04-15 03:27:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:54,878 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1077 transitions. [2021-04-15 03:27:54,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1077 transitions. [2021-04-15 03:27:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:54,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:54,879 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:55,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-04-15 03:27:55,097 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 40 times [2021-04-15 03:27:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:55,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584257641] [2021-04-15 03:27:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584257641] [2021-04-15 03:27:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360091720] [2021-04-15 03:27:55,224 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:55,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:55,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:55,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:55,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:55,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:55,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947396873] [2021-04-15 03:27:55,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:55,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:55,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:55,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:55,525 INFO L87 Difference]: Start difference. First operand 444 states and 1077 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:55,839 INFO L93 Difference]: Finished difference Result 602 states and 1448 transitions. [2021-04-15 03:27:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:55,841 INFO L225 Difference]: With dead ends: 602 [2021-04-15 03:27:55,841 INFO L226 Difference]: Without dead ends: 564 [2021-04-15 03:27:55,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:27:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-04-15 03:27:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 452. [2021-04-15 03:27:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.432372505543237) internal successors, (1097), 451 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1097 transitions. [2021-04-15 03:27:55,847 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1097 transitions. Word has length 28 [2021-04-15 03:27:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:55,847 INFO L480 AbstractCegarLoop]: Abstraction has 452 states and 1097 transitions. [2021-04-15 03:27:55,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1097 transitions. [2021-04-15 03:27:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:55,848 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:55,848 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:56,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-04-15 03:27:56,069 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:56,069 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 41 times [2021-04-15 03:27:56,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:56,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176529876] [2021-04-15 03:27:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:56,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176529876] [2021-04-15 03:27:56,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588175080] [2021-04-15 03:27:56,165 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 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 03:27:56,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:27:56,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:56,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:56,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892163534] [2021-04-15 03:27:56,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:56,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:56,454 INFO L87 Difference]: Start difference. First operand 452 states and 1097 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:56,816 INFO L93 Difference]: Finished difference Result 642 states and 1552 transitions. [2021-04-15 03:27:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:56,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:56,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:56,818 INFO L225 Difference]: With dead ends: 642 [2021-04-15 03:27:56,818 INFO L226 Difference]: Without dead ends: 612 [2021-04-15 03:27:56,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:27:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-04-15 03:27:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 492. [2021-04-15 03:27:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.4378818737270875) internal successors, (1197), 491 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1197 transitions. [2021-04-15 03:27:56,824 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1197 transitions. Word has length 28 [2021-04-15 03:27:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:56,824 INFO L480 AbstractCegarLoop]: Abstraction has 492 states and 1197 transitions. [2021-04-15 03:27:56,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1197 transitions. [2021-04-15 03:27:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:56,825 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:56,825 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:57,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:57,032 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash -994979326, now seen corresponding path program 42 times [2021-04-15 03:27:57,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:57,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034078] [2021-04-15 03:27:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:57,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034078] [2021-04-15 03:27:57,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163013982] [2021-04-15 03:27:57,111 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:57,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:27:57,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:57,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:57,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:57,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:57,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:57,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448509787] [2021-04-15 03:27:57,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:57,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:57,372 INFO L87 Difference]: Start difference. First operand 492 states and 1197 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:57,693 INFO L93 Difference]: Finished difference Result 666 states and 1612 transitions. [2021-04-15 03:27:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:27:57,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:57,696 INFO L225 Difference]: With dead ends: 666 [2021-04-15 03:27:57,696 INFO L226 Difference]: Without dead ends: 636 [2021-04-15 03:27:57,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:27:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-04-15 03:27:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 516. [2021-04-15 03:27:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.440776699029126) internal successors, (1257), 515 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1257 transitions. [2021-04-15 03:27:57,704 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1257 transitions. Word has length 28 [2021-04-15 03:27:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:57,704 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1257 transitions. [2021-04-15 03:27:57,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1257 transitions. [2021-04-15 03:27:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:57,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:57,705 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:57,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:57,921 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:57,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:57,921 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 43 times [2021-04-15 03:27:57,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:57,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391795502] [2021-04-15 03:27:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:58,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391795502] [2021-04-15 03:27:58,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155480377] [2021-04-15 03:27:58,024 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:58,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:58,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:58,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:58,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477995191] [2021-04-15 03:27:58,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:58,289 INFO L87 Difference]: Start difference. First operand 516 states and 1257 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:58,705 INFO L93 Difference]: Finished difference Result 642 states and 1552 transitions. [2021-04-15 03:27:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:27:58,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:58,707 INFO L225 Difference]: With dead ends: 642 [2021-04-15 03:27:58,707 INFO L226 Difference]: Without dead ends: 612 [2021-04-15 03:27:58,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:27:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-04-15 03:27:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-04-15 03:27:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.440776699029126) internal successors, (1257), 515 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1257 transitions. [2021-04-15 03:27:58,715 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1257 transitions. Word has length 28 [2021-04-15 03:27:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:58,715 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1257 transitions. [2021-04-15 03:27:58,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1257 transitions. [2021-04-15 03:27:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:58,716 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:58,716 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:58,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:58,916 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 44 times [2021-04-15 03:27:58,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:58,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011282358] [2021-04-15 03:27:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:59,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011282358] [2021-04-15 03:27:59,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474594651] [2021-04-15 03:27:59,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:27:59,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:59,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:27:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:59,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:59,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:27:59,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338833150] [2021-04-15 03:27:59,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:27:59,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:59,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:27:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:59,307 INFO L87 Difference]: Start difference. First operand 516 states and 1257 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:59,702 INFO L93 Difference]: Finished difference Result 674 states and 1632 transitions. [2021-04-15 03:27:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:27:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:59,704 INFO L225 Difference]: With dead ends: 674 [2021-04-15 03:27:59,704 INFO L226 Difference]: Without dead ends: 644 [2021-04-15 03:27:59,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:27:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-04-15 03:27:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 532. [2021-04-15 03:27:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.4425612052730696) internal successors, (1297), 531 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1297 transitions. [2021-04-15 03:27:59,712 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1297 transitions. Word has length 28 [2021-04-15 03:27:59,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:59,712 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1297 transitions. [2021-04-15 03:27:59,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1297 transitions. [2021-04-15 03:27:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:27:59,712 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:59,712 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:59,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:59,913 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:59,913 INFO L82 PathProgramCache]: Analyzing trace with hash -837205826, now seen corresponding path program 45 times [2021-04-15 03:27:59,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:59,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586347334] [2021-04-15 03:27:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:00,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586347334] [2021-04-15 03:28:00,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395597527] [2021-04-15 03:28:00,025 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:00,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:28:00,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:00,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:00,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:00,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:00,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650077500] [2021-04-15 03:28:00,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:00,311 INFO L87 Difference]: Start difference. First operand 532 states and 1297 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:00,777 INFO L93 Difference]: Finished difference Result 698 states and 1688 transitions. [2021-04-15 03:28:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:00,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:00,780 INFO L225 Difference]: With dead ends: 698 [2021-04-15 03:28:00,780 INFO L226 Difference]: Without dead ends: 660 [2021-04-15 03:28:00,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-04-15 03:28:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 532. [2021-04-15 03:28:00,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.4425612052730696) internal successors, (1297), 531 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1297 transitions. [2021-04-15 03:28:00,789 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1297 transitions. Word has length 28 [2021-04-15 03:28:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:00,789 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1297 transitions. [2021-04-15 03:28:00,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1297 transitions. [2021-04-15 03:28:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:00,790 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:00,790 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:01,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-04-15 03:28:01,012 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 46 times [2021-04-15 03:28:01,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:01,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31690436] [2021-04-15 03:28:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31690436] [2021-04-15 03:28:01,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464944051] [2021-04-15 03:28:01,111 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 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 03:28:01,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:01,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:01,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:01,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:01,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446210051] [2021-04-15 03:28:01,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:01,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:01,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:01,425 INFO L87 Difference]: Start difference. First operand 532 states and 1297 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:01,878 INFO L93 Difference]: Finished difference Result 666 states and 1616 transitions. [2021-04-15 03:28:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:01,880 INFO L225 Difference]: With dead ends: 666 [2021-04-15 03:28:01,880 INFO L226 Difference]: Without dead ends: 644 [2021-04-15 03:28:01,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-04-15 03:28:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 548. [2021-04-15 03:28:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.4442413162705665) internal successors, (1337), 547 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1337 transitions. [2021-04-15 03:28:01,889 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1337 transitions. Word has length 28 [2021-04-15 03:28:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:01,889 INFO L480 AbstractCegarLoop]: Abstraction has 548 states and 1337 transitions. [2021-04-15 03:28:01,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1337 transitions. [2021-04-15 03:28:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:01,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:01,890 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:02,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-04-15 03:28:02,113 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:02,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1370406070, now seen corresponding path program 47 times [2021-04-15 03:28:02,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:02,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574479980] [2021-04-15 03:28:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574479980] [2021-04-15 03:28:02,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042373890] [2021-04-15 03:28:02,202 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 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 03:28:02,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:02,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:02,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:02,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684366524] [2021-04-15 03:28:02,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:02,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:02,532 INFO L87 Difference]: Start difference. First operand 548 states and 1337 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:03,075 INFO L93 Difference]: Finished difference Result 682 states and 1644 transitions. [2021-04-15 03:28:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:03,077 INFO L225 Difference]: With dead ends: 682 [2021-04-15 03:28:03,077 INFO L226 Difference]: Without dead ends: 636 [2021-04-15 03:28:03,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 670.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:28:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-04-15 03:28:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-04-15 03:28:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4458259325044405) internal successors, (1377), 563 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1377 transitions. [2021-04-15 03:28:03,086 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1377 transitions. Word has length 28 [2021-04-15 03:28:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:03,086 INFO L480 AbstractCegarLoop]: Abstraction has 564 states and 1377 transitions. [2021-04-15 03:28:03,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1377 transitions. [2021-04-15 03:28:03,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:03,087 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:03,087 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:03,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-04-15 03:28:03,309 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1626330114, now seen corresponding path program 48 times [2021-04-15 03:28:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:03,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274685676] [2021-04-15 03:28:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274685676] [2021-04-15 03:28:03,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276932842] [2021-04-15 03:28:03,410 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 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 03:28:03,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:28:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:03,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702931579] [2021-04-15 03:28:03,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:03,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:03,652 INFO L87 Difference]: Start difference. First operand 564 states and 1377 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:03,999 INFO L93 Difference]: Finished difference Result 738 states and 1792 transitions. [2021-04-15 03:28:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:04,000 INFO L225 Difference]: With dead ends: 738 [2021-04-15 03:28:04,001 INFO L226 Difference]: Without dead ends: 708 [2021-04-15 03:28:04,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-04-15 03:28:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 580. [2021-04-15 03:28:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.447322970639033) internal successors, (1417), 579 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1417 transitions. [2021-04-15 03:28:04,007 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1417 transitions. Word has length 28 [2021-04-15 03:28:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:04,007 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 1417 transitions. [2021-04-15 03:28:04,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1417 transitions. [2021-04-15 03:28:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:04,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:04,008 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:04,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:04,208 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 49 times [2021-04-15 03:28:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:04,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987148316] [2021-04-15 03:28:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:04,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987148316] [2021-04-15 03:28:04,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301852686] [2021-04-15 03:28:04,311 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 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 03:28:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:04,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:04,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:04,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:04,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13494688] [2021-04-15 03:28:04,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:04,570 INFO L87 Difference]: Start difference. First operand 580 states and 1417 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:04,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:04,908 INFO L93 Difference]: Finished difference Result 722 states and 1752 transitions. [2021-04-15 03:28:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:04,910 INFO L225 Difference]: With dead ends: 722 [2021-04-15 03:28:04,910 INFO L226 Difference]: Without dead ends: 692 [2021-04-15 03:28:04,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-04-15 03:28:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 588. [2021-04-15 03:28:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4480408858603067) internal successors, (1437), 587 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1437 transitions. [2021-04-15 03:28:04,916 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1437 transitions. Word has length 28 [2021-04-15 03:28:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:04,916 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1437 transitions. [2021-04-15 03:28:04,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1437 transitions. [2021-04-15 03:28:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:04,917 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:04,917 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:05,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:05,118 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1221808518, now seen corresponding path program 50 times [2021-04-15 03:28:05,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:05,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160766943] [2021-04-15 03:28:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:05,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160766943] [2021-04-15 03:28:05,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806508927] [2021-04-15 03:28:05,198 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 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 03:28:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:05,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:05,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:05,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976738547] [2021-04-15 03:28:05,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:05,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:05,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:05,436 INFO L87 Difference]: Start difference. First operand 588 states and 1437 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:05,816 INFO L93 Difference]: Finished difference Result 698 states and 1696 transitions. [2021-04-15 03:28:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:05,817 INFO L225 Difference]: With dead ends: 698 [2021-04-15 03:28:05,817 INFO L226 Difference]: Without dead ends: 676 [2021-04-15 03:28:05,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 401.9ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-04-15 03:28:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 588. [2021-04-15 03:28:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4480408858603067) internal successors, (1437), 587 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1437 transitions. [2021-04-15 03:28:05,826 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1437 transitions. Word has length 28 [2021-04-15 03:28:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:05,826 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1437 transitions. [2021-04-15 03:28:05,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1437 transitions. [2021-04-15 03:28:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:05,827 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:05,827 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:06,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:06,047 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:06,048 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 51 times [2021-04-15 03:28:06,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:06,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294017789] [2021-04-15 03:28:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294017789] [2021-04-15 03:28:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258317636] [2021-04-15 03:28:06,166 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:06,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:28:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:06,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:06,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200581345] [2021-04-15 03:28:06,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:06,449 INFO L87 Difference]: Start difference. First operand 588 states and 1437 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:06,853 INFO L93 Difference]: Finished difference Result 778 states and 1896 transitions. [2021-04-15 03:28:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:06,853 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:06,855 INFO L225 Difference]: With dead ends: 778 [2021-04-15 03:28:06,855 INFO L226 Difference]: Without dead ends: 756 [2021-04-15 03:28:06,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-04-15 03:28:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 604. [2021-04-15 03:28:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.4494195688225537) internal successors, (1477), 603 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1477 transitions. [2021-04-15 03:28:06,864 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1477 transitions. Word has length 28 [2021-04-15 03:28:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:06,865 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 1477 transitions. [2021-04-15 03:28:06,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:06,865 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1477 transitions. [2021-04-15 03:28:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:06,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:06,866 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:07,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:07,081 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1560146054, now seen corresponding path program 52 times [2021-04-15 03:28:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:07,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741596922] [2021-04-15 03:28:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741596922] [2021-04-15 03:28:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769525693] [2021-04-15 03:28:07,245 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:07,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:07,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:07,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:07,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953728308] [2021-04-15 03:28:07,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:07,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:07,564 INFO L87 Difference]: Start difference. First operand 604 states and 1477 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:07,891 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-04-15 03:28:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:07,893 INFO L225 Difference]: With dead ends: 770 [2021-04-15 03:28:07,893 INFO L226 Difference]: Without dead ends: 748 [2021-04-15 03:28:07,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-04-15 03:28:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 620. [2021-04-15 03:28:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4507269789983845) internal successors, (1517), 619 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1517 transitions. [2021-04-15 03:28:07,900 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1517 transitions. Word has length 28 [2021-04-15 03:28:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:07,900 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1517 transitions. [2021-04-15 03:28:07,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1517 transitions. [2021-04-15 03:28:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:07,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:07,901 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:08,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-04-15 03:28:08,102 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1766084486, now seen corresponding path program 53 times [2021-04-15 03:28:08,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:08,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551630319] [2021-04-15 03:28:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551630319] [2021-04-15 03:28:08,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990805353] [2021-04-15 03:28:08,215 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 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 03:28:08,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:08,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:08,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:08,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:08,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:08,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129941078] [2021-04-15 03:28:08,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:08,482 INFO L87 Difference]: Start difference. First operand 620 states and 1517 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:08,792 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-04-15 03:28:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:08,794 INFO L225 Difference]: With dead ends: 778 [2021-04-15 03:28:08,794 INFO L226 Difference]: Without dead ends: 740 [2021-04-15 03:28:08,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-04-15 03:28:08,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 644. [2021-04-15 03:28:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.452566096423017) internal successors, (1577), 643 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1577 transitions. [2021-04-15 03:28:08,801 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1577 transitions. Word has length 28 [2021-04-15 03:28:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:08,801 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1577 transitions. [2021-04-15 03:28:08,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1577 transitions. [2021-04-15 03:28:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:08,802 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:08,802 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:09,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:09,023 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:09,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:09,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 54 times [2021-04-15 03:28:09,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:09,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628723808] [2021-04-15 03:28:09,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:09,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628723808] [2021-04-15 03:28:09,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960275776] [2021-04-15 03:28:09,216 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:09,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:28:09,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:09,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:09,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:09,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:09,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471710926] [2021-04-15 03:28:09,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:09,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:09,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:09,548 INFO L87 Difference]: Start difference. First operand 644 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:09,977 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-04-15 03:28:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:09,979 INFO L225 Difference]: With dead ends: 778 [2021-04-15 03:28:09,979 INFO L226 Difference]: Without dead ends: 740 [2021-04-15 03:28:09,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-04-15 03:28:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 644. [2021-04-15 03:28:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 2.452566096423017) internal successors, (1577), 643 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1577 transitions. [2021-04-15 03:28:09,986 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1577 transitions. Word has length 28 [2021-04-15 03:28:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:09,986 INFO L480 AbstractCegarLoop]: Abstraction has 644 states and 1577 transitions. [2021-04-15 03:28:09,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1577 transitions. [2021-04-15 03:28:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:09,987 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:09,987 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:10,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:10,189 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 55 times [2021-04-15 03:28:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:10,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983671521] [2021-04-15 03:28:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983671521] [2021-04-15 03:28:10,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75739770] [2021-04-15 03:28:10,297 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:10,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:10,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:10,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:10,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154919014] [2021-04-15 03:28:10,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:10,636 INFO L87 Difference]: Start difference. First operand 644 states and 1577 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:10,989 INFO L93 Difference]: Finished difference Result 786 states and 1912 transitions. [2021-04-15 03:28:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:10,991 INFO L225 Difference]: With dead ends: 786 [2021-04-15 03:28:10,991 INFO L226 Difference]: Without dead ends: 756 [2021-04-15 03:28:10,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-04-15 03:28:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 636. [2021-04-15 03:28:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-04-15 03:28:11,001 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-04-15 03:28:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:11,001 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-04-15 03:28:11,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-04-15 03:28:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:11,002 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:11,002 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:11,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:11,213 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash -490942086, now seen corresponding path program 56 times [2021-04-15 03:28:11,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665635014] [2021-04-15 03:28:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:11,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665635014] [2021-04-15 03:28:11,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586040919] [2021-04-15 03:28:11,337 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:11,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:11,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:11,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:11,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:11,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441399608] [2021-04-15 03:28:11,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:11,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:11,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:11,606 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:11,897 INFO L93 Difference]: Finished difference Result 786 states and 1908 transitions. [2021-04-15 03:28:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:11,898 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:11,899 INFO L225 Difference]: With dead ends: 786 [2021-04-15 03:28:11,899 INFO L226 Difference]: Without dead ends: 748 [2021-04-15 03:28:11,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-04-15 03:28:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 636. [2021-04-15 03:28:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-04-15 03:28:11,905 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-04-15 03:28:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:11,906 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-04-15 03:28:11,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-04-15 03:28:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:11,907 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:11,907 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:12,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-04-15 03:28:12,107 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 57 times [2021-04-15 03:28:12,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:12,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328570099] [2021-04-15 03:28:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:12,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328570099] [2021-04-15 03:28:12,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080753801] [2021-04-15 03:28:12,262 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 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 03:28:12,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:28:12,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:12,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:12,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:12,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226051605] [2021-04-15 03:28:12,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:12,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:12,578 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:12,977 INFO L93 Difference]: Finished difference Result 762 states and 1856 transitions. [2021-04-15 03:28:12,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:12,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:12,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:12,979 INFO L225 Difference]: With dead ends: 762 [2021-04-15 03:28:12,979 INFO L226 Difference]: Without dead ends: 740 [2021-04-15 03:28:12,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-04-15 03:28:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 620. [2021-04-15 03:28:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4507269789983845) internal successors, (1517), 619 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1517 transitions. [2021-04-15 03:28:12,985 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1517 transitions. Word has length 28 [2021-04-15 03:28:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:12,985 INFO L480 AbstractCegarLoop]: Abstraction has 620 states and 1517 transitions. [2021-04-15 03:28:12,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1517 transitions. [2021-04-15 03:28:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:12,986 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:12,986 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:13,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:13,188 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 58 times [2021-04-15 03:28:13,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:13,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143367604] [2021-04-15 03:28:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143367604] [2021-04-15 03:28:13,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042969602] [2021-04-15 03:28:13,260 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 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 03:28:13,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:13,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:13,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:13,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919811347] [2021-04-15 03:28:13,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:13,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:13,533 INFO L87 Difference]: Start difference. First operand 620 states and 1517 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:13,845 INFO L93 Difference]: Finished difference Result 746 states and 1808 transitions. [2021-04-15 03:28:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:13,846 INFO L225 Difference]: With dead ends: 746 [2021-04-15 03:28:13,847 INFO L226 Difference]: Without dead ends: 708 [2021-04-15 03:28:13,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-04-15 03:28:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 636. [2021-04-15 03:28:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.451968503937008) internal successors, (1557), 635 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1557 transitions. [2021-04-15 03:28:13,853 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1557 transitions. Word has length 28 [2021-04-15 03:28:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:13,853 INFO L480 AbstractCegarLoop]: Abstraction has 636 states and 1557 transitions. [2021-04-15 03:28:13,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1557 transitions. [2021-04-15 03:28:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:13,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:13,854 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:14,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:14,055 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 59 times [2021-04-15 03:28:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:14,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322671581] [2021-04-15 03:28:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:14,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322671581] [2021-04-15 03:28:14,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889516051] [2021-04-15 03:28:14,137 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:14,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:14,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:14,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:14,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:14,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:14,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064713970] [2021-04-15 03:28:14,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:14,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:14,423 INFO L87 Difference]: Start difference. First operand 636 states and 1557 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:14,889 INFO L93 Difference]: Finished difference Result 778 states and 1884 transitions. [2021-04-15 03:28:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:14,890 INFO L225 Difference]: With dead ends: 778 [2021-04-15 03:28:14,890 INFO L226 Difference]: Without dead ends: 732 [2021-04-15 03:28:14,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 488.4ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-04-15 03:28:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 652. [2021-04-15 03:28:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.453149001536098) internal successors, (1597), 651 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1597 transitions. [2021-04-15 03:28:14,898 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1597 transitions. Word has length 28 [2021-04-15 03:28:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:14,898 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1597 transitions. [2021-04-15 03:28:14,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1597 transitions. [2021-04-15 03:28:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:14,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:14,899 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:15,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable619 [2021-04-15 03:28:15,103 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2106666118, now seen corresponding path program 60 times [2021-04-15 03:28:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758754558] [2021-04-15 03:28:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758754558] [2021-04-15 03:28:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814490279] [2021-04-15 03:28:15,209 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:15,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:28:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:15,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:15,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928005142] [2021-04-15 03:28:15,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:15,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:15,488 INFO L87 Difference]: Start difference. First operand 652 states and 1597 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:15,819 INFO L93 Difference]: Finished difference Result 754 states and 1832 transitions. [2021-04-15 03:28:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:15,825 INFO L225 Difference]: With dead ends: 754 [2021-04-15 03:28:15,825 INFO L226 Difference]: Without dead ends: 724 [2021-04-15 03:28:15,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-04-15 03:28:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 652. [2021-04-15 03:28:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 2.453149001536098) internal successors, (1597), 651 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1597 transitions. [2021-04-15 03:28:15,835 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1597 transitions. Word has length 28 [2021-04-15 03:28:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:15,835 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 1597 transitions. [2021-04-15 03:28:15,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1597 transitions. [2021-04-15 03:28:15,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:15,836 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:15,836 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:16,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-04-15 03:28:16,057 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 61 times [2021-04-15 03:28:16,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:16,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259320566] [2021-04-15 03:28:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259320566] [2021-04-15 03:28:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602013716] [2021-04-15 03:28:16,149 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 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 03:28:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:16,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:16,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:16,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565211484] [2021-04-15 03:28:16,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:16,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:16,403 INFO L87 Difference]: Start difference. First operand 652 states and 1597 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:16,718 INFO L93 Difference]: Finished difference Result 762 states and 1856 transitions. [2021-04-15 03:28:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:16,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:16,720 INFO L225 Difference]: With dead ends: 762 [2021-04-15 03:28:16,720 INFO L226 Difference]: Without dead ends: 740 [2021-04-15 03:28:16,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-04-15 03:28:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 668. [2021-04-15 03:28:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-04-15 03:28:16,729 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-04-15 03:28:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:16,729 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-04-15 03:28:16,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-04-15 03:28:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:16,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:16,730 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:16,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:16,945 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1787267838, now seen corresponding path program 62 times [2021-04-15 03:28:16,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:16,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855674234] [2021-04-15 03:28:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855674234] [2021-04-15 03:28:17,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521827726] [2021-04-15 03:28:17,040 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:17,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:17,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:17,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:17,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:17,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593256809] [2021-04-15 03:28:17,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:17,256 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:17,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:17,656 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-04-15 03:28:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:17,658 INFO L225 Difference]: With dead ends: 810 [2021-04-15 03:28:17,658 INFO L226 Difference]: Without dead ends: 788 [2021-04-15 03:28:17,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:28:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-04-15 03:28:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 676. [2021-04-15 03:28:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:17,665 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:17,665 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:17,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:17,666 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:17,666 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:17,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-04-15 03:28:17,867 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:17,867 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 63 times [2021-04-15 03:28:17,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:17,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374958617] [2021-04-15 03:28:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:17,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374958617] [2021-04-15 03:28:17,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927043729] [2021-04-15 03:28:17,967 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 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 03:28:17,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:28:17,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:17,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:18,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:18,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:18,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576786120] [2021-04-15 03:28:18,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:18,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:18,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:18,252 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:18,581 INFO L93 Difference]: Finished difference Result 802 states and 1952 transitions. [2021-04-15 03:28:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:18,583 INFO L225 Difference]: With dead ends: 802 [2021-04-15 03:28:18,583 INFO L226 Difference]: Without dead ends: 772 [2021-04-15 03:28:18,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-04-15 03:28:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 676. [2021-04-15 03:28:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:18,592 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:18,593 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:18,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:18,594 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:18,594 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:18,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:18,816 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 64 times [2021-04-15 03:28:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:18,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708835530] [2021-04-15 03:28:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708835530] [2021-04-15 03:28:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295873447] [2021-04-15 03:28:18,924 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:18,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:18,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:18,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653218021] [2021-04-15 03:28:19,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:19,206 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:19,603 INFO L93 Difference]: Finished difference Result 842 states and 2056 transitions. [2021-04-15 03:28:19,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:19,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:19,605 INFO L225 Difference]: With dead ends: 842 [2021-04-15 03:28:19,605 INFO L226 Difference]: Without dead ends: 820 [2021-04-15 03:28:19,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-04-15 03:28:19,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 684. [2021-04-15 03:28:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-04-15 03:28:19,615 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-04-15 03:28:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:19,615 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-04-15 03:28:19,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-04-15 03:28:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:19,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:19,617 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:19,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-04-15 03:28:19,832 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 65 times [2021-04-15 03:28:19,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:19,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370997577] [2021-04-15 03:28:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370997577] [2021-04-15 03:28:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667630608] [2021-04-15 03:28:19,949 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 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 03:28:19,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:28:19,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:19,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:20,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:20,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:20,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679653074] [2021-04-15 03:28:20,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:20,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:20,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:20,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:20,251 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:20,590 INFO L93 Difference]: Finished difference Result 850 states and 2076 transitions. [2021-04-15 03:28:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:20,591 INFO L225 Difference]: With dead ends: 850 [2021-04-15 03:28:20,591 INFO L226 Difference]: Without dead ends: 828 [2021-04-15 03:28:20,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-04-15 03:28:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 676. [2021-04-15 03:28:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:20,598 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:20,598 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:20,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:20,598 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:20,598 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:20,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-04-15 03:28:20,799 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 66 times [2021-04-15 03:28:20,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:20,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238092178] [2021-04-15 03:28:20,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:20,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238092178] [2021-04-15 03:28:20,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138493641] [2021-04-15 03:28:20,895 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 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 03:28:20,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:28:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:21,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:21,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014032244] [2021-04-15 03:28:21,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:21,141 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:21,460 INFO L93 Difference]: Finished difference Result 810 states and 1968 transitions. [2021-04-15 03:28:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:21,461 INFO L225 Difference]: With dead ends: 810 [2021-04-15 03:28:21,461 INFO L226 Difference]: Without dead ends: 772 [2021-04-15 03:28:21,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-04-15 03:28:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 684. [2021-04-15 03:28:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-04-15 03:28:21,469 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-04-15 03:28:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:21,469 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-04-15 03:28:21,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-04-15 03:28:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:21,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:21,470 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:21,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-04-15 03:28:21,670 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:21,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:21,671 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 67 times [2021-04-15 03:28:21,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:21,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879871278] [2021-04-15 03:28:21,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879871278] [2021-04-15 03:28:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381707698] [2021-04-15 03:28:21,788 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 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 03:28:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:22,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:22,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77849277] [2021-04-15 03:28:22,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:22,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:22,111 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:22,484 INFO L93 Difference]: Finished difference Result 826 states and 2008 transitions. [2021-04-15 03:28:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:22,485 INFO L225 Difference]: With dead ends: 826 [2021-04-15 03:28:22,485 INFO L226 Difference]: Without dead ends: 788 [2021-04-15 03:28:22,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 601.8ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-04-15 03:28:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-04-15 03:28:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-04-15 03:28:22,492 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-04-15 03:28:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:22,492 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-04-15 03:28:22,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-04-15 03:28:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:22,493 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:22,493 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:22,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:22,694 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:22,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:22,694 INFO L82 PathProgramCache]: Analyzing trace with hash 578117558, now seen corresponding path program 68 times [2021-04-15 03:28:22,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:22,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358575648] [2021-04-15 03:28:22,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358575648] [2021-04-15 03:28:22,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807258942] [2021-04-15 03:28:22,795 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 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 03:28:22,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:23,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:23,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:23,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572797770] [2021-04-15 03:28:23,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:23,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:23,084 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:23,545 INFO L93 Difference]: Finished difference Result 850 states and 2064 transitions. [2021-04-15 03:28:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:23,546 INFO L225 Difference]: With dead ends: 850 [2021-04-15 03:28:23,546 INFO L226 Difference]: Without dead ends: 804 [2021-04-15 03:28:23,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-04-15 03:28:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 660. [2021-04-15 03:28:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-04-15 03:28:23,554 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-04-15 03:28:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:23,555 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-04-15 03:28:23,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-04-15 03:28:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:23,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:23,556 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:23,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-04-15 03:28:23,756 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash 52089722, now seen corresponding path program 69 times [2021-04-15 03:28:23,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:23,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570189987] [2021-04-15 03:28:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570189987] [2021-04-15 03:28:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683847032] [2021-04-15 03:28:23,828 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 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 03:28:23,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:28:23,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:24,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:24,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:24,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814479064] [2021-04-15 03:28:24,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:24,037 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:24,434 INFO L93 Difference]: Finished difference Result 786 states and 1908 transitions. [2021-04-15 03:28:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:24,435 INFO L225 Difference]: With dead ends: 786 [2021-04-15 03:28:24,435 INFO L226 Difference]: Without dead ends: 748 [2021-04-15 03:28:24,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:28:24,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-04-15 03:28:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 676. [2021-04-15 03:28:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:24,444 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:24,444 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:24,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:24,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:24,445 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:24,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:24,661 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:24,661 INFO L82 PathProgramCache]: Analyzing trace with hash 239780022, now seen corresponding path program 70 times [2021-04-15 03:28:24,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:24,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632579522] [2021-04-15 03:28:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632579522] [2021-04-15 03:28:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634769111] [2021-04-15 03:28:24,742 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 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 03:28:24,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:24,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:24,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:24,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735994605] [2021-04-15 03:28:24,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:24,993 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:25,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:25,368 INFO L93 Difference]: Finished difference Result 818 states and 1984 transitions. [2021-04-15 03:28:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:25,369 INFO L225 Difference]: With dead ends: 818 [2021-04-15 03:28:25,369 INFO L226 Difference]: Without dead ends: 772 [2021-04-15 03:28:25,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-04-15 03:28:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 684. [2021-04-15 03:28:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-04-15 03:28:25,376 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-04-15 03:28:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:25,377 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-04-15 03:28:25,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-04-15 03:28:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:25,377 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:25,378 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:25,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable764,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:25,578 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1225296774, now seen corresponding path program 71 times [2021-04-15 03:28:25,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:25,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174016056] [2021-04-15 03:28:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174016056] [2021-04-15 03:28:25,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471371632] [2021-04-15 03:28:25,685 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 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 03:28:25,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:25,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:25,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:25,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:25,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:25,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630668125] [2021-04-15 03:28:25,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:25,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:25,947 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:26,286 INFO L93 Difference]: Finished difference Result 802 states and 1952 transitions. [2021-04-15 03:28:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:26,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:26,288 INFO L225 Difference]: With dead ends: 802 [2021-04-15 03:28:26,288 INFO L226 Difference]: Without dead ends: 772 [2021-04-15 03:28:26,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-04-15 03:28:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 660. [2021-04-15 03:28:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-04-15 03:28:26,294 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-04-15 03:28:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:26,294 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-04-15 03:28:26,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-04-15 03:28:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:26,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:26,295 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:26,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-04-15 03:28:26,509 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 72 times [2021-04-15 03:28:26,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:26,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86637003] [2021-04-15 03:28:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:26,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86637003] [2021-04-15 03:28:26,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784334615] [2021-04-15 03:28:26,597 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 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 03:28:26,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:28:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:26,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:26,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:26,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:26,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054550695] [2021-04-15 03:28:26,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:26,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:26,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:26,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:26,841 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:27,457 INFO L93 Difference]: Finished difference Result 826 states and 2012 transitions. [2021-04-15 03:28:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:28:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:27,458 INFO L225 Difference]: With dead ends: 826 [2021-04-15 03:28:27,458 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 03:28:27,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 697.3ms TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:28:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 03:28:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 660. [2021-04-15 03:28:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-04-15 03:28:27,465 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-04-15 03:28:27,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:27,465 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-04-15 03:28:27,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-04-15 03:28:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:27,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:27,466 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:27,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-04-15 03:28:27,666 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1736594298, now seen corresponding path program 73 times [2021-04-15 03:28:27,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:27,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404591661] [2021-04-15 03:28:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:27,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404591661] [2021-04-15 03:28:27,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203884691] [2021-04-15 03:28:27,784 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 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 03:28:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:28,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:28,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465500138] [2021-04-15 03:28:28,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:28,056 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:28,428 INFO L93 Difference]: Finished difference Result 802 states and 1948 transitions. [2021-04-15 03:28:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:28,429 INFO L225 Difference]: With dead ends: 802 [2021-04-15 03:28:28,429 INFO L226 Difference]: Without dead ends: 764 [2021-04-15 03:28:28,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-04-15 03:28:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 668. [2021-04-15 03:28:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-04-15 03:28:28,437 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-04-15 03:28:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:28,437 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-04-15 03:28:28,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:28,438 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-04-15 03:28:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:28,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:28,439 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:28,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable801,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:28,645 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 74 times [2021-04-15 03:28:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:28,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683167523] [2021-04-15 03:28:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683167523] [2021-04-15 03:28:28,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271224612] [2021-04-15 03:28:28,768 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 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 03:28:28,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:29,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:29,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830996810] [2021-04-15 03:28:29,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:29,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:29,087 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:29,556 INFO L93 Difference]: Finished difference Result 850 states and 2064 transitions. [2021-04-15 03:28:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:29,557 INFO L225 Difference]: With dead ends: 850 [2021-04-15 03:28:29,557 INFO L226 Difference]: Without dead ends: 804 [2021-04-15 03:28:29,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-04-15 03:28:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 660. [2021-04-15 03:28:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.4537177541729895) internal successors, (1617), 659 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:29,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1617 transitions. [2021-04-15 03:28:29,564 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1617 transitions. Word has length 28 [2021-04-15 03:28:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:29,564 INFO L480 AbstractCegarLoop]: Abstraction has 660 states and 1617 transitions. [2021-04-15 03:28:29,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:29,564 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1617 transitions. [2021-04-15 03:28:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:29,565 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:29,565 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:29,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-04-15 03:28:29,765 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 75 times [2021-04-15 03:28:29,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:29,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594309661] [2021-04-15 03:28:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594309661] [2021-04-15 03:28:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323185046] [2021-04-15 03:28:29,847 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 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 03:28:29,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:28:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:29,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:30,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:30,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:30,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129034123] [2021-04-15 03:28:30,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:30,074 INFO L87 Difference]: Start difference. First operand 660 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:30,353 INFO L93 Difference]: Finished difference Result 778 states and 1888 transitions. [2021-04-15 03:28:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:30,354 INFO L225 Difference]: With dead ends: 778 [2021-04-15 03:28:30,354 INFO L226 Difference]: Without dead ends: 740 [2021-04-15 03:28:30,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-04-15 03:28:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 668. [2021-04-15 03:28:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-04-15 03:28:30,361 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-04-15 03:28:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:30,361 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-04-15 03:28:30,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-04-15 03:28:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:30,362 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:30,362 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:30,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:30,562 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 76 times [2021-04-15 03:28:30,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:30,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245775439] [2021-04-15 03:28:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:30,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245775439] [2021-04-15 03:28:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644722679] [2021-04-15 03:28:30,650 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:30,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:30,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:30,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:30,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:30,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344465707] [2021-04-15 03:28:30,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:30,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:30,918 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:31,321 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-04-15 03:28:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:31,322 INFO L225 Difference]: With dead ends: 810 [2021-04-15 03:28:31,322 INFO L226 Difference]: Without dead ends: 788 [2021-04-15 03:28:31,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 535.0ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-04-15 03:28:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 676. [2021-04-15 03:28:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:31,329 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:31,329 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:31,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:31,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:31,330 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:31,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable843 [2021-04-15 03:28:31,531 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 77 times [2021-04-15 03:28:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:31,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191202255] [2021-04-15 03:28:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:31,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191202255] [2021-04-15 03:28:31,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508224311] [2021-04-15 03:28:31,670 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 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 03:28:31,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:31,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:31,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:31,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:31,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:31,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:31,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173561147] [2021-04-15 03:28:31,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:31,968 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:32,407 INFO L93 Difference]: Finished difference Result 754 states and 1836 transitions. [2021-04-15 03:28:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:32,408 INFO L225 Difference]: With dead ends: 754 [2021-04-15 03:28:32,408 INFO L226 Difference]: Without dead ends: 732 [2021-04-15 03:28:32,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 631.7ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:28:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-04-15 03:28:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 676. [2021-04-15 03:28:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.454814814814815) internal successors, (1657), 675 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1657 transitions. [2021-04-15 03:28:32,415 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1657 transitions. Word has length 28 [2021-04-15 03:28:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 1657 transitions. [2021-04-15 03:28:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1657 transitions. [2021-04-15 03:28:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:32,417 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:32,417 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:32,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-04-15 03:28:32,617 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 78 times [2021-04-15 03:28:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175487947] [2021-04-15 03:28:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175487947] [2021-04-15 03:28:32,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538241580] [2021-04-15 03:28:32,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:28:32,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:28:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:32,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:32,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:32,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44581092] [2021-04-15 03:28:32,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:32,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:32,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:32,987 INFO L87 Difference]: Start difference. First operand 676 states and 1657 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:33,372 INFO L93 Difference]: Finished difference Result 810 states and 1976 transitions. [2021-04-15 03:28:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:33,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:33,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:33,373 INFO L225 Difference]: With dead ends: 810 [2021-04-15 03:28:33,373 INFO L226 Difference]: Without dead ends: 788 [2021-04-15 03:28:33,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:33,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-04-15 03:28:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-04-15 03:28:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.454272863568216) internal successors, (1637), 667 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1637 transitions. [2021-04-15 03:28:33,379 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1637 transitions. Word has length 28 [2021-04-15 03:28:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:33,380 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 1637 transitions. [2021-04-15 03:28:33,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1637 transitions. [2021-04-15 03:28:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:33,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:33,380 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:33,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable868 [2021-04-15 03:28:33,581 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:33,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:33,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 79 times [2021-04-15 03:28:33,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:33,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607839446] [2021-04-15 03:28:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607839446] [2021-04-15 03:28:33,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42176875] [2021-04-15 03:28:33,678 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 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 03:28:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:33,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:33,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:33,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:33,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395228933] [2021-04-15 03:28:33,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:33,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:33,920 INFO L87 Difference]: Start difference. First operand 668 states and 1637 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:34,378 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-04-15 03:28:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:34,379 INFO L225 Difference]: With dead ends: 842 [2021-04-15 03:28:34,379 INFO L226 Difference]: Without dead ends: 812 [2021-04-15 03:28:34,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-04-15 03:28:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-04-15 03:28:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4553440702781844) internal successors, (1677), 683 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1677 transitions. [2021-04-15 03:28:34,386 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1677 transitions. Word has length 28 [2021-04-15 03:28:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:34,386 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1677 transitions. [2021-04-15 03:28:34,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:34,386 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1677 transitions. [2021-04-15 03:28:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:34,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:34,387 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:34,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable887,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:34,588 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:34,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 80 times [2021-04-15 03:28:34,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:34,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087093366] [2021-04-15 03:28:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087093366] [2021-04-15 03:28:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287246559] [2021-04-15 03:28:34,679 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:34,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:34,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:34,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:34,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:34,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:34,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877062588] [2021-04-15 03:28:34,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:34,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:34,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:34,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:34,901 INFO L87 Difference]: Start difference. First operand 684 states and 1677 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:35,244 INFO L93 Difference]: Finished difference Result 842 states and 2056 transitions. [2021-04-15 03:28:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:35,246 INFO L225 Difference]: With dead ends: 842 [2021-04-15 03:28:35,246 INFO L226 Difference]: Without dead ends: 820 [2021-04-15 03:28:35,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:28:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-04-15 03:28:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 708. [2021-04-15 03:28:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.4568599717114568) internal successors, (1737), 707 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1737 transitions. [2021-04-15 03:28:35,253 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1737 transitions. Word has length 28 [2021-04-15 03:28:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:35,254 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 1737 transitions. [2021-04-15 03:28:35,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1737 transitions. [2021-04-15 03:28:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:35,254 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:35,254 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:35,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable902 [2021-04-15 03:28:35,455 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 81 times [2021-04-15 03:28:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:35,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849673676] [2021-04-15 03:28:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:35,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849673676] [2021-04-15 03:28:35,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721209585] [2021-04-15 03:28:35,551 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 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 03:28:35,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:28:35,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:35,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:35,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191745398] [2021-04-15 03:28:35,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:35,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:35,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:35,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:35,770 INFO L87 Difference]: Start difference. First operand 708 states and 1737 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:36,055 INFO L93 Difference]: Finished difference Result 826 states and 2012 transitions. [2021-04-15 03:28:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:36,057 INFO L225 Difference]: With dead ends: 826 [2021-04-15 03:28:36,057 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 03:28:36,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:28:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 03:28:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 724. [2021-04-15 03:28:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-04-15 03:28:36,064 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-04-15 03:28:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:36,064 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-04-15 03:28:36,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-04-15 03:28:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:36,065 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:36,065 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:36,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable912 [2021-04-15 03:28:36,266 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 82 times [2021-04-15 03:28:36,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:36,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947145892] [2021-04-15 03:28:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:36,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947145892] [2021-04-15 03:28:36,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679122551] [2021-04-15 03:28:36,415 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:36,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:36,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:36,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:36,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808221677] [2021-04-15 03:28:36,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:36,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:36,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:36,712 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:37,114 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-04-15 03:28:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:37,115 INFO L225 Difference]: With dead ends: 818 [2021-04-15 03:28:37,115 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 03:28:37,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:28:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 03:28:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 724. [2021-04-15 03:28:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-04-15 03:28:37,122 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-04-15 03:28:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:37,122 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-04-15 03:28:37,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-04-15 03:28:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:28:37,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:37,123 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:37,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:37,324 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1790463502, now seen corresponding path program 83 times [2021-04-15 03:28:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8410372] [2021-04-15 03:28:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:37,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8410372] [2021-04-15 03:28:37,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794407944] [2021-04-15 03:28:37,424 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 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 03:28:37,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:28:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:37,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:37,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:28:37,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005073188] [2021-04-15 03:28:37,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:28:37,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:28:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:37,656 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:37,974 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-04-15 03:28:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:28:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:37,976 INFO L225 Difference]: With dead ends: 818 [2021-04-15 03:28:37,976 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 03:28:37,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:28:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 03:28:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-04-15 03:28:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-04-15 03:28:37,986 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-04-15 03:28:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:37,986 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-04-15 03:28:37,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-04-15 03:28:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:37,987 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:37,987 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:38,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:38,208 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 84 times [2021-04-15 03:28:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:38,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209985931] [2021-04-15 03:28:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:38,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209985931] [2021-04-15 03:28:38,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233280284] [2021-04-15 03:28:38,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:38,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:28:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:38,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:38,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:38,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410478446] [2021-04-15 03:28:38,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:38,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:38,631 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:39,023 INFO L93 Difference]: Finished difference Result 818 states and 1996 transitions. [2021-04-15 03:28:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:39,024 INFO L225 Difference]: With dead ends: 818 [2021-04-15 03:28:39,024 INFO L226 Difference]: Without dead ends: 796 [2021-04-15 03:28:39,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:28:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-04-15 03:28:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 732. [2021-04-15 03:28:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-04-15 03:28:39,031 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 30 [2021-04-15 03:28:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:39,031 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-04-15 03:28:39,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-04-15 03:28:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:39,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:39,032 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:39,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:39,232 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 85 times [2021-04-15 03:28:39,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:39,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110649460] [2021-04-15 03:28:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:39,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110649460] [2021-04-15 03:28:39,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889687446] [2021-04-15 03:28:39,397 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 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 03:28:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:39,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:39,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:39,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:39,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071139201] [2021-04-15 03:28:39,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:39,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:39,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:39,700 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:40,128 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-04-15 03:28:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:40,129 INFO L225 Difference]: With dead ends: 890 [2021-04-15 03:28:40,129 INFO L226 Difference]: Without dead ends: 860 [2021-04-15 03:28:40,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 03:28:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-04-15 03:28:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 740. [2021-04-15 03:28:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-04-15 03:28:40,136 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 30 [2021-04-15 03:28:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:40,137 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-04-15 03:28:40,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-04-15 03:28:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:40,137 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:40,137 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:40,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-04-15 03:28:40,338 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 86 times [2021-04-15 03:28:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:40,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105578327] [2021-04-15 03:28:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:40,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105578327] [2021-04-15 03:28:40,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567325476] [2021-04-15 03:28:40,472 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 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 03:28:40,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:40,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:40,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:40,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:40,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864931446] [2021-04-15 03:28:40,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:40,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:40,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:40,791 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:41,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:41,418 INFO L93 Difference]: Finished difference Result 986 states and 2408 transitions. [2021-04-15 03:28:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:28:41,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:41,419 INFO L225 Difference]: With dead ends: 986 [2021-04-15 03:28:41,419 INFO L226 Difference]: Without dead ends: 948 [2021-04-15 03:28:41,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:28:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-04-15 03:28:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 756. [2021-04-15 03:28:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-04-15 03:28:41,427 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 30 [2021-04-15 03:28:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:41,427 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-04-15 03:28:41,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-04-15 03:28:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:41,428 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:41,428 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:41,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-04-15 03:28:41,628 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:41,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1219313220, now seen corresponding path program 87 times [2021-04-15 03:28:41,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:41,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697509346] [2021-04-15 03:28:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:41,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697509346] [2021-04-15 03:28:41,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267685134] [2021-04-15 03:28:41,735 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 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 03:28:41,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:28:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:41,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:41,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:41,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220725338] [2021-04-15 03:28:41,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:41,995 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:42,365 INFO L93 Difference]: Finished difference Result 954 states and 2332 transitions. [2021-04-15 03:28:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:42,366 INFO L225 Difference]: With dead ends: 954 [2021-04-15 03:28:42,366 INFO L226 Difference]: Without dead ends: 924 [2021-04-15 03:28:42,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:28:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-04-15 03:28:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 772. [2021-04-15 03:28:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.4604409857328147) internal successors, (1897), 771 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1897 transitions. [2021-04-15 03:28:42,379 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1897 transitions. Word has length 30 [2021-04-15 03:28:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:42,379 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 1897 transitions. [2021-04-15 03:28:42,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1897 transitions. [2021-04-15 03:28:42,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:42,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:42,380 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:42,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-04-15 03:28:42,601 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 88 times [2021-04-15 03:28:42,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:42,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224403816] [2021-04-15 03:28:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:42,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224403816] [2021-04-15 03:28:42,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400438234] [2021-04-15 03:28:42,722 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 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 03:28:42,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:42,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:43,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:43,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403787200] [2021-04-15 03:28:43,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:43,033 INFO L87 Difference]: Start difference. First operand 772 states and 1897 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:43,509 INFO L93 Difference]: Finished difference Result 1002 states and 2448 transitions. [2021-04-15 03:28:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:43,510 INFO L225 Difference]: With dead ends: 1002 [2021-04-15 03:28:43,510 INFO L226 Difference]: Without dead ends: 964 [2021-04-15 03:28:43,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:28:43,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-04-15 03:28:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 796. [2021-04-15 03:28:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.4616352201257863) internal successors, (1957), 795 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 03:28:43,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1957 transitions. [2021-04-15 03:28:43,518 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1957 transitions. Word has length 30 [2021-04-15 03:28:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:43,518 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 1957 transitions. [2021-04-15 03:28:43,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1957 transitions. [2021-04-15 03:28:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:43,519 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:43,519 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:43,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable998,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:43,720 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 89 times [2021-04-15 03:28:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:43,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922972786] [2021-04-15 03:28:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:43,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922972786] [2021-04-15 03:28:43,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418110356] [2021-04-15 03:28:43,922 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 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 03:28:43,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:28:43,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:43,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:44,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:44,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:44,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236206680] [2021-04-15 03:28:44,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:44,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:44,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:44,266 INFO L87 Difference]: Start difference. First operand 796 states and 1957 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:44,867 INFO L93 Difference]: Finished difference Result 1182 states and 2852 transitions. [2021-04-15 03:28:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:28:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:44,870 INFO L225 Difference]: With dead ends: 1182 [2021-04-15 03:28:44,870 INFO L226 Difference]: Without dead ends: 1140 [2021-04-15 03:28:44,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:28:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-04-15 03:28:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 852. [2021-04-15 03:28:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.4688601645123383) internal successors, (2101), 851 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2101 transitions. [2021-04-15 03:28:44,882 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2101 transitions. Word has length 30 [2021-04-15 03:28:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:44,882 INFO L480 AbstractCegarLoop]: Abstraction has 852 states and 2101 transitions. [2021-04-15 03:28:44,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2101 transitions. [2021-04-15 03:28:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:44,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:44,884 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:45,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:45,106 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 90 times [2021-04-15 03:28:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:45,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625574451] [2021-04-15 03:28:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:45,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625574451] [2021-04-15 03:28:45,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2925860] [2021-04-15 03:28:45,232 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 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 03:28:45,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:28:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:45,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:45,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:45,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899988280] [2021-04-15 03:28:45,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:45,629 INFO L87 Difference]: Start difference. First operand 852 states and 2101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:46,240 INFO L93 Difference]: Finished difference Result 1194 states and 2928 transitions. [2021-04-15 03:28:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:46,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:46,241 INFO L225 Difference]: With dead ends: 1194 [2021-04-15 03:28:46,241 INFO L226 Difference]: Without dead ends: 1148 [2021-04-15 03:28:46,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:28:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-04-15 03:28:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 940. [2021-04-15 03:28:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.4717784877529287) internal successors, (2321), 939 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2321 transitions. [2021-04-15 03:28:46,250 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2321 transitions. Word has length 30 [2021-04-15 03:28:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:46,250 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2321 transitions. [2021-04-15 03:28:46,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2321 transitions. [2021-04-15 03:28:46,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:46,251 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:46,251 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:46,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-04-15 03:28:46,454 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1466359492, now seen corresponding path program 91 times [2021-04-15 03:28:46,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:46,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374056800] [2021-04-15 03:28:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:46,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374056800] [2021-04-15 03:28:46,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614588508] [2021-04-15 03:28:46,779 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:47,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:47,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455433347] [2021-04-15 03:28:47,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:47,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:47,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:47,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:47,324 INFO L87 Difference]: Start difference. First operand 940 states and 2321 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:48,212 INFO L93 Difference]: Finished difference Result 1074 states and 2636 transitions. [2021-04-15 03:28:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:28:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:48,214 INFO L225 Difference]: With dead ends: 1074 [2021-04-15 03:28:48,214 INFO L226 Difference]: Without dead ends: 1044 [2021-04-15 03:28:48,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:28:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-04-15 03:28:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 948. [2021-04-15 03:28:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.4720168954593453) internal successors, (2341), 947 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2341 transitions. [2021-04-15 03:28:48,228 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2341 transitions. Word has length 30 [2021-04-15 03:28:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:48,228 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 2341 transitions. [2021-04-15 03:28:48,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2341 transitions. [2021-04-15 03:28:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:48,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:48,230 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:48,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:48,450 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 92 times [2021-04-15 03:28:48,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:48,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427717117] [2021-04-15 03:28:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:48,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427717117] [2021-04-15 03:28:48,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824359492] [2021-04-15 03:28:48,641 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 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 03:28:48,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:48,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:49,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:49,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939454449] [2021-04-15 03:28:49,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:49,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:49,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:49,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:49,025 INFO L87 Difference]: Start difference. First operand 948 states and 2341 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:49,512 INFO L93 Difference]: Finished difference Result 1296 states and 3151 transitions. [2021-04-15 03:28:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:28:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:49,514 INFO L225 Difference]: With dead ends: 1296 [2021-04-15 03:28:49,514 INFO L226 Difference]: Without dead ends: 1266 [2021-04-15 03:28:49,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 669.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:28:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-04-15 03:28:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1012. [2021-04-15 03:28:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.477744807121662) internal successors, (2505), 1011 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2505 transitions. [2021-04-15 03:28:49,524 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2505 transitions. Word has length 30 [2021-04-15 03:28:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:49,524 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2505 transitions. [2021-04-15 03:28:49,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2505 transitions. [2021-04-15 03:28:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:49,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:49,525 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:49,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1055,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:49,726 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 93 times [2021-04-15 03:28:49,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:49,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835995309] [2021-04-15 03:28:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:49,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835995309] [2021-04-15 03:28:49,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117463981] [2021-04-15 03:28:49,912 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:49,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:28:49,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:50,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:50,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004111327] [2021-04-15 03:28:50,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:50,303 INFO L87 Difference]: Start difference. First operand 1012 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:50,989 INFO L93 Difference]: Finished difference Result 1582 states and 3856 transitions. [2021-04-15 03:28:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:28:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:50,992 INFO L225 Difference]: With dead ends: 1582 [2021-04-15 03:28:50,992 INFO L226 Difference]: Without dead ends: 1524 [2021-04-15 03:28:50,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:28:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-04-15 03:28:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1124. [2021-04-15 03:28:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 2.4799643811219947) internal successors, (2785), 1123 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2785 transitions. [2021-04-15 03:28:51,007 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2785 transitions. Word has length 30 [2021-04-15 03:28:51,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:51,007 INFO L480 AbstractCegarLoop]: Abstraction has 1124 states and 2785 transitions. [2021-04-15 03:28:51,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2785 transitions. [2021-04-15 03:28:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:51,008 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:51,008 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:51,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:51,217 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:51,217 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 94 times [2021-04-15 03:28:51,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:51,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605770878] [2021-04-15 03:28:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:51,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605770878] [2021-04-15 03:28:51,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551350049] [2021-04-15 03:28:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:51,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:51,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:51,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:51,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873275219] [2021-04-15 03:28:51,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:51,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:51,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:51,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:51,706 INFO L87 Difference]: Start difference. First operand 1124 states and 2785 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:52,315 INFO L93 Difference]: Finished difference Result 1402 states and 3460 transitions. [2021-04-15 03:28:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:28:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:52,317 INFO L225 Difference]: With dead ends: 1402 [2021-04-15 03:28:52,317 INFO L226 Difference]: Without dead ends: 1372 [2021-04-15 03:28:52,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:28:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-04-15 03:28:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1156. [2021-04-15 03:28:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.4805194805194803) internal successors, (2865), 1155 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2865 transitions. [2021-04-15 03:28:52,328 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2865 transitions. Word has length 30 [2021-04-15 03:28:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:52,328 INFO L480 AbstractCegarLoop]: Abstraction has 1156 states and 2865 transitions. [2021-04-15 03:28:52,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2865 transitions. [2021-04-15 03:28:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:52,329 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:52,329 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:52,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:52,529 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 91622392, now seen corresponding path program 95 times [2021-04-15 03:28:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:52,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268788840] [2021-04-15 03:28:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268788840] [2021-04-15 03:28:52,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51300079] [2021-04-15 03:28:52,740 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 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 03:28:52,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:28:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:52,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:53,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:53,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:53,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190327036] [2021-04-15 03:28:53,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:53,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:53,179 INFO L87 Difference]: Start difference. First operand 1156 states and 2865 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:53,797 INFO L93 Difference]: Finished difference Result 1458 states and 3596 transitions. [2021-04-15 03:28:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:28:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:53,799 INFO L225 Difference]: With dead ends: 1458 [2021-04-15 03:28:53,799 INFO L226 Difference]: Without dead ends: 1420 [2021-04-15 03:28:53,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 930.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:28:53,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-04-15 03:28:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1188. [2021-04-15 03:28:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.481044650379107) internal successors, (2945), 1187 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 2945 transitions. [2021-04-15 03:28:53,809 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 2945 transitions. Word has length 30 [2021-04-15 03:28:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:53,809 INFO L480 AbstractCegarLoop]: Abstraction has 1188 states and 2945 transitions. [2021-04-15 03:28:53,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 2945 transitions. [2021-04-15 03:28:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:53,811 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:53,811 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:54,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-04-15 03:28:54,012 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 96 times [2021-04-15 03:28:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:54,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166158268] [2021-04-15 03:28:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166158268] [2021-04-15 03:28:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670069009] [2021-04-15 03:28:54,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:28:54,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:28:54,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:54,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:54,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:54,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032468641] [2021-04-15 03:28:54,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:54,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:54,545 INFO L87 Difference]: Start difference. First operand 1188 states and 2945 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:55,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:55,095 INFO L93 Difference]: Finished difference Result 1536 states and 3755 transitions. [2021-04-15 03:28:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:28:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:55,097 INFO L225 Difference]: With dead ends: 1536 [2021-04-15 03:28:55,097 INFO L226 Difference]: Without dead ends: 1506 [2021-04-15 03:28:55,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 772.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:28:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-04-15 03:28:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1212. [2021-04-15 03:28:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.481420313790256) internal successors, (3005), 1211 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 3005 transitions. [2021-04-15 03:28:55,109 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 3005 transitions. Word has length 30 [2021-04-15 03:28:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:55,109 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 3005 transitions. [2021-04-15 03:28:55,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 3005 transitions. [2021-04-15 03:28:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:55,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:55,110 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:55,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1130,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:55,311 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 97 times [2021-04-15 03:28:55,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:55,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676570000] [2021-04-15 03:28:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:55,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676570000] [2021-04-15 03:28:55,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983068952] [2021-04-15 03:28:55,434 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 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 03:28:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:55,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:55,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:55,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597365544] [2021-04-15 03:28:55,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:55,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:55,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:55,783 INFO L87 Difference]: Start difference. First operand 1212 states and 3005 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:56,401 INFO L93 Difference]: Finished difference Result 1426 states and 3520 transitions. [2021-04-15 03:28:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:28:56,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:56,403 INFO L225 Difference]: With dead ends: 1426 [2021-04-15 03:28:56,403 INFO L226 Difference]: Without dead ends: 1396 [2021-04-15 03:28:56,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 755.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:28:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-04-15 03:28:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1212. [2021-04-15 03:28:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.481420313790256) internal successors, (3005), 1211 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 3005 transitions. [2021-04-15 03:28:56,413 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 3005 transitions. Word has length 30 [2021-04-15 03:28:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:56,413 INFO L480 AbstractCegarLoop]: Abstraction has 1212 states and 3005 transitions. [2021-04-15 03:28:56,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 3005 transitions. [2021-04-15 03:28:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:56,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:56,414 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:56,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1145 [2021-04-15 03:28:56,615 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1535515836, now seen corresponding path program 98 times [2021-04-15 03:28:56,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:56,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060349783] [2021-04-15 03:28:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060349783] [2021-04-15 03:28:56,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466087611] [2021-04-15 03:28:56,756 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 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 03:28:56,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:56,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:57,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:57,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718904451] [2021-04-15 03:28:57,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:57,178 INFO L87 Difference]: Start difference. First operand 1212 states and 3005 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:57,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:57,767 INFO L93 Difference]: Finished difference Result 1498 states and 3700 transitions. [2021-04-15 03:28:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:57,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:57,769 INFO L225 Difference]: With dead ends: 1498 [2021-04-15 03:28:57,769 INFO L226 Difference]: Without dead ends: 1468 [2021-04-15 03:28:57,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 837.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:28:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-04-15 03:28:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1236. [2021-04-15 03:28:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.4817813765182186) internal successors, (3065), 1235 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3065 transitions. [2021-04-15 03:28:57,780 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3065 transitions. Word has length 30 [2021-04-15 03:28:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:57,780 INFO L480 AbstractCegarLoop]: Abstraction has 1236 states and 3065 transitions. [2021-04-15 03:28:57,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3065 transitions. [2021-04-15 03:28:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:57,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:57,781 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:57,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-04-15 03:28:57,982 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1385267396, now seen corresponding path program 99 times [2021-04-15 03:28:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279836288] [2021-04-15 03:28:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:58,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279836288] [2021-04-15 03:28:58,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200994510] [2021-04-15 03:28:58,106 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 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 03:28:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:28:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403039757] [2021-04-15 03:28:58,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:58,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:58,475 INFO L87 Difference]: Start difference. First operand 1236 states and 3065 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:59,083 INFO L93 Difference]: Finished difference Result 1522 states and 3760 transitions. [2021-04-15 03:28:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:28:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:28:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:59,085 INFO L225 Difference]: With dead ends: 1522 [2021-04-15 03:28:59,085 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 03:28:59,085 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:28:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 03:28:59,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1260. [2021-04-15 03:28:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.4821286735504366) internal successors, (3125), 1259 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3125 transitions. [2021-04-15 03:28:59,097 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3125 transitions. Word has length 30 [2021-04-15 03:28:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:59,097 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 3125 transitions. [2021-04-15 03:28:59,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3125 transitions. [2021-04-15 03:28:59,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:28:59,098 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:59,098 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:59,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:59,299 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1416606080, now seen corresponding path program 100 times [2021-04-15 03:28:59,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:59,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227189316] [2021-04-15 03:28:59,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227189316] [2021-04-15 03:28:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244931963] [2021-04-15 03:28:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:28:59,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:28:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:59,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:59,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:28:59,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182452305] [2021-04-15 03:28:59,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:28:59,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:28:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:59,865 INFO L87 Difference]: Start difference. First operand 1260 states and 3125 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:00,398 INFO L93 Difference]: Finished difference Result 1450 states and 3580 transitions. [2021-04-15 03:29:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:00,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:00,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:00,401 INFO L225 Difference]: With dead ends: 1450 [2021-04-15 03:29:00,401 INFO L226 Difference]: Without dead ends: 1420 [2021-04-15 03:29:00,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 775.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:29:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-04-15 03:29:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1268. [2021-04-15 03:29:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 2.4822415153906867) internal successors, (3145), 1267 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3145 transitions. [2021-04-15 03:29:00,414 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3145 transitions. Word has length 30 [2021-04-15 03:29:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:00,414 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 3145 transitions. [2021-04-15 03:29:00,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3145 transitions. [2021-04-15 03:29:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:00,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:00,415 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:00,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1199,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:00,616 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 101 times [2021-04-15 03:29:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:00,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602892407] [2021-04-15 03:29:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:00,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602892407] [2021-04-15 03:29:00,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214914403] [2021-04-15 03:29:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:29:00,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:29:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:01,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:01,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:01,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847719364] [2021-04-15 03:29:01,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:01,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:01,136 INFO L87 Difference]: Start difference. First operand 1268 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:01,741 INFO L93 Difference]: Finished difference Result 1578 states and 3896 transitions. [2021-04-15 03:29:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:01,743 INFO L225 Difference]: With dead ends: 1578 [2021-04-15 03:29:01,743 INFO L226 Difference]: Without dead ends: 1540 [2021-04-15 03:29:01,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 828.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-04-15 03:29:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1268. [2021-04-15 03:29:01,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1267 states have (on average 2.4822415153906867) internal successors, (3145), 1267 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 3145 transitions. [2021-04-15 03:29:01,755 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 3145 transitions. Word has length 30 [2021-04-15 03:29:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:01,755 INFO L480 AbstractCegarLoop]: Abstraction has 1268 states and 3145 transitions. [2021-04-15 03:29:01,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 3145 transitions. [2021-04-15 03:29:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:01,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:01,756 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:01,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-04-15 03:29:01,957 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:01,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:01,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1959804484, now seen corresponding path program 102 times [2021-04-15 03:29:01,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:01,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788080023] [2021-04-15 03:29:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788080023] [2021-04-15 03:29:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543285186] [2021-04-15 03:29:02,113 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 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 03:29:02,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:29:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:02,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:02,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:02,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632612050] [2021-04-15 03:29:02,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:02,414 INFO L87 Difference]: Start difference. First operand 1268 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:03,019 INFO L93 Difference]: Finished difference Result 1588 states and 3867 transitions. [2021-04-15 03:29:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:29:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:03,021 INFO L225 Difference]: With dead ends: 1588 [2021-04-15 03:29:03,021 INFO L226 Difference]: Without dead ends: 1530 [2021-04-15 03:29:03,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 723.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-04-15 03:29:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1340. [2021-04-15 03:29:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.48319641523525) internal successors, (3325), 1339 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3325 transitions. [2021-04-15 03:29:03,033 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3325 transitions. Word has length 30 [2021-04-15 03:29:03,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:03,033 INFO L480 AbstractCegarLoop]: Abstraction has 1340 states and 3325 transitions. [2021-04-15 03:29:03,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3325 transitions. [2021-04-15 03:29:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:03,034 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:03,034 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:03,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1236,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:03,237 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash -700666120, now seen corresponding path program 103 times [2021-04-15 03:29:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:03,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858250215] [2021-04-15 03:29:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:03,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858250215] [2021-04-15 03:29:03,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879530380] [2021-04-15 03:29:03,415 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 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 03:29:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:03,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:03,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705358886] [2021-04-15 03:29:03,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:03,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:03,738 INFO L87 Difference]: Start difference. First operand 1340 states and 3325 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:04,331 INFO L93 Difference]: Finished difference Result 1522 states and 3760 transitions. [2021-04-15 03:29:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:04,333 INFO L225 Difference]: With dead ends: 1522 [2021-04-15 03:29:04,333 INFO L226 Difference]: Without dead ends: 1484 [2021-04-15 03:29:04,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 731.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1202, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-04-15 03:29:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1340. [2021-04-15 03:29:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.48319641523525) internal successors, (3325), 1339 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3325 transitions. [2021-04-15 03:29:04,346 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3325 transitions. Word has length 30 [2021-04-15 03:29:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:04,346 INFO L480 AbstractCegarLoop]: Abstraction has 1340 states and 3325 transitions. [2021-04-15 03:29:04,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3325 transitions. [2021-04-15 03:29:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:04,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:04,347 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:04,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1253 [2021-04-15 03:29:04,548 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -512975820, now seen corresponding path program 104 times [2021-04-15 03:29:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:04,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81093106] [2021-04-15 03:29:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:04,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81093106] [2021-04-15 03:29:04,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278822419] [2021-04-15 03:29:04,726 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 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 03:29:04,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:05,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:05,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:05,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729273533] [2021-04-15 03:29:05,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:05,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:05,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:05,100 INFO L87 Difference]: Start difference. First operand 1340 states and 3325 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:06,091 INFO L93 Difference]: Finished difference Result 1730 states and 4240 transitions. [2021-04-15 03:29:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:29:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:06,093 INFO L225 Difference]: With dead ends: 1730 [2021-04-15 03:29:06,093 INFO L226 Difference]: Without dead ends: 1700 [2021-04-15 03:29:06,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1205.8ms TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:29:06,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-04-15 03:29:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1388. [2021-04-15 03:29:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.483777937995674) internal successors, (3445), 1387 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3445 transitions. [2021-04-15 03:29:06,106 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3445 transitions. Word has length 30 [2021-04-15 03:29:06,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:06,106 INFO L480 AbstractCegarLoop]: Abstraction has 1388 states and 3445 transitions. [2021-04-15 03:29:06,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3445 transitions. [2021-04-15 03:29:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:06,107 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:06,107 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:06,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-04-15 03:29:06,308 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1298402944, now seen corresponding path program 105 times [2021-04-15 03:29:06,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:06,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140492435] [2021-04-15 03:29:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140492435] [2021-04-15 03:29:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969475075] [2021-04-15 03:29:06,418 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 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 03:29:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:29:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:06,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:06,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:06,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586486775] [2021-04-15 03:29:06,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:06,719 INFO L87 Difference]: Start difference. First operand 1388 states and 3445 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:07,149 INFO L93 Difference]: Finished difference Result 1554 states and 3840 transitions. [2021-04-15 03:29:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:07,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:07,150 INFO L225 Difference]: With dead ends: 1554 [2021-04-15 03:29:07,150 INFO L226 Difference]: Without dead ends: 1524 [2021-04-15 03:29:07,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-04-15 03:29:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1396. [2021-04-15 03:29:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.4838709677419355) internal successors, (3465), 1395 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 3465 transitions. [2021-04-15 03:29:07,162 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 3465 transitions. Word has length 30 [2021-04-15 03:29:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:07,162 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 3465 transitions. [2021-04-15 03:29:07,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 3465 transitions. [2021-04-15 03:29:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:07,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:07,163 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:07,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-04-15 03:29:07,365 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 106 times [2021-04-15 03:29:07,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:07,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160310123] [2021-04-15 03:29:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:07,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160310123] [2021-04-15 03:29:07,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995128897] [2021-04-15 03:29:07,501 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 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 03:29:07,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:07,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:07,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:07,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:07,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204566658] [2021-04-15 03:29:07,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:07,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:07,820 INFO L87 Difference]: Start difference. First operand 1396 states and 3465 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:08,291 INFO L93 Difference]: Finished difference Result 1626 states and 4020 transitions. [2021-04-15 03:29:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:08,293 INFO L225 Difference]: With dead ends: 1626 [2021-04-15 03:29:08,293 INFO L226 Difference]: Without dead ends: 1596 [2021-04-15 03:29:08,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:08,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-04-15 03:29:08,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1404. [2021-04-15 03:29:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.4839629365645046) internal successors, (3485), 1403 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3485 transitions. [2021-04-15 03:29:08,306 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3485 transitions. Word has length 30 [2021-04-15 03:29:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:08,306 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 3485 transitions. [2021-04-15 03:29:08,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3485 transitions. [2021-04-15 03:29:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:08,308 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:08,308 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:08,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:08,509 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 107 times [2021-04-15 03:29:08,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:08,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228071147] [2021-04-15 03:29:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228071147] [2021-04-15 03:29:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487943312] [2021-04-15 03:29:08,611 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 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 03:29:08,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:29:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:08,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:08,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:08,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:08,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547082242] [2021-04-15 03:29:08,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:08,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:08,976 INFO L87 Difference]: Start difference. First operand 1404 states and 3485 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:09,546 INFO L93 Difference]: Finished difference Result 1704 states and 4175 transitions. [2021-04-15 03:29:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:09,548 INFO L225 Difference]: With dead ends: 1704 [2021-04-15 03:29:09,548 INFO L226 Difference]: Without dead ends: 1674 [2021-04-15 03:29:09,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 732.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-04-15 03:29:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1428. [2021-04-15 03:29:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.4842326559215135) internal successors, (3545), 1427 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3545 transitions. [2021-04-15 03:29:09,561 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3545 transitions. Word has length 30 [2021-04-15 03:29:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:09,561 INFO L480 AbstractCegarLoop]: Abstraction has 1428 states and 3545 transitions. [2021-04-15 03:29:09,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3545 transitions. [2021-04-15 03:29:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:09,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:09,562 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:09,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1315 [2021-04-15 03:29:09,763 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:09,763 INFO L82 PathProgramCache]: Analyzing trace with hash 941817276, now seen corresponding path program 108 times [2021-04-15 03:29:09,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:09,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186766888] [2021-04-15 03:29:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:09,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186766888] [2021-04-15 03:29:09,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674565519] [2021-04-15 03:29:09,887 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 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 03:29:09,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:29:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:09,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:10,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:10,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:10,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493117553] [2021-04-15 03:29:10,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:10,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:10,200 INFO L87 Difference]: Start difference. First operand 1428 states and 3545 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:10,835 INFO L93 Difference]: Finished difference Result 1554 states and 3844 transitions. [2021-04-15 03:29:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:10,838 INFO L225 Difference]: With dead ends: 1554 [2021-04-15 03:29:10,838 INFO L226 Difference]: Without dead ends: 1524 [2021-04-15 03:29:10,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 712.9ms TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-04-15 03:29:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1444. [2021-04-15 03:29:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 2.4844074844074844) internal successors, (3585), 1443 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 3585 transitions. [2021-04-15 03:29:10,850 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 3585 transitions. Word has length 30 [2021-04-15 03:29:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:10,850 INFO L480 AbstractCegarLoop]: Abstraction has 1444 states and 3585 transitions. [2021-04-15 03:29:10,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 3585 transitions. [2021-04-15 03:29:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:10,851 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:10,852 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:11,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:11,052 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 109 times [2021-04-15 03:29:11,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:11,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745729594] [2021-04-15 03:29:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745729594] [2021-04-15 03:29:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367216301] [2021-04-15 03:29:11,177 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 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 03:29:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:11,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:11,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:11,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:11,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690923534] [2021-04-15 03:29:11,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:11,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:11,585 INFO L87 Difference]: Start difference. First operand 1444 states and 3585 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:12,156 INFO L93 Difference]: Finished difference Result 1642 states and 4060 transitions. [2021-04-15 03:29:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:12,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:12,158 INFO L225 Difference]: With dead ends: 1642 [2021-04-15 03:29:12,158 INFO L226 Difference]: Without dead ends: 1612 [2021-04-15 03:29:12,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-04-15 03:29:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1428. [2021-04-15 03:29:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.4842326559215135) internal successors, (3545), 1427 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3545 transitions. [2021-04-15 03:29:12,172 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3545 transitions. Word has length 30 [2021-04-15 03:29:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:12,172 INFO L480 AbstractCegarLoop]: Abstraction has 1428 states and 3545 transitions. [2021-04-15 03:29:12,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3545 transitions. [2021-04-15 03:29:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:12,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:12,173 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:12,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:12,374 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash -731840580, now seen corresponding path program 110 times [2021-04-15 03:29:12,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:12,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618516894] [2021-04-15 03:29:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:12,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618516894] [2021-04-15 03:29:12,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396249308] [2021-04-15 03:29:12,489 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 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 03:29:12,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:12,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:12,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:12,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:12,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345365583] [2021-04-15 03:29:12,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:12,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:12,819 INFO L87 Difference]: Start difference. First operand 1428 states and 3545 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:13,498 INFO L93 Difference]: Finished difference Result 2046 states and 5012 transitions. [2021-04-15 03:29:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:29:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:13,500 INFO L225 Difference]: With dead ends: 2046 [2021-04-15 03:29:13,501 INFO L226 Difference]: Without dead ends: 1988 [2021-04-15 03:29:13,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 812.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-04-15 03:29:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1516. [2021-04-15 03:29:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 2.485148514851485) internal successors, (3765), 1515 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 3765 transitions. [2021-04-15 03:29:13,515 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 3765 transitions. Word has length 30 [2021-04-15 03:29:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:13,516 INFO L480 AbstractCegarLoop]: Abstraction has 1516 states and 3765 transitions. [2021-04-15 03:29:13,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 3765 transitions. [2021-04-15 03:29:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:13,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:13,517 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:13,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1368,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:13,719 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:13,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:13,719 INFO L82 PathProgramCache]: Analyzing trace with hash 830033784, now seen corresponding path program 111 times [2021-04-15 03:29:13,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:13,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814372124] [2021-04-15 03:29:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814372124] [2021-04-15 03:29:13,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232939925] [2021-04-15 03:29:13,862 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 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 03:29:13,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:29:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:14,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:14,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:14,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017915178] [2021-04-15 03:29:14,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:14,252 INFO L87 Difference]: Start difference. First operand 1516 states and 3765 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:14,891 INFO L93 Difference]: Finished difference Result 1842 states and 4560 transitions. [2021-04-15 03:29:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:14,893 INFO L225 Difference]: With dead ends: 1842 [2021-04-15 03:29:14,893 INFO L226 Difference]: Without dead ends: 1812 [2021-04-15 03:29:14,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 869.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-04-15 03:29:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1524. [2021-04-15 03:29:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 2.485226526592252) internal successors, (3785), 1523 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 3785 transitions. [2021-04-15 03:29:14,911 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 3785 transitions. Word has length 30 [2021-04-15 03:29:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:14,911 INFO L480 AbstractCegarLoop]: Abstraction has 1524 states and 3785 transitions. [2021-04-15 03:29:14,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 3785 transitions. [2021-04-15 03:29:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:14,913 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:14,913 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:15,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1382,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:15,136 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1429007880, now seen corresponding path program 112 times [2021-04-15 03:29:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:15,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320710383] [2021-04-15 03:29:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320710383] [2021-04-15 03:29:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856991444] [2021-04-15 03:29:15,277 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 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 03:29:15,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:15,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:15,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:15,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:15,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:15,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989247198] [2021-04-15 03:29:15,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:15,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:15,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:15,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:15,586 INFO L87 Difference]: Start difference. First operand 1524 states and 3785 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:16,127 INFO L93 Difference]: Finished difference Result 1844 states and 4502 transitions. [2021-04-15 03:29:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:29:16,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:16,129 INFO L225 Difference]: With dead ends: 1844 [2021-04-15 03:29:16,129 INFO L226 Difference]: Without dead ends: 1806 [2021-04-15 03:29:16,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:29:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-04-15 03:29:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1548. [2021-04-15 03:29:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 2.4880413703943116) internal successors, (3849), 1547 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3849 transitions. [2021-04-15 03:29:16,144 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3849 transitions. Word has length 30 [2021-04-15 03:29:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:16,144 INFO L480 AbstractCegarLoop]: Abstraction has 1548 states and 3849 transitions. [2021-04-15 03:29:16,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3849 transitions. [2021-04-15 03:29:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:16,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:16,146 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:16,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1403 [2021-04-15 03:29:16,346 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash 17820784, now seen corresponding path program 113 times [2021-04-15 03:29:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:16,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864575014] [2021-04-15 03:29:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:16,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864575014] [2021-04-15 03:29:16,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876654882] [2021-04-15 03:29:16,491 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 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 03:29:16,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:29:16,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:16,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:16,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:16,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:16,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823673925] [2021-04-15 03:29:16,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:16,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:16,787 INFO L87 Difference]: Start difference. First operand 1548 states and 3849 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:17,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:17,208 INFO L93 Difference]: Finished difference Result 1674 states and 4140 transitions. [2021-04-15 03:29:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:29:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:17,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:17,210 INFO L225 Difference]: With dead ends: 1674 [2021-04-15 03:29:17,210 INFO L226 Difference]: Without dead ends: 1644 [2021-04-15 03:29:17,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:29:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-04-15 03:29:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1540. [2021-04-15 03:29:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.4853801169590644) internal successors, (3825), 1539 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3825 transitions. [2021-04-15 03:29:17,223 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3825 transitions. Word has length 30 [2021-04-15 03:29:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:17,223 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3825 transitions. [2021-04-15 03:29:17,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3825 transitions. [2021-04-15 03:29:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:17,224 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:17,224 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:17,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:17,425 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2086236928, now seen corresponding path program 114 times [2021-04-15 03:29:17,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:17,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703373998] [2021-04-15 03:29:17,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:17,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703373998] [2021-04-15 03:29:17,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683868276] [2021-04-15 03:29:17,619 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 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 03:29:17,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:29:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:17,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:17,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:17,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229448581] [2021-04-15 03:29:17,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:17,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:17,993 INFO L87 Difference]: Start difference. First operand 1540 states and 3825 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:18,575 INFO L93 Difference]: Finished difference Result 1674 states and 4140 transitions. [2021-04-15 03:29:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:18,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:18,576 INFO L225 Difference]: With dead ends: 1674 [2021-04-15 03:29:18,576 INFO L226 Difference]: Without dead ends: 1644 [2021-04-15 03:29:18,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-04-15 03:29:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1532. [2021-04-15 03:29:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 2.4853037230568256) internal successors, (3805), 1531 states have internal predecessors, (3805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 3805 transitions. [2021-04-15 03:29:18,588 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 3805 transitions. Word has length 30 [2021-04-15 03:29:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:18,588 INFO L480 AbstractCegarLoop]: Abstraction has 1532 states and 3805 transitions. [2021-04-15 03:29:18,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 3805 transitions. [2021-04-15 03:29:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:18,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:18,590 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:18,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1432,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:18,805 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash 149528764, now seen corresponding path program 115 times [2021-04-15 03:29:18,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:18,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787987741] [2021-04-15 03:29:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787987741] [2021-04-15 03:29:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249998244] [2021-04-15 03:29:18,962 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 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 03:29:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:19,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:19,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:19,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844643014] [2021-04-15 03:29:19,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:19,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:19,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:19,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:19,306 INFO L87 Difference]: Start difference. First operand 1532 states and 3805 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:20,002 INFO L93 Difference]: Finished difference Result 1738 states and 4300 transitions. [2021-04-15 03:29:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:20,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:20,004 INFO L225 Difference]: With dead ends: 1738 [2021-04-15 03:29:20,005 INFO L226 Difference]: Without dead ends: 1708 [2021-04-15 03:29:20,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2021-04-15 03:29:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1548. [2021-04-15 03:29:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1547 states have (on average 2.4854557207498384) internal successors, (3845), 1547 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 3845 transitions. [2021-04-15 03:29:20,018 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 3845 transitions. Word has length 30 [2021-04-15 03:29:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:20,018 INFO L480 AbstractCegarLoop]: Abstraction has 1548 states and 3845 transitions. [2021-04-15 03:29:20,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 3845 transitions. [2021-04-15 03:29:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:20,019 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:20,019 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:20,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1444 [2021-04-15 03:29:20,220 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 116 times [2021-04-15 03:29:20,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:20,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580466877] [2021-04-15 03:29:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:20,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580466877] [2021-04-15 03:29:20,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473659430] [2021-04-15 03:29:20,346 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 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 03:29:20,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:20,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:20,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84397028] [2021-04-15 03:29:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:20,691 INFO L87 Difference]: Start difference. First operand 1548 states and 3845 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:21,317 INFO L93 Difference]: Finished difference Result 1906 states and 4716 transitions. [2021-04-15 03:29:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:21,320 INFO L225 Difference]: With dead ends: 1906 [2021-04-15 03:29:21,320 INFO L226 Difference]: Without dead ends: 1868 [2021-04-15 03:29:21,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 810.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:29:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-04-15 03:29:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1540. [2021-04-15 03:29:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.4853801169590644) internal successors, (3825), 1539 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3825 transitions. [2021-04-15 03:29:21,334 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3825 transitions. Word has length 30 [2021-04-15 03:29:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:21,334 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3825 transitions. [2021-04-15 03:29:21,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:21,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3825 transitions. [2021-04-15 03:29:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:21,335 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:21,335 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:21,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1465,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:21,536 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:21,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1308421768, now seen corresponding path program 117 times [2021-04-15 03:29:21,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:21,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834508859] [2021-04-15 03:29:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:21,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834508859] [2021-04-15 03:29:21,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184977558] [2021-04-15 03:29:21,822 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 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 03:29:21,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:29:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:22,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:22,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949073870] [2021-04-15 03:29:22,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:22,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:22,218 INFO L87 Difference]: Start difference. First operand 1540 states and 3825 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:22,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:22,854 INFO L93 Difference]: Finished difference Result 1908 states and 4675 transitions. [2021-04-15 03:29:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:22,856 INFO L225 Difference]: With dead ends: 1908 [2021-04-15 03:29:22,856 INFO L226 Difference]: Without dead ends: 1866 [2021-04-15 03:29:22,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 986.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-04-15 03:29:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1564. [2021-04-15 03:29:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.4856046065259116) internal successors, (3885), 1563 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 3885 transitions. [2021-04-15 03:29:22,877 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 3885 transitions. Word has length 30 [2021-04-15 03:29:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:22,877 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 3885 transitions. [2021-04-15 03:29:22,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 3885 transitions. [2021-04-15 03:29:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:22,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:22,880 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:23,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-04-15 03:29:23,103 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 118 times [2021-04-15 03:29:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:23,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107382816] [2021-04-15 03:29:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107382816] [2021-04-15 03:29:23,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233823176] [2021-04-15 03:29:23,317 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 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 03:29:23,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:23,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742970514] [2021-04-15 03:29:23,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:23,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:23,652 INFO L87 Difference]: Start difference. First operand 1564 states and 3885 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:24,132 INFO L93 Difference]: Finished difference Result 1900 states and 4651 transitions. [2021-04-15 03:29:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:24,135 INFO L225 Difference]: With dead ends: 1900 [2021-04-15 03:29:24,135 INFO L226 Difference]: Without dead ends: 1850 [2021-04-15 03:29:24,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:29:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2021-04-15 03:29:24,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1604. [2021-04-15 03:29:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 2.4859638178415473) internal successors, (3985), 1603 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 3985 transitions. [2021-04-15 03:29:24,149 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 3985 transitions. Word has length 30 [2021-04-15 03:29:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:24,149 INFO L480 AbstractCegarLoop]: Abstraction has 1604 states and 3985 transitions. [2021-04-15 03:29:24,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 3985 transitions. [2021-04-15 03:29:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:24,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:24,151 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:24,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-04-15 03:29:24,352 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash 917438260, now seen corresponding path program 119 times [2021-04-15 03:29:24,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:24,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640671358] [2021-04-15 03:29:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:24,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640671358] [2021-04-15 03:29:24,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488620949] [2021-04-15 03:29:24,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:29:24,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:29:24,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:24,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:24,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622281864] [2021-04-15 03:29:24,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:24,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:24,868 INFO L87 Difference]: Start difference. First operand 1604 states and 3985 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:25,353 INFO L93 Difference]: Finished difference Result 1898 states and 4704 transitions. [2021-04-15 03:29:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:25,360 INFO L225 Difference]: With dead ends: 1898 [2021-04-15 03:29:25,360 INFO L226 Difference]: Without dead ends: 1868 [2021-04-15 03:29:25,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-04-15 03:29:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1620. [2021-04-15 03:29:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 2.486102532427424) internal successors, (4025), 1619 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 4025 transitions. [2021-04-15 03:29:25,376 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 4025 transitions. Word has length 30 [2021-04-15 03:29:25,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:25,376 INFO L480 AbstractCegarLoop]: Abstraction has 1620 states and 4025 transitions. [2021-04-15 03:29:25,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 4025 transitions. [2021-04-15 03:29:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:25,378 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:25,378 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:25,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1515 [2021-04-15 03:29:25,580 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:25,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 120 times [2021-04-15 03:29:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:25,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389876768] [2021-04-15 03:29:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389876768] [2021-04-15 03:29:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142768992] [2021-04-15 03:29:25,676 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:29:25,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:29:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:25,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:26,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:26,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085497836] [2021-04-15 03:29:26,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:26,010 INFO L87 Difference]: Start difference. First operand 1620 states and 4025 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:26,560 INFO L93 Difference]: Finished difference Result 1866 states and 4616 transitions. [2021-04-15 03:29:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:29:26,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:26,562 INFO L225 Difference]: With dead ends: 1866 [2021-04-15 03:29:26,562 INFO L226 Difference]: Without dead ends: 1828 [2021-04-15 03:29:26,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:29:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-04-15 03:29:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1620. [2021-04-15 03:29:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 2.486102532427424) internal successors, (4025), 1619 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 4025 transitions. [2021-04-15 03:29:26,581 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 4025 transitions. Word has length 30 [2021-04-15 03:29:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:26,581 INFO L480 AbstractCegarLoop]: Abstraction has 1620 states and 4025 transitions. [2021-04-15 03:29:26,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 4025 transitions. [2021-04-15 03:29:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:26,583 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:26,583 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:26,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1537,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:26,807 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:26,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2075915000, now seen corresponding path program 121 times [2021-04-15 03:29:26,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:26,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408109223] [2021-04-15 03:29:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408109223] [2021-04-15 03:29:26,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156451961] [2021-04-15 03:29:26,892 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 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 03:29:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:26,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:26,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:27,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406299019] [2021-04-15 03:29:27,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:27,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:27,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:27,195 INFO L87 Difference]: Start difference. First operand 1620 states and 4025 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:27,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:27,846 INFO L93 Difference]: Finished difference Result 1874 states and 4636 transitions. [2021-04-15 03:29:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:29:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:27,848 INFO L225 Difference]: With dead ends: 1874 [2021-04-15 03:29:27,848 INFO L226 Difference]: Without dead ends: 1836 [2021-04-15 03:29:27,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 716.6ms TimeCoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:29:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1836 states. [2021-04-15 03:29:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1836 to 1628. [2021-04-15 03:29:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.4861708666256916) internal successors, (4045), 1627 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 4045 transitions. [2021-04-15 03:29:27,868 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 4045 transitions. Word has length 30 [2021-04-15 03:29:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:27,868 INFO L480 AbstractCegarLoop]: Abstraction has 1628 states and 4045 transitions. [2021-04-15 03:29:27,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 4045 transitions. [2021-04-15 03:29:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:27,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:27,870 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:28,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1555 [2021-04-15 03:29:28,092 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 798528504, now seen corresponding path program 122 times [2021-04-15 03:29:28,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:28,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416515511] [2021-04-15 03:29:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416515511] [2021-04-15 03:29:28,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071078559] [2021-04-15 03:29:28,221 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 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 03:29:28,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:28,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:28,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:28,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:28,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983576535] [2021-04-15 03:29:28,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:28,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:28,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:28,612 INFO L87 Difference]: Start difference. First operand 1628 states and 4045 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:29,207 INFO L93 Difference]: Finished difference Result 1826 states and 4520 transitions. [2021-04-15 03:29:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:29,209 INFO L225 Difference]: With dead ends: 1826 [2021-04-15 03:29:29,210 INFO L226 Difference]: Without dead ends: 1796 [2021-04-15 03:29:29,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 781.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-04-15 03:29:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1636. [2021-04-15 03:29:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.4862385321100917) internal successors, (4065), 1635 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 4065 transitions. [2021-04-15 03:29:29,224 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 4065 transitions. Word has length 30 [2021-04-15 03:29:29,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:29,224 INFO L480 AbstractCegarLoop]: Abstraction has 1636 states and 4065 transitions. [2021-04-15 03:29:29,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 4065 transitions. [2021-04-15 03:29:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:29,225 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:29,225 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:29,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1567 [2021-04-15 03:29:29,426 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:29,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash 2057666868, now seen corresponding path program 123 times [2021-04-15 03:29:29,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:29,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231834968] [2021-04-15 03:29:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231834968] [2021-04-15 03:29:29,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830245187] [2021-04-15 03:29:29,552 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 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 03:29:29,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:29:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:29,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:29,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:29,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:29,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284649288] [2021-04-15 03:29:29,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:29,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:29,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:29,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:29,839 INFO L87 Difference]: Start difference. First operand 1636 states and 4065 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:30,211 INFO L93 Difference]: Finished difference Result 1842 states and 4560 transitions. [2021-04-15 03:29:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:29:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:30,213 INFO L225 Difference]: With dead ends: 1842 [2021-04-15 03:29:30,214 INFO L226 Difference]: Without dead ends: 1812 [2021-04-15 03:29:30,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:29:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-04-15 03:29:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1644. [2021-04-15 03:29:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.4863055386488133) internal successors, (4085), 1643 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4085 transitions. [2021-04-15 03:29:30,230 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4085 transitions. Word has length 30 [2021-04-15 03:29:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:30,230 INFO L480 AbstractCegarLoop]: Abstraction has 1644 states and 4085 transitions. [2021-04-15 03:29:30,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4085 transitions. [2021-04-15 03:29:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:29:30,231 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:30,231 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:30,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:30,440 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 124 times [2021-04-15 03:29:30,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:30,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362411074] [2021-04-15 03:29:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:30,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362411074] [2021-04-15 03:29:30,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870546024] [2021-04-15 03:29:30,572 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 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 03:29:30,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:30,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:30,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:29:30,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:30,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:30,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-04-15 03:29:30,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547326244] [2021-04-15 03:29:30,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:29:30,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:30,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:29:30,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:30,895 INFO L87 Difference]: Start difference. First operand 1644 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:31,504 INFO L93 Difference]: Finished difference Result 2070 states and 5080 transitions. [2021-04-15 03:29:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:29:31,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:29:31,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:31,507 INFO L225 Difference]: With dead ends: 2070 [2021-04-15 03:29:31,507 INFO L226 Difference]: Without dead ends: 2028 [2021-04-15 03:29:31,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 778.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1148, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-04-15 03:29:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1692. [2021-04-15 03:29:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 2.4866942637492606) internal successors, (4205), 1691 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 4205 transitions. [2021-04-15 03:29:31,522 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 4205 transitions. Word has length 30 [2021-04-15 03:29:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:31,523 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 4205 transitions. [2021-04-15 03:29:31,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 4205 transitions. [2021-04-15 03:29:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:31,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:31,524 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:31,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:31,725 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash -236454266, now seen corresponding path program 125 times [2021-04-15 03:29:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:31,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99489703] [2021-04-15 03:29:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:31,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99489703] [2021-04-15 03:29:31,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134161250] [2021-04-15 03:29:31,946 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 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 03:29:31,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:29:31,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:31,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:32,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:32,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:32,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294377385] [2021-04-15 03:29:32,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:32,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:32,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:32,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:32,312 INFO L87 Difference]: Start difference. First operand 1692 states and 4205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:32,822 INFO L93 Difference]: Finished difference Result 1834 states and 4540 transitions. [2021-04-15 03:29:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:32,822 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:32,824 INFO L225 Difference]: With dead ends: 1834 [2021-04-15 03:29:32,824 INFO L226 Difference]: Without dead ends: 1804 [2021-04-15 03:29:32,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:29:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-04-15 03:29:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1692. [2021-04-15 03:29:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 2.4866942637492606) internal successors, (4205), 1691 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 4205 transitions. [2021-04-15 03:29:32,843 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 4205 transitions. Word has length 32 [2021-04-15 03:29:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:32,843 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 4205 transitions. [2021-04-15 03:29:32,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 4205 transitions. [2021-04-15 03:29:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:32,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:32,845 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:33,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1611 [2021-04-15 03:29:33,069 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash 574017866, now seen corresponding path program 126 times [2021-04-15 03:29:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:33,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113455062] [2021-04-15 03:29:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:33,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113455062] [2021-04-15 03:29:33,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327217599] [2021-04-15 03:29:33,258 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 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 03:29:33,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:29:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:33,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:33,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:33,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:33,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943714105] [2021-04-15 03:29:33,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:33,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:33,597 INFO L87 Difference]: Start difference. First operand 1692 states and 4205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:34,195 INFO L93 Difference]: Finished difference Result 1866 states and 4616 transitions. [2021-04-15 03:29:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:29:34,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:34,197 INFO L225 Difference]: With dead ends: 1866 [2021-04-15 03:29:34,197 INFO L226 Difference]: Without dead ends: 1828 [2021-04-15 03:29:34,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:29:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-04-15 03:29:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1700. [2021-04-15 03:29:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-04-15 03:29:34,219 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-04-15 03:29:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:34,219 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-04-15 03:29:34,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-04-15 03:29:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:34,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:34,221 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:34,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1626 [2021-04-15 03:29:34,422 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 127 times [2021-04-15 03:29:34,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:34,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280339536] [2021-04-15 03:29:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:34,802 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2021-04-15 03:29:35,001 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-04-15 03:29:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280339536] [2021-04-15 03:29:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170185824] [2021-04-15 03:29:35,141 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 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 03:29:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:35,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:35,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259809290] [2021-04-15 03:29:35,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:35,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:35,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:35,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:35,554 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:36,220 INFO L93 Difference]: Finished difference Result 1914 states and 4740 transitions. [2021-04-15 03:29:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:36,222 INFO L225 Difference]: With dead ends: 1914 [2021-04-15 03:29:36,222 INFO L226 Difference]: Without dead ends: 1884 [2021-04-15 03:29:36,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1087.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-04-15 03:29:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1700. [2021-04-15 03:29:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-04-15 03:29:36,237 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-04-15 03:29:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:36,237 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-04-15 03:29:36,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-04-15 03:29:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:36,239 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:36,240 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:36,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1640 [2021-04-15 03:29:36,461 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 128 times [2021-04-15 03:29:36,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740918094] [2021-04-15 03:29:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:36,670 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2021-04-15 03:29:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:36,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740918094] [2021-04-15 03:29:36,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582858176] [2021-04-15 03:29:36,943 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 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 03:29:36,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:36,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:37,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:37,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:37,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482229524] [2021-04-15 03:29:37,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:37,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:37,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:37,329 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:38,170 INFO L93 Difference]: Finished difference Result 1922 states and 4760 transitions. [2021-04-15 03:29:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:29:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:38,172 INFO L225 Difference]: With dead ends: 1922 [2021-04-15 03:29:38,172 INFO L226 Difference]: Without dead ends: 1892 [2021-04-15 03:29:38,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:29:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-04-15 03:29:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1708. [2021-04-15 03:29:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.4868189806678385) internal successors, (4245), 1707 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4245 transitions. [2021-04-15 03:29:38,188 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4245 transitions. Word has length 32 [2021-04-15 03:29:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:38,188 INFO L480 AbstractCegarLoop]: Abstraction has 1708 states and 4245 transitions. [2021-04-15 03:29:38,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4245 transitions. [2021-04-15 03:29:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:38,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:38,190 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:38,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1653,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:38,390 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1971157630, now seen corresponding path program 129 times [2021-04-15 03:29:38,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:38,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875381383] [2021-04-15 03:29:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:38,701 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 11 [2021-04-15 03:29:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:39,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875381383] [2021-04-15 03:29:39,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971826813] [2021-04-15 03:29:39,029 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 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 03:29:39,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:29:39,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:39,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:39,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:39,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908573585] [2021-04-15 03:29:39,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:39,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:39,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:39,431 INFO L87 Difference]: Start difference. First operand 1708 states and 4245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:39,963 INFO L93 Difference]: Finished difference Result 1810 states and 4484 transitions. [2021-04-15 03:29:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:39,965 INFO L225 Difference]: With dead ends: 1810 [2021-04-15 03:29:39,966 INFO L226 Difference]: Without dead ends: 1788 [2021-04-15 03:29:39,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 809.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1254, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:29:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-04-15 03:29:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1700. [2021-04-15 03:29:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.4867569158328426) internal successors, (4225), 1699 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4225 transitions. [2021-04-15 03:29:39,980 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4225 transitions. Word has length 32 [2021-04-15 03:29:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:39,980 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4225 transitions. [2021-04-15 03:29:39,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4225 transitions. [2021-04-15 03:29:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:39,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:39,982 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:40,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-04-15 03:29:40,182 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 130 times [2021-04-15 03:29:40,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:40,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580900215] [2021-04-15 03:29:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580900215] [2021-04-15 03:29:40,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470614127] [2021-04-15 03:29:40,529 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 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 03:29:40,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:40,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:40,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:40,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725917558] [2021-04-15 03:29:40,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:40,902 INFO L87 Difference]: Start difference. First operand 1700 states and 4225 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:41,391 INFO L93 Difference]: Finished difference Result 1818 states and 4500 transitions. [2021-04-15 03:29:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:41,394 INFO L225 Difference]: With dead ends: 1818 [2021-04-15 03:29:41,394 INFO L226 Difference]: Without dead ends: 1788 [2021-04-15 03:29:41,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:29:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-04-15 03:29:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1716. [2021-04-15 03:29:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.486880466472303) internal successors, (4265), 1715 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4265 transitions. [2021-04-15 03:29:41,408 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4265 transitions. Word has length 32 [2021-04-15 03:29:41,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:41,408 INFO L480 AbstractCegarLoop]: Abstraction has 1716 states and 4265 transitions. [2021-04-15 03:29:41,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4265 transitions. [2021-04-15 03:29:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:41,410 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:41,410 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:41,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-04-15 03:29:41,610 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:41,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 131 times [2021-04-15 03:29:41,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:41,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840994639] [2021-04-15 03:29:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:42,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840994639] [2021-04-15 03:29:42,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975681111] [2021-04-15 03:29:42,090 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 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 03:29:42,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:29:42,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:42,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:42,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353760082] [2021-04-15 03:29:42,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:42,442 INFO L87 Difference]: Start difference. First operand 1716 states and 4265 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:43,089 INFO L93 Difference]: Finished difference Result 2058 states and 5100 transitions. [2021-04-15 03:29:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:29:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:43,092 INFO L225 Difference]: With dead ends: 2058 [2021-04-15 03:29:43,092 INFO L226 Difference]: Without dead ends: 2020 [2021-04-15 03:29:43,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:29:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-04-15 03:29:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1724. [2021-04-15 03:29:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 2.4869413813116656) internal successors, (4285), 1723 states have internal predecessors, (4285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4285 transitions. [2021-04-15 03:29:43,108 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4285 transitions. Word has length 32 [2021-04-15 03:29:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:43,108 INFO L480 AbstractCegarLoop]: Abstraction has 1724 states and 4285 transitions. [2021-04-15 03:29:43,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:43,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4285 transitions. [2021-04-15 03:29:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:43,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:43,110 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:43,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:43,311 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:43,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 132 times [2021-04-15 03:29:43,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:43,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394693418] [2021-04-15 03:29:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:43,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394693418] [2021-04-15 03:29:43,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507433660] [2021-04-15 03:29:43,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:29:43,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:29:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:44,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:44,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:44,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198278245] [2021-04-15 03:29:44,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:44,225 INFO L87 Difference]: Start difference. First operand 1724 states and 4285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:44,925 INFO L93 Difference]: Finished difference Result 1970 states and 4880 transitions. [2021-04-15 03:29:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:44,928 INFO L225 Difference]: With dead ends: 1970 [2021-04-15 03:29:44,928 INFO L226 Difference]: Without dead ends: 1940 [2021-04-15 03:29:44,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1204.8ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:29:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-04-15 03:29:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1732. [2021-04-15 03:29:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.487001733102253) internal successors, (4305), 1731 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4305 transitions. [2021-04-15 03:29:44,942 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4305 transitions. Word has length 32 [2021-04-15 03:29:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:44,942 INFO L480 AbstractCegarLoop]: Abstraction has 1732 states and 4305 transitions. [2021-04-15 03:29:44,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:44,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4305 transitions. [2021-04-15 03:29:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:44,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:44,944 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:45,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-04-15 03:29:45,144 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:45,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 133 times [2021-04-15 03:29:45,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:45,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458939338] [2021-04-15 03:29:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:45,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458939338] [2021-04-15 03:29:45,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816653007] [2021-04-15 03:29:45,409 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 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 03:29:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:45,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:45,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443302987] [2021-04-15 03:29:45,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:45,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:45,888 INFO L87 Difference]: Start difference. First operand 1732 states and 4305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:46,426 INFO L93 Difference]: Finished difference Result 1938 states and 4804 transitions. [2021-04-15 03:29:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:46,428 INFO L225 Difference]: With dead ends: 1938 [2021-04-15 03:29:46,428 INFO L226 Difference]: Without dead ends: 1916 [2021-04-15 03:29:46,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 946.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-04-15 03:29:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1732. [2021-04-15 03:29:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1731 states have (on average 2.487001733102253) internal successors, (4305), 1731 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 4305 transitions. [2021-04-15 03:29:46,443 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 4305 transitions. Word has length 32 [2021-04-15 03:29:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:46,443 INFO L480 AbstractCegarLoop]: Abstraction has 1732 states and 4305 transitions. [2021-04-15 03:29:46,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 4305 transitions. [2021-04-15 03:29:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:46,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:46,445 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:46,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1735,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:46,648 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 134 times [2021-04-15 03:29:46,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:46,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474292753] [2021-04-15 03:29:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:46,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474292753] [2021-04-15 03:29:46,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228217628] [2021-04-15 03:29:46,852 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 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 03:29:46,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:46,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:47,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:47,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122234467] [2021-04-15 03:29:47,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:47,356 INFO L87 Difference]: Start difference. First operand 1732 states and 4305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:48,368 INFO L93 Difference]: Finished difference Result 1954 states and 4840 transitions. [2021-04-15 03:29:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:29:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:48,371 INFO L225 Difference]: With dead ends: 1954 [2021-04-15 03:29:48,371 INFO L226 Difference]: Without dead ends: 1924 [2021-04-15 03:29:48,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1326.6ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:29:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-04-15 03:29:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1756. [2021-04-15 03:29:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.4871794871794872) internal successors, (4365), 1755 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4365 transitions. [2021-04-15 03:29:48,386 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4365 transitions. Word has length 32 [2021-04-15 03:29:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:48,386 INFO L480 AbstractCegarLoop]: Abstraction has 1756 states and 4365 transitions. [2021-04-15 03:29:48,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4365 transitions. [2021-04-15 03:29:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:48,388 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:48,388 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:48,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-04-15 03:29:48,591 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:48,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 135 times [2021-04-15 03:29:48,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:48,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111328957] [2021-04-15 03:29:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111328957] [2021-04-15 03:29:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343180282] [2021-04-15 03:29:48,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:29:48,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:29:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:49,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:49,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:49,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993890539] [2021-04-15 03:29:49,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:49,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:49,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:49,303 INFO L87 Difference]: Start difference. First operand 1756 states and 4365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:49,556 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-04-15 03:29:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:50,191 INFO L93 Difference]: Finished difference Result 1906 states and 4724 transitions. [2021-04-15 03:29:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:50,194 INFO L225 Difference]: With dead ends: 1906 [2021-04-15 03:29:50,194 INFO L226 Difference]: Without dead ends: 1884 [2021-04-15 03:29:50,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1258.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-04-15 03:29:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1756. [2021-04-15 03:29:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.4871794871794872) internal successors, (4365), 1755 states have internal predecessors, (4365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4365 transitions. [2021-04-15 03:29:50,213 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4365 transitions. Word has length 32 [2021-04-15 03:29:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:50,213 INFO L480 AbstractCegarLoop]: Abstraction has 1756 states and 4365 transitions. [2021-04-15 03:29:50,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4365 transitions. [2021-04-15 03:29:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:50,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:50,215 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:50,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-04-15 03:29:50,416 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:50,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1592943234, now seen corresponding path program 136 times [2021-04-15 03:29:50,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:50,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140999698] [2021-04-15 03:29:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:50,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140999698] [2021-04-15 03:29:50,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367309612] [2021-04-15 03:29:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:29:50,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:51,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:51,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:51,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632913199] [2021-04-15 03:29:51,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:51,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:51,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:51,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:51,015 INFO L87 Difference]: Start difference. First operand 1756 states and 4365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:51,659 INFO L93 Difference]: Finished difference Result 1938 states and 4796 transitions. [2021-04-15 03:29:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:51,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:51,662 INFO L225 Difference]: With dead ends: 1938 [2021-04-15 03:29:51,662 INFO L226 Difference]: Without dead ends: 1900 [2021-04-15 03:29:51,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-04-15 03:29:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1780. [2021-04-15 03:29:51,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.4873524451939293) internal successors, (4425), 1779 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 4425 transitions. [2021-04-15 03:29:51,679 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 4425 transitions. Word has length 32 [2021-04-15 03:29:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:51,679 INFO L480 AbstractCegarLoop]: Abstraction has 1780 states and 4425 transitions. [2021-04-15 03:29:51,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 4425 transitions. [2021-04-15 03:29:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:51,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:51,681 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:51,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1799 [2021-04-15 03:29:51,881 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 137 times [2021-04-15 03:29:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:51,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820879357] [2021-04-15 03:29:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:52,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820879357] [2021-04-15 03:29:52,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442045664] [2021-04-15 03:29:52,105 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:29:52,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:29:52,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:52,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:52,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:52,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324681403] [2021-04-15 03:29:52,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:52,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:52,594 INFO L87 Difference]: Start difference. First operand 1780 states and 4425 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:53,437 INFO L93 Difference]: Finished difference Result 2002 states and 4952 transitions. [2021-04-15 03:29:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:29:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:53,440 INFO L225 Difference]: With dead ends: 2002 [2021-04-15 03:29:53,440 INFO L226 Difference]: Without dead ends: 1956 [2021-04-15 03:29:53,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1203.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:29:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-04-15 03:29:53,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1788. [2021-04-15 03:29:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.4874090654728596) internal successors, (4445), 1787 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 4445 transitions. [2021-04-15 03:29:53,456 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 4445 transitions. Word has length 32 [2021-04-15 03:29:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:53,456 INFO L480 AbstractCegarLoop]: Abstraction has 1788 states and 4445 transitions. [2021-04-15 03:29:53,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 4445 transitions. [2021-04-15 03:29:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:53,458 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:53,458 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:53,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:53,658 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 138 times [2021-04-15 03:29:53,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:53,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461139983] [2021-04-15 03:29:53,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:54,570 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-04-15 03:29:55,295 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-04-15 03:29:55,854 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-04-15 03:29:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:55,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461139983] [2021-04-15 03:29:55,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663965374] [2021-04-15 03:29:55,938 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 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 03:29:55,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:29:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:29:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:56,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:56,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692730397] [2021-04-15 03:29:56,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:56,454 INFO L87 Difference]: Start difference. First operand 1788 states and 4445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:57,371 INFO L93 Difference]: Finished difference Result 2114 states and 5240 transitions. [2021-04-15 03:29:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:57,374 INFO L225 Difference]: With dead ends: 2114 [2021-04-15 03:29:57,374 INFO L226 Difference]: Without dead ends: 2084 [2021-04-15 03:29:57,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1362.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:29:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-04-15 03:29:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1820. [2021-04-15 03:29:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 2.4876305662451896) internal successors, (4525), 1819 states have internal predecessors, (4525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 4525 transitions. [2021-04-15 03:29:57,391 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 4525 transitions. Word has length 32 [2021-04-15 03:29:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:57,391 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 4525 transitions. [2021-04-15 03:29:57,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 4525 transitions. [2021-04-15 03:29:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:57,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:57,393 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:57,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:57,608 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -31276282, now seen corresponding path program 139 times [2021-04-15 03:29:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:57,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917982453] [2021-04-15 03:29:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:58,027 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 6 [2021-04-15 03:29:58,167 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 21 [2021-04-15 03:29:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917982453] [2021-04-15 03:29:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031858037] [2021-04-15 03:29:58,276 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 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 03:29:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:58,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:58,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:58,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:29:58,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994920523] [2021-04-15 03:29:58,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:29:58,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:29:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:58,608 INFO L87 Difference]: Start difference. First operand 1820 states and 4525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:59,643 INFO L93 Difference]: Finished difference Result 2026 states and 5020 transitions. [2021-04-15 03:29:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:29:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:29:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:59,645 INFO L225 Difference]: With dead ends: 2026 [2021-04-15 03:29:59,645 INFO L226 Difference]: Without dead ends: 1996 [2021-04-15 03:29:59,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1236.3ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 03:29:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-04-15 03:29:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1852. [2021-04-15 03:29:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.487844408427877) internal successors, (4605), 1851 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4605 transitions. [2021-04-15 03:29:59,660 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4605 transitions. Word has length 32 [2021-04-15 03:29:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:59,660 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 4605 transitions. [2021-04-15 03:29:59,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4605 transitions. [2021-04-15 03:29:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:29:59,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:59,662 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:59,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:59,862 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1329892926, now seen corresponding path program 140 times [2021-04-15 03:29:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:59,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750424562] [2021-04-15 03:29:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:00,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750424562] [2021-04-15 03:30:00,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883592666] [2021-04-15 03:30:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:00,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:00,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:00,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:00,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:00,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333897951] [2021-04-15 03:30:00,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:00,663 INFO L87 Difference]: Start difference. First operand 1852 states and 4605 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:01,044 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-04-15 03:30:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:01,406 INFO L93 Difference]: Finished difference Result 2010 states and 4984 transitions. [2021-04-15 03:30:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:30:01,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:01,409 INFO L225 Difference]: With dead ends: 2010 [2021-04-15 03:30:01,409 INFO L226 Difference]: Without dead ends: 1988 [2021-04-15 03:30:01,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1243.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:30:01,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-04-15 03:30:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1852. [2021-04-15 03:30:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.487844408427877) internal successors, (4605), 1851 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 4605 transitions. [2021-04-15 03:30:01,425 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 4605 transitions. Word has length 32 [2021-04-15 03:30:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:01,425 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 4605 transitions. [2021-04-15 03:30:01,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 4605 transitions. [2021-04-15 03:30:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:01,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:01,427 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:01,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1870 [2021-04-15 03:30:01,627 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:01,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 141 times [2021-04-15 03:30:01,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:01,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624808286] [2021-04-15 03:30:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:01,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624808286] [2021-04-15 03:30:01,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835199010] [2021-04-15 03:30:01,878 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 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 03:30:01,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:30:01,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:01,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:02,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:02,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636541493] [2021-04-15 03:30:02,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:02,415 INFO L87 Difference]: Start difference. First operand 1852 states and 4605 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:03,241 INFO L93 Difference]: Finished difference Result 2114 states and 5236 transitions. [2021-04-15 03:30:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:03,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:03,244 INFO L225 Difference]: With dead ends: 2114 [2021-04-15 03:30:03,244 INFO L226 Difference]: Without dead ends: 2076 [2021-04-15 03:30:03,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1276.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:30:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-04-15 03:30:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1876. [2021-04-15 03:30:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.488) internal successors, (4665), 1875 states have internal predecessors, (4665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 4665 transitions. [2021-04-15 03:30:03,262 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 4665 transitions. Word has length 32 [2021-04-15 03:30:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:03,262 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 4665 transitions. [2021-04-15 03:30:03,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 4665 transitions. [2021-04-15 03:30:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:03,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:03,263 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:03,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1886,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:03,464 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 142 times [2021-04-15 03:30:03,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:03,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929728507] [2021-04-15 03:30:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:03,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929728507] [2021-04-15 03:30:03,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590617330] [2021-04-15 03:30:03,648 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 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 03:30:03,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:03,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:03,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:04,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:04,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:04,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293865612] [2021-04-15 03:30:04,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:04,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:04,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:04,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:04,141 INFO L87 Difference]: Start difference. First operand 1876 states and 4665 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:04,830 INFO L93 Difference]: Finished difference Result 2066 states and 5112 transitions. [2021-04-15 03:30:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:04,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:04,833 INFO L225 Difference]: With dead ends: 2066 [2021-04-15 03:30:04,833 INFO L226 Difference]: Without dead ends: 2020 [2021-04-15 03:30:04,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-04-15 03:30:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1868. [2021-04-15 03:30:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.487948580610605) internal successors, (4645), 1867 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 4645 transitions. [2021-04-15 03:30:04,852 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 4645 transitions. Word has length 32 [2021-04-15 03:30:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:04,852 INFO L480 AbstractCegarLoop]: Abstraction has 1868 states and 4645 transitions. [2021-04-15 03:30:04,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 4645 transitions. [2021-04-15 03:30:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:04,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:04,854 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:05,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:05,054 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 143 times [2021-04-15 03:30:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:05,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285122773] [2021-04-15 03:30:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285122773] [2021-04-15 03:30:05,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773810567] [2021-04-15 03:30:05,245 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 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 03:30:05,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:30:05,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:05,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:05,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:05,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:05,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064907528] [2021-04-15 03:30:05,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:05,673 INFO L87 Difference]: Start difference. First operand 1868 states and 4645 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:06,375 INFO L93 Difference]: Finished difference Result 2042 states and 5060 transitions. [2021-04-15 03:30:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:06,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:06,377 INFO L225 Difference]: With dead ends: 2042 [2021-04-15 03:30:06,377 INFO L226 Difference]: Without dead ends: 2012 [2021-04-15 03:30:06,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:30:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-04-15 03:30:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1884. [2021-04-15 03:30:06,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.4880509824747743) internal successors, (4685), 1883 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 4685 transitions. [2021-04-15 03:30:06,393 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 4685 transitions. Word has length 32 [2021-04-15 03:30:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:06,393 INFO L480 AbstractCegarLoop]: Abstraction has 1884 states and 4685 transitions. [2021-04-15 03:30:06,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 4685 transitions. [2021-04-15 03:30:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:06,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:06,395 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:06,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1922 [2021-04-15 03:30:06,596 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:06,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:06,596 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 144 times [2021-04-15 03:30:06,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:06,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752518202] [2021-04-15 03:30:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752518202] [2021-04-15 03:30:06,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675308021] [2021-04-15 03:30:06,830 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 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 03:30:06,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:30:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:06,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:07,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246233864] [2021-04-15 03:30:07,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:07,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:07,270 INFO L87 Difference]: Start difference. First operand 1884 states and 4685 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:08,031 INFO L93 Difference]: Finished difference Result 2098 states and 5196 transitions. [2021-04-15 03:30:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:30:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:08,033 INFO L225 Difference]: With dead ends: 2098 [2021-04-15 03:30:08,033 INFO L226 Difference]: Without dead ends: 2060 [2021-04-15 03:30:08,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1090.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:30:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-04-15 03:30:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1900. [2021-04-15 03:30:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.4881516587677726) internal successors, (4725), 1899 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 4725 transitions. [2021-04-15 03:30:08,050 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 4725 transitions. Word has length 32 [2021-04-15 03:30:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:08,050 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 4725 transitions. [2021-04-15 03:30:08,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 4725 transitions. [2021-04-15 03:30:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:08,052 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:08,052 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:08,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:08,252 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 822283450, now seen corresponding path program 145 times [2021-04-15 03:30:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:08,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221241348] [2021-04-15 03:30:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221241348] [2021-04-15 03:30:08,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134456653] [2021-04-15 03:30:08,509 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 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 03:30:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:08,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:08,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:08,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265617582] [2021-04-15 03:30:08,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:08,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:08,976 INFO L87 Difference]: Start difference. First operand 1900 states and 4725 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:09,716 INFO L93 Difference]: Finished difference Result 2170 states and 5372 transitions. [2021-04-15 03:30:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:09,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:09,719 INFO L225 Difference]: With dead ends: 2170 [2021-04-15 03:30:09,719 INFO L226 Difference]: Without dead ends: 2124 [2021-04-15 03:30:09,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1137.6ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-04-15 03:30:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1892. [2021-04-15 03:30:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 2.4881015335801164) internal successors, (4705), 1891 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 4705 transitions. [2021-04-15 03:30:09,738 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 4705 transitions. Word has length 32 [2021-04-15 03:30:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:09,738 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 4705 transitions. [2021-04-15 03:30:09,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 4705 transitions. [2021-04-15 03:30:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:09,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:09,739 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:09,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1952 [2021-04-15 03:30:09,940 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash -448523582, now seen corresponding path program 146 times [2021-04-15 03:30:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:09,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917071498] [2021-04-15 03:30:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:10,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917071498] [2021-04-15 03:30:10,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029245978] [2021-04-15 03:30:10,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:10,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:10,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:10,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:10,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:10,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222542835] [2021-04-15 03:30:10,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:10,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:10,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:10,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:10,905 INFO L87 Difference]: Start difference. First operand 1892 states and 4705 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:11,643 INFO L93 Difference]: Finished difference Result 2130 states and 5276 transitions. [2021-04-15 03:30:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:11,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:11,647 INFO L225 Difference]: With dead ends: 2130 [2021-04-15 03:30:11,647 INFO L226 Difference]: Without dead ends: 2092 [2021-04-15 03:30:11,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1196.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:11,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-04-15 03:30:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1916. [2021-04-15 03:30:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 2.4882506527415145) internal successors, (4765), 1915 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 4765 transitions. [2021-04-15 03:30:11,665 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 4765 transitions. Word has length 32 [2021-04-15 03:30:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:11,665 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 4765 transitions. [2021-04-15 03:30:11,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 4765 transitions. [2021-04-15 03:30:11,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:11,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:11,667 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:11,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1969,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:11,868 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:11,868 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 147 times [2021-04-15 03:30:11,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:11,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216085384] [2021-04-15 03:30:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216085384] [2021-04-15 03:30:12,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565948323] [2021-04-15 03:30:12,111 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 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 03:30:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:30:12,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:12,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:12,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:12,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392841931] [2021-04-15 03:30:12,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:12,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:12,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:12,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:12,527 INFO L87 Difference]: Start difference. First operand 1916 states and 4765 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:13,530 INFO L93 Difference]: Finished difference Result 2258 states and 5604 transitions. [2021-04-15 03:30:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:30:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:13,533 INFO L225 Difference]: With dead ends: 2258 [2021-04-15 03:30:13,533 INFO L226 Difference]: Without dead ends: 2228 [2021-04-15 03:30:13,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1309.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 03:30:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-04-15 03:30:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1956. [2021-04-15 03:30:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 2.4884910485933505) internal successors, (4865), 1955 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 4865 transitions. [2021-04-15 03:30:13,551 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 4865 transitions. Word has length 32 [2021-04-15 03:30:13,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:13,551 INFO L480 AbstractCegarLoop]: Abstraction has 1956 states and 4865 transitions. [2021-04-15 03:30:13,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:13,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 4865 transitions. [2021-04-15 03:30:13,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:13,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:13,552 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:13,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1985,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:13,753 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 148 times [2021-04-15 03:30:13,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:13,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966970694] [2021-04-15 03:30:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:14,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966970694] [2021-04-15 03:30:14,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340100295] [2021-04-15 03:30:14,015 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:14,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:14,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:14,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:14,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:14,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534770851] [2021-04-15 03:30:14,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:14,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:14,423 INFO L87 Difference]: Start difference. First operand 1956 states and 4865 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:15,105 INFO L93 Difference]: Finished difference Result 2098 states and 5196 transitions. [2021-04-15 03:30:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:30:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:15,108 INFO L225 Difference]: With dead ends: 2098 [2021-04-15 03:30:15,108 INFO L226 Difference]: Without dead ends: 2060 [2021-04-15 03:30:15,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 965.0ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:30:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-04-15 03:30:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1948. [2021-04-15 03:30:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.4884437596302003) internal successors, (4845), 1947 states have internal predecessors, (4845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 4845 transitions. [2021-04-15 03:30:15,126 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 4845 transitions. Word has length 32 [2021-04-15 03:30:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:15,126 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 4845 transitions. [2021-04-15 03:30:15,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 4845 transitions. [2021-04-15 03:30:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:15,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:15,129 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:15,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:15,345 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1553149882, now seen corresponding path program 149 times [2021-04-15 03:30:15,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:15,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052068102] [2021-04-15 03:30:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:15,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052068102] [2021-04-15 03:30:15,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977193819] [2021-04-15 03:30:15,560 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 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 03:30:15,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:30:15,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:15,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:16,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:16,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:16,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63508573] [2021-04-15 03:30:16,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:16,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:16,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:16,003 INFO L87 Difference]: Start difference. First operand 1948 states and 4845 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:16,659 INFO L93 Difference]: Finished difference Result 2202 states and 5452 transitions. [2021-04-15 03:30:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:16,662 INFO L225 Difference]: With dead ends: 2202 [2021-04-15 03:30:16,662 INFO L226 Difference]: Without dead ends: 2156 [2021-04-15 03:30:16,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 984.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-04-15 03:30:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1964. [2021-04-15 03:30:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.488537952114111) internal successors, (4885), 1963 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 4885 transitions. [2021-04-15 03:30:16,679 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 4885 transitions. Word has length 32 [2021-04-15 03:30:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:16,679 INFO L480 AbstractCegarLoop]: Abstraction has 1964 states and 4885 transitions. [2021-04-15 03:30:16,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 4885 transitions. [2021-04-15 03:30:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:16,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:16,681 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:16,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2019,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:16,881 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 150 times [2021-04-15 03:30:16,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:16,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144580703] [2021-04-15 03:30:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:17,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144580703] [2021-04-15 03:30:17,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648730577] [2021-04-15 03:30:17,161 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 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 03:30:17,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:30:17,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:17,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:17,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:17,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:17,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:17,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399626586] [2021-04-15 03:30:17,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:17,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:17,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:17,758 INFO L87 Difference]: Start difference. First operand 1964 states and 4885 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:18,616 INFO L93 Difference]: Finished difference Result 2210 states and 5476 transitions. [2021-04-15 03:30:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:18,619 INFO L225 Difference]: With dead ends: 2210 [2021-04-15 03:30:18,619 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 03:30:18,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1313.2ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:30:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 03:30:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1988. [2021-04-15 03:30:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.4886763965777554) internal successors, (4945), 1987 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4945 transitions. [2021-04-15 03:30:18,640 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4945 transitions. Word has length 32 [2021-04-15 03:30:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:18,640 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4945 transitions. [2021-04-15 03:30:18,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4945 transitions. [2021-04-15 03:30:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:18,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:18,642 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:18,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-04-15 03:30:18,842 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 151 times [2021-04-15 03:30:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:18,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852025283] [2021-04-15 03:30:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:19,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852025283] [2021-04-15 03:30:19,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110054535] [2021-04-15 03:30:19,125 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 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 03:30:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:19,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:19,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:19,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239243937] [2021-04-15 03:30:19,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:19,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:19,697 INFO L87 Difference]: Start difference. First operand 1988 states and 4945 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:20,704 INFO L93 Difference]: Finished difference Result 2258 states and 5604 transitions. [2021-04-15 03:30:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:20,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:20,707 INFO L225 Difference]: With dead ends: 2258 [2021-04-15 03:30:20,707 INFO L226 Difference]: Without dead ends: 2236 [2021-04-15 03:30:20,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1487.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:30:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-04-15 03:30:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1972. [2021-04-15 03:30:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 2.4885844748858448) internal successors, (4905), 1971 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 4905 transitions. [2021-04-15 03:30:20,726 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 4905 transitions. Word has length 32 [2021-04-15 03:30:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:20,726 INFO L480 AbstractCegarLoop]: Abstraction has 1972 states and 4905 transitions. [2021-04-15 03:30:20,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 4905 transitions. [2021-04-15 03:30:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:20,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:20,728 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:20,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:20,928 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 152 times [2021-04-15 03:30:20,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:20,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198482420] [2021-04-15 03:30:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198482420] [2021-04-15 03:30:21,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040950479] [2021-04-15 03:30:21,127 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 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 03:30:21,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:21,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:21,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:21,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:21,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525783829] [2021-04-15 03:30:21,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:21,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:21,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:21,603 INFO L87 Difference]: Start difference. First operand 1972 states and 4905 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:22,305 INFO L93 Difference]: Finished difference Result 2146 states and 5316 transitions. [2021-04-15 03:30:22,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:22,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:22,308 INFO L225 Difference]: With dead ends: 2146 [2021-04-15 03:30:22,309 INFO L226 Difference]: Without dead ends: 2108 [2021-04-15 03:30:22,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1044.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-04-15 03:30:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1988. [2021-04-15 03:30:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.4886763965777554) internal successors, (4945), 1987 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4945 transitions. [2021-04-15 03:30:22,327 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4945 transitions. Word has length 32 [2021-04-15 03:30:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:22,327 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4945 transitions. [2021-04-15 03:30:22,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4945 transitions. [2021-04-15 03:30:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:22,329 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:22,329 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:22,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2082 [2021-04-15 03:30:22,529 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 153 times [2021-04-15 03:30:22,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:22,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993862656] [2021-04-15 03:30:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:22,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993862656] [2021-04-15 03:30:22,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877237743] [2021-04-15 03:30:22,759 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 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 03:30:22,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:30:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:23,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:23,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:23,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519835175] [2021-04-15 03:30:23,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:23,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:23,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:23,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:23,345 INFO L87 Difference]: Start difference. First operand 1988 states and 4945 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:24,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:24,189 INFO L93 Difference]: Finished difference Result 2322 states and 5756 transitions. [2021-04-15 03:30:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:24,192 INFO L225 Difference]: With dead ends: 2322 [2021-04-15 03:30:24,192 INFO L226 Difference]: Without dead ends: 2276 [2021-04-15 03:30:24,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1326.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:24,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-04-15 03:30:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2012. [2021-04-15 03:30:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 2011 states have (on average 2.4888115365489805) internal successors, (5005), 2011 states have internal predecessors, (5005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 5005 transitions. [2021-04-15 03:30:24,211 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 5005 transitions. Word has length 32 [2021-04-15 03:30:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:24,211 INFO L480 AbstractCegarLoop]: Abstraction has 2012 states and 5005 transitions. [2021-04-15 03:30:24,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 5005 transitions. [2021-04-15 03:30:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:24,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:24,212 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:24,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:24,413 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:24,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1640178558, now seen corresponding path program 154 times [2021-04-15 03:30:24,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:24,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003528905] [2021-04-15 03:30:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:24,661 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 12 [2021-04-15 03:30:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003528905] [2021-04-15 03:30:24,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100376708] [2021-04-15 03:30:24,810 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 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 03:30:24,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:24,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:24,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:25,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:25,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:25,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290141653] [2021-04-15 03:30:25,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:25,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:25,306 INFO L87 Difference]: Start difference. First operand 2012 states and 5005 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:26,071 INFO L93 Difference]: Finished difference Result 2266 states and 5620 transitions. [2021-04-15 03:30:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:26,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:26,074 INFO L225 Difference]: With dead ends: 2266 [2021-04-15 03:30:26,074 INFO L226 Difference]: Without dead ends: 2236 [2021-04-15 03:30:26,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-04-15 03:30:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2020. [2021-04-15 03:30:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 2.488855869242199) internal successors, (5025), 2019 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 5025 transitions. [2021-04-15 03:30:26,093 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 5025 transitions. Word has length 32 [2021-04-15 03:30:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:26,093 INFO L480 AbstractCegarLoop]: Abstraction has 2020 states and 5025 transitions. [2021-04-15 03:30:26,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 5025 transitions. [2021-04-15 03:30:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:26,095 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:26,095 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:26,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-04-15 03:30:26,295 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:26,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1816200190, now seen corresponding path program 155 times [2021-04-15 03:30:26,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:26,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595026259] [2021-04-15 03:30:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:26,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595026259] [2021-04-15 03:30:26,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608874356] [2021-04-15 03:30:26,678 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 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 03:30:26,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:30:26,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:27,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:27,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:27,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183027819] [2021-04-15 03:30:27,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:27,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:27,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:27,233 INFO L87 Difference]: Start difference. First operand 2020 states and 5025 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:27,909 INFO L93 Difference]: Finished difference Result 2218 states and 5500 transitions. [2021-04-15 03:30:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:27,912 INFO L225 Difference]: With dead ends: 2218 [2021-04-15 03:30:27,912 INFO L226 Difference]: Without dead ends: 2188 [2021-04-15 03:30:27,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1228.1ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:30:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-04-15 03:30:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2060. [2021-04-15 03:30:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.4890723652258377) internal successors, (5125), 2059 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5125 transitions. [2021-04-15 03:30:27,930 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5125 transitions. Word has length 32 [2021-04-15 03:30:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:27,930 INFO L480 AbstractCegarLoop]: Abstraction has 2060 states and 5125 transitions. [2021-04-15 03:30:27,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5125 transitions. [2021-04-15 03:30:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:27,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:27,931 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:28,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:28,132 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1379646338, now seen corresponding path program 156 times [2021-04-15 03:30:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:28,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749422434] [2021-04-15 03:30:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749422434] [2021-04-15 03:30:28,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228982023] [2021-04-15 03:30:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:28,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:30:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:28,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:28,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:28,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836889017] [2021-04-15 03:30:28,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:28,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:28,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:28,949 INFO L87 Difference]: Start difference. First operand 2060 states and 5125 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:29,958 INFO L93 Difference]: Finished difference Result 2338 states and 5800 transitions. [2021-04-15 03:30:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:30:29,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:29,961 INFO L225 Difference]: With dead ends: 2338 [2021-04-15 03:30:29,961 INFO L226 Difference]: Without dead ends: 2300 [2021-04-15 03:30:29,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1402.4ms TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:30:29,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-04-15 03:30:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2076. [2021-04-15 03:30:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.4891566265060243) internal successors, (5165), 2075 states have internal predecessors, (5165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 5165 transitions. [2021-04-15 03:30:29,980 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 5165 transitions. Word has length 32 [2021-04-15 03:30:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,980 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 5165 transitions. [2021-04-15 03:30:29,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 5165 transitions. [2021-04-15 03:30:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:29,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,981 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:30,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2145 [2021-04-15 03:30:30,182 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:30,183 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 157 times [2021-04-15 03:30:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:30,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100287675] [2021-04-15 03:30:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:30,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100287675] [2021-04-15 03:30:30,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872912360] [2021-04-15 03:30:30,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:30,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:30,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:30,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:30,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395139898] [2021-04-15 03:30:30,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:30,886 INFO L87 Difference]: Start difference. First operand 2076 states and 5165 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:31,783 INFO L93 Difference]: Finished difference Result 2274 states and 5640 transitions. [2021-04-15 03:30:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:30:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:31,786 INFO L225 Difference]: With dead ends: 2274 [2021-04-15 03:30:31,787 INFO L226 Difference]: Without dead ends: 2244 [2021-04-15 03:30:31,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1256.4ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:30:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-04-15 03:30:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2068. [2021-04-15 03:30:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.48911465892598) internal successors, (5145), 2067 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5145 transitions. [2021-04-15 03:30:31,807 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5145 transitions. Word has length 32 [2021-04-15 03:30:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:31,807 INFO L480 AbstractCegarLoop]: Abstraction has 2068 states and 5145 transitions. [2021-04-15 03:30:31,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5145 transitions. [2021-04-15 03:30:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:31,809 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:31,809 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:32,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2164 [2021-04-15 03:30:32,009 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 158 times [2021-04-15 03:30:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:32,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332608800] [2021-04-15 03:30:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:32,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332608800] [2021-04-15 03:30:32,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748932987] [2021-04-15 03:30:32,281 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 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 03:30:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:32,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:32,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:32,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321197413] [2021-04-15 03:30:32,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:32,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:32,864 INFO L87 Difference]: Start difference. First operand 2068 states and 5145 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:33,717 INFO L93 Difference]: Finished difference Result 2258 states and 5600 transitions. [2021-04-15 03:30:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:33,721 INFO L225 Difference]: With dead ends: 2258 [2021-04-15 03:30:33,721 INFO L226 Difference]: Without dead ends: 2228 [2021-04-15 03:30:33,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1330.2ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:30:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-04-15 03:30:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2084. [2021-04-15 03:30:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4891982717234757) internal successors, (5185), 2083 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5185 transitions. [2021-04-15 03:30:33,741 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5185 transitions. Word has length 32 [2021-04-15 03:30:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:33,741 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 5185 transitions. [2021-04-15 03:30:33,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5185 transitions. [2021-04-15 03:30:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:33,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:33,743 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:33,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-04-15 03:30:33,943 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1459614522, now seen corresponding path program 159 times [2021-04-15 03:30:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:33,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051894972] [2021-04-15 03:30:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:34,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051894972] [2021-04-15 03:30:34,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197643591] [2021-04-15 03:30:34,335 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 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 03:30:34,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 03:30:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:34,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:34,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:34,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268443054] [2021-04-15 03:30:34,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:34,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:34,962 INFO L87 Difference]: Start difference. First operand 2084 states and 5185 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:35,483 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-04-15 03:30:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:36,023 INFO L93 Difference]: Finished difference Result 2194 states and 5444 transitions. [2021-04-15 03:30:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:36,026 INFO L225 Difference]: With dead ends: 2194 [2021-04-15 03:30:36,026 INFO L226 Difference]: Without dead ends: 2172 [2021-04-15 03:30:36,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1700.1ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-04-15 03:30:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2092. [2021-04-15 03:30:36,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.4892395982783357) internal successors, (5205), 2091 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5205 transitions. [2021-04-15 03:30:36,044 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5205 transitions. Word has length 32 [2021-04-15 03:30:36,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:36,044 INFO L480 AbstractCegarLoop]: Abstraction has 2092 states and 5205 transitions. [2021-04-15 03:30:36,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5205 transitions. [2021-04-15 03:30:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:36,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:36,046 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:36,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-04-15 03:30:36,247 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash -271155210, now seen corresponding path program 160 times [2021-04-15 03:30:36,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:36,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543445592] [2021-04-15 03:30:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543445592] [2021-04-15 03:30:36,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732249662] [2021-04-15 03:30:36,534 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 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 03:30:36,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:37,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:37,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:37,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087047884] [2021-04-15 03:30:37,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:37,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:37,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:37,130 INFO L87 Difference]: Start difference. First operand 2092 states and 5205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:37,927 INFO L93 Difference]: Finished difference Result 2266 states and 5624 transitions. [2021-04-15 03:30:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:37,931 INFO L225 Difference]: With dead ends: 2266 [2021-04-15 03:30:37,931 INFO L226 Difference]: Without dead ends: 2244 [2021-04-15 03:30:37,931 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1354.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:30:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-04-15 03:30:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 2092. [2021-04-15 03:30:37,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.4892395982783357) internal successors, (5205), 2091 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5205 transitions. [2021-04-15 03:30:37,953 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5205 transitions. Word has length 32 [2021-04-15 03:30:37,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:37,953 INFO L480 AbstractCegarLoop]: Abstraction has 2092 states and 5205 transitions. [2021-04-15 03:30:37,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:37,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5205 transitions. [2021-04-15 03:30:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:37,955 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:37,955 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:38,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:38,156 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:38,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:38,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1896809222, now seen corresponding path program 161 times [2021-04-15 03:30:38,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:38,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826250891] [2021-04-15 03:30:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:38,416 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 14 [2021-04-15 03:30:38,575 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 16 [2021-04-15 03:30:38,748 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2021-04-15 03:30:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:38,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826250891] [2021-04-15 03:30:38,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738365117] [2021-04-15 03:30:38,957 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 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 03:30:38,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-04-15 03:30:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:39,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:39,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:39,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437208253] [2021-04-15 03:30:39,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:39,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:39,389 INFO L87 Difference]: Start difference. First operand 2092 states and 5205 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:40,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:40,038 INFO L93 Difference]: Finished difference Result 2202 states and 5452 transitions. [2021-04-15 03:30:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:30:40,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:40,040 INFO L225 Difference]: With dead ends: 2202 [2021-04-15 03:30:40,040 INFO L226 Difference]: Without dead ends: 2156 [2021-04-15 03:30:40,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 864.3ms TimeCoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:30:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-04-15 03:30:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2108. [2021-04-15 03:30:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-04-15 03:30:40,058 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-04-15 03:30:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:40,058 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-04-15 03:30:40,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-04-15 03:30:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:40,060 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:40,060 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:40,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2244 [2021-04-15 03:30:40,260 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 162 times [2021-04-15 03:30:40,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:40,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834095306] [2021-04-15 03:30:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:40,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834095306] [2021-04-15 03:30:40,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271487931] [2021-04-15 03:30:40,540 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 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 03:30:40,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:30:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:30:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:40,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:40,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:40,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437431875] [2021-04-15 03:30:40,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:40,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:40,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:40,976 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:41,389 INFO L93 Difference]: Finished difference Result 2234 states and 5540 transitions. [2021-04-15 03:30:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:41,392 INFO L225 Difference]: With dead ends: 2234 [2021-04-15 03:30:41,392 INFO L226 Difference]: Without dead ends: 2204 [2021-04-15 03:30:41,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 786.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-04-15 03:30:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2108. [2021-04-15 03:30:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-04-15 03:30:41,413 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-04-15 03:30:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:41,413 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-04-15 03:30:41,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-04-15 03:30:41,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:41,415 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:41,415 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:41,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2259 [2021-04-15 03:30:41,615 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1878561090, now seen corresponding path program 163 times [2021-04-15 03:30:41,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:41,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688898518] [2021-04-15 03:30:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:41,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688898518] [2021-04-15 03:30:41,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135448939] [2021-04-15 03:30:41,768 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 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 03:30:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:30:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:42,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:42,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:42,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42307213] [2021-04-15 03:30:42,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:42,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:42,158 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:42,793 INFO L93 Difference]: Finished difference Result 2306 states and 5724 transitions. [2021-04-15 03:30:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:42,796 INFO L225 Difference]: With dead ends: 2306 [2021-04-15 03:30:42,796 INFO L226 Difference]: Without dead ends: 2276 [2021-04-15 03:30:42,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-04-15 03:30:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2108. [2021-04-15 03:30:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 2.4893213099193168) internal successors, (5245), 2107 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 5245 transitions. [2021-04-15 03:30:42,828 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 5245 transitions. Word has length 32 [2021-04-15 03:30:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:42,828 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 5245 transitions. [2021-04-15 03:30:42,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 5245 transitions. [2021-04-15 03:30:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:42,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:42,829 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:43,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:43,030 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1521975422, now seen corresponding path program 164 times [2021-04-15 03:30:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:43,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633141628] [2021-04-15 03:30:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:43,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:43,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633141628] [2021-04-15 03:30:43,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729820416] [2021-04-15 03:30:43,286 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 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 03:30:43,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:43,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:43,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:43,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990085914] [2021-04-15 03:30:43,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:43,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:43,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:43,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:43,751 INFO L87 Difference]: Start difference. First operand 2108 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:44,531 INFO L93 Difference]: Finished difference Result 2338 states and 5800 transitions. [2021-04-15 03:30:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:44,535 INFO L225 Difference]: With dead ends: 2338 [2021-04-15 03:30:44,535 INFO L226 Difference]: Without dead ends: 2308 [2021-04-15 03:30:44,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1113.2ms TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-04-15 03:30:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2124. [2021-04-15 03:30:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-04-15 03:30:44,556 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-04-15 03:30:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:44,556 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-04-15 03:30:44,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-04-15 03:30:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:44,558 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:44,558 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:44,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2284 [2021-04-15 03:30:44,758 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1709665722, now seen corresponding path program 165 times [2021-04-15 03:30:44,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:44,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082423648] [2021-04-15 03:30:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082423648] [2021-04-15 03:30:45,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803264836] [2021-04-15 03:30:45,170 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 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 03:30:45,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:30:45,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:45,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:45,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:45,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413669163] [2021-04-15 03:30:45,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:45,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:45,694 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:46,506 INFO L93 Difference]: Finished difference Result 2370 states and 5876 transitions. [2021-04-15 03:30:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:46,509 INFO L225 Difference]: With dead ends: 2370 [2021-04-15 03:30:46,509 INFO L226 Difference]: Without dead ends: 2332 [2021-04-15 03:30:46,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1259.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-04-15 03:30:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2132. [2021-04-15 03:30:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-04-15 03:30:46,529 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-04-15 03:30:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:46,529 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-04-15 03:30:46,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-04-15 03:30:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:46,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:46,531 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:46,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2306,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:46,732 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 438858690, now seen corresponding path program 166 times [2021-04-15 03:30:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:46,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380291940] [2021-04-15 03:30:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380291940] [2021-04-15 03:30:47,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281617082] [2021-04-15 03:30:47,014 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 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 03:30:47,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:47,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:47,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137664095] [2021-04-15 03:30:47,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:47,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:47,583 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:48,336 INFO L93 Difference]: Finished difference Result 2354 states and 5836 transitions. [2021-04-15 03:30:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:48,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:48,339 INFO L225 Difference]: With dead ends: 2354 [2021-04-15 03:30:48,339 INFO L226 Difference]: Without dead ends: 2316 [2021-04-15 03:30:48,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1244.4ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-04-15 03:30:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2140. [2021-04-15 03:30:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 2.4894810659186537) internal successors, (5325), 2139 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 5325 transitions. [2021-04-15 03:30:48,361 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 5325 transitions. Word has length 32 [2021-04-15 03:30:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:48,362 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 5325 transitions. [2021-04-15 03:30:48,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 5325 transitions. [2021-04-15 03:30:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:48,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:48,364 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:48,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-04-15 03:30:48,584 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1291911042, now seen corresponding path program 167 times [2021-04-15 03:30:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:48,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656973233] [2021-04-15 03:30:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656973233] [2021-04-15 03:30:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54772001] [2021-04-15 03:30:48,861 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 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 03:30:48,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:30:48,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:48,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:48,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:49,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:49,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:49,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535745751] [2021-04-15 03:30:49,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:49,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:49,421 INFO L87 Difference]: Start difference. First operand 2140 states and 5325 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:50,084 INFO L93 Difference]: Finished difference Result 2290 states and 5684 transitions. [2021-04-15 03:30:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:50,087 INFO L225 Difference]: With dead ends: 2290 [2021-04-15 03:30:50,087 INFO L226 Difference]: Without dead ends: 2268 [2021-04-15 03:30:50,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1138.5ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:30:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-04-15 03:30:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2124. [2021-04-15 03:30:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-04-15 03:30:50,106 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-04-15 03:30:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:50,106 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-04-15 03:30:50,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-04-15 03:30:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:50,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:50,108 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:50,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2354 [2021-04-15 03:30:50,308 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 168 times [2021-04-15 03:30:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:50,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277861828] [2021-04-15 03:30:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277861828] [2021-04-15 03:30:50,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608922000] [2021-04-15 03:30:50,503 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 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 03:30:50,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:30:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:50,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:50,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:50,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:50,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272930364] [2021-04-15 03:30:50,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:50,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:50,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:50,995 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:51,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:51,723 INFO L93 Difference]: Finished difference Result 2410 states and 5976 transitions. [2021-04-15 03:30:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:30:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:51,726 INFO L225 Difference]: With dead ends: 2410 [2021-04-15 03:30:51,726 INFO L226 Difference]: Without dead ends: 2372 [2021-04-15 03:30:51,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1071.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:30:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-04-15 03:30:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2140. [2021-04-15 03:30:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 2.4894810659186537) internal successors, (5325), 2139 states have internal predecessors, (5325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 5325 transitions. [2021-04-15 03:30:51,745 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 5325 transitions. Word has length 32 [2021-04-15 03:30:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:51,745 INFO L480 AbstractCegarLoop]: Abstraction has 2140 states and 5325 transitions. [2021-04-15 03:30:51,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 5325 transitions. [2021-04-15 03:30:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:51,746 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:51,746 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:51,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2377 [2021-04-15 03:30:51,947 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:51,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 169 times [2021-04-15 03:30:51,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:51,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825072848] [2021-04-15 03:30:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:52,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825072848] [2021-04-15 03:30:52,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108286609] [2021-04-15 03:30:52,132 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 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 03:30:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:52,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:52,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:52,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225799039] [2021-04-15 03:30:52,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:52,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:52,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:52,702 INFO L87 Difference]: Start difference. First operand 2140 states and 5325 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:53,628 INFO L93 Difference]: Finished difference Result 2426 states and 6020 transitions. [2021-04-15 03:30:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:53,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:53,631 INFO L225 Difference]: With dead ends: 2426 [2021-04-15 03:30:53,631 INFO L226 Difference]: Without dead ends: 2396 [2021-04-15 03:30:53,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1297.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-04-15 03:30:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2116. [2021-04-15 03:30:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.4893617021276597) internal successors, (5265), 2115 states have internal predecessors, (5265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 5265 transitions. [2021-04-15 03:30:53,651 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 5265 transitions. Word has length 32 [2021-04-15 03:30:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:53,651 INFO L480 AbstractCegarLoop]: Abstraction has 2116 states and 5265 transitions. [2021-04-15 03:30:53,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 5265 transitions. [2021-04-15 03:30:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:53,653 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:53,653 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:53,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2394,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:53,854 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:53,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 170 times [2021-04-15 03:30:53,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:53,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640905445] [2021-04-15 03:30:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640905445] [2021-04-15 03:30:54,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113188210] [2021-04-15 03:30:54,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:30:54,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:54,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:54,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:54,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192202897] [2021-04-15 03:30:54,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:54,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:54,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:54,550 INFO L87 Difference]: Start difference. First operand 2116 states and 5265 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:55,255 INFO L93 Difference]: Finished difference Result 2234 states and 5536 transitions. [2021-04-15 03:30:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:55,258 INFO L225 Difference]: With dead ends: 2234 [2021-04-15 03:30:55,258 INFO L226 Difference]: Without dead ends: 2196 [2021-04-15 03:30:55,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 946.6ms TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:30:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-04-15 03:30:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2132. [2021-04-15 03:30:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-04-15 03:30:55,277 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-04-15 03:30:55,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:55,277 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-04-15 03:30:55,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-04-15 03:30:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:55,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:55,279 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:55,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-04-15 03:30:55,480 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 171 times [2021-04-15 03:30:55,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:55,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216940195] [2021-04-15 03:30:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216940195] [2021-04-15 03:30:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798671889] [2021-04-15 03:30:55,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:55,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:30:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:56,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:56,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431413958] [2021-04-15 03:30:56,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:56,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:56,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:56,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:56,241 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:56,899 INFO L93 Difference]: Finished difference Result 2354 states and 5836 transitions. [2021-04-15 03:30:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:56,902 INFO L225 Difference]: With dead ends: 2354 [2021-04-15 03:30:56,902 INFO L226 Difference]: Without dead ends: 2308 [2021-04-15 03:30:56,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1041.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-04-15 03:30:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2132. [2021-04-15 03:30:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 2.4894415767245426) internal successors, (5305), 2131 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 5305 transitions. [2021-04-15 03:30:56,933 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 5305 transitions. Word has length 32 [2021-04-15 03:30:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:56,933 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 5305 transitions. [2021-04-15 03:30:56,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 5305 transitions. [2021-04-15 03:30:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:56,934 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:56,934 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:57,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2439 [2021-04-15 03:30:57,135 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1181393790, now seen corresponding path program 172 times [2021-04-15 03:30:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889868788] [2021-04-15 03:30:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889868788] [2021-04-15 03:30:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539046790] [2021-04-15 03:30:57,392 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:57,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:57,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:57,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:57,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:57,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:57,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:30:57,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403073645] [2021-04-15 03:30:57,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:57,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:57,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:57,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:57,807 INFO L87 Difference]: Start difference. First operand 2132 states and 5305 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:58,744 INFO L93 Difference]: Finished difference Result 2290 states and 5680 transitions. [2021-04-15 03:30:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:30:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:30:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:58,747 INFO L225 Difference]: With dead ends: 2290 [2021-04-15 03:30:58,747 INFO L226 Difference]: Without dead ends: 2260 [2021-04-15 03:30:58,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=385, Invalid=1685, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:30:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-04-15 03:30:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2124. [2021-04-15 03:30:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.4894017899199246) internal successors, (5285), 2123 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5285 transitions. [2021-04-15 03:30:58,768 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5285 transitions. Word has length 32 [2021-04-15 03:30:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:58,768 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5285 transitions. [2021-04-15 03:30:58,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5285 transitions. [2021-04-15 03:30:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:30:58,770 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:58,770 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:58,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2455 [2021-04-15 03:30:58,970 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 173 times [2021-04-15 03:30:58,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:58,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995074459] [2021-04-15 03:30:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:59,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995074459] [2021-04-15 03:30:59,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754173138] [2021-04-15 03:30:59,535 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:59,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:30:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:30:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:59,994 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:00,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:00,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:00,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688601757] [2021-04-15 03:31:00,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:00,141 INFO L87 Difference]: Start difference. First operand 2124 states and 5285 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:01,184 INFO L93 Difference]: Finished difference Result 2506 states and 6212 transitions. [2021-04-15 03:31:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:31:01,185 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:01,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:01,187 INFO L225 Difference]: With dead ends: 2506 [2021-04-15 03:31:01,187 INFO L226 Difference]: Without dead ends: 2460 [2021-04-15 03:31:01,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1636.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:31:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-04-15 03:31:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2156. [2021-04-15 03:31:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.4895591647331785) internal successors, (5365), 2155 states have internal predecessors, (5365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 5365 transitions. [2021-04-15 03:31:01,217 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 5365 transitions. Word has length 32 [2021-04-15 03:31:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:01,217 INFO L480 AbstractCegarLoop]: Abstraction has 2156 states and 5365 transitions. [2021-04-15 03:31:01,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 5365 transitions. [2021-04-15 03:31:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:01,219 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:01,219 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:01,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:01,420 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:01,420 INFO L82 PathProgramCache]: Analyzing trace with hash -490019970, now seen corresponding path program 174 times [2021-04-15 03:31:01,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:01,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419706819] [2021-04-15 03:31:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419706819] [2021-04-15 03:31:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815428658] [2021-04-15 03:31:01,698 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:01,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:31:01,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:01,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:02,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:02,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:02,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404544020] [2021-04-15 03:31:02,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:02,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:02,169 INFO L87 Difference]: Start difference. First operand 2156 states and 5365 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:02,805 INFO L93 Difference]: Finished difference Result 2330 states and 5776 transitions. [2021-04-15 03:31:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:31:02,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:02,808 INFO L225 Difference]: With dead ends: 2330 [2021-04-15 03:31:02,808 INFO L226 Difference]: Without dead ends: 2292 [2021-04-15 03:31:02,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:31:02,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-04-15 03:31:02,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2172. [2021-04-15 03:31:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.4896361123906035) internal successors, (5405), 2171 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5405 transitions. [2021-04-15 03:31:02,826 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5405 transitions. Word has length 32 [2021-04-15 03:31:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:02,827 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 5405 transitions. [2021-04-15 03:31:02,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5405 transitions. [2021-04-15 03:31:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:02,828 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:02,828 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:03,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2493,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:03,029 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:03,029 INFO L82 PathProgramCache]: Analyzing trace with hash -302329670, now seen corresponding path program 175 times [2021-04-15 03:31:03,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:03,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524402026] [2021-04-15 03:31:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:03,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524402026] [2021-04-15 03:31:03,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437847627] [2021-04-15 03:31:03,526 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:03,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:04,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:04,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126768636] [2021-04-15 03:31:04,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:04,149 INFO L87 Difference]: Start difference. First operand 2172 states and 5405 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:05,015 INFO L93 Difference]: Finished difference Result 2450 states and 6076 transitions. [2021-04-15 03:31:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:05,018 INFO L225 Difference]: With dead ends: 2450 [2021-04-15 03:31:05,019 INFO L226 Difference]: Without dead ends: 2412 [2021-04-15 03:31:05,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1487.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:31:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-04-15 03:31:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2188. [2021-04-15 03:31:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4897119341563787) internal successors, (5445), 2187 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5445 transitions. [2021-04-15 03:31:05,038 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5445 transitions. Word has length 32 [2021-04-15 03:31:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:05,038 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 5445 transitions. [2021-04-15 03:31:05,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5445 transitions. [2021-04-15 03:31:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:05,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:05,040 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:05,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:05,240 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 176 times [2021-04-15 03:31:05,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:05,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603428824] [2021-04-15 03:31:05,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:05,461 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-04-15 03:31:05,682 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-04-15 03:31:05,896 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 29 [2021-04-15 03:31:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603428824] [2021-04-15 03:31:06,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943126738] [2021-04-15 03:31:06,033 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:06,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:06,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:06,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:06,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:06,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:06,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318884322] [2021-04-15 03:31:06,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:06,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:06,629 INFO L87 Difference]: Start difference. First operand 2188 states and 5445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:07,490 INFO L93 Difference]: Finished difference Result 2498 states and 6200 transitions. [2021-04-15 03:31:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:31:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:07,493 INFO L225 Difference]: With dead ends: 2498 [2021-04-15 03:31:07,493 INFO L226 Difference]: Without dead ends: 2468 [2021-04-15 03:31:07,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1394.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:31:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-04-15 03:31:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 2172. [2021-04-15 03:31:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 2.4896361123906035) internal successors, (5405), 2171 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 5405 transitions. [2021-04-15 03:31:07,513 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 5405 transitions. Word has length 32 [2021-04-15 03:31:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:07,513 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 5405 transitions. [2021-04-15 03:31:07,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 5405 transitions. [2021-04-15 03:31:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:07,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:07,515 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:07,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2530 [2021-04-15 03:31:07,715 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:07,716 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 177 times [2021-04-15 03:31:07,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:07,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770191116] [2021-04-15 03:31:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:07,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770191116] [2021-04-15 03:31:07,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899157009] [2021-04-15 03:31:07,932 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:07,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:31:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:08,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:08,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:08,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137003979] [2021-04-15 03:31:08,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:08,545 INFO L87 Difference]: Start difference. First operand 2172 states and 5405 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:09,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:09,533 INFO L93 Difference]: Finished difference Result 2386 states and 5924 transitions. [2021-04-15 03:31:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:31:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:09,535 INFO L225 Difference]: With dead ends: 2386 [2021-04-15 03:31:09,535 INFO L226 Difference]: Without dead ends: 2364 [2021-04-15 03:31:09,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1436.2ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:31:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-04-15 03:31:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2180. [2021-04-15 03:31:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 2.489674162459844) internal successors, (5425), 2179 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 5425 transitions. [2021-04-15 03:31:09,553 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 5425 transitions. Word has length 32 [2021-04-15 03:31:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:09,554 INFO L480 AbstractCegarLoop]: Abstraction has 2180 states and 5425 transitions. [2021-04-15 03:31:09,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 5425 transitions. [2021-04-15 03:31:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:09,556 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:09,556 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:09,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-04-15 03:31:09,757 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 178 times [2021-04-15 03:31:09,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:09,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053419751] [2021-04-15 03:31:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:10,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053419751] [2021-04-15 03:31:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899192615] [2021-04-15 03:31:10,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:10,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:10,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:10,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:10,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:10,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324799875] [2021-04-15 03:31:10,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:10,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:10,552 INFO L87 Difference]: Start difference. First operand 2180 states and 5425 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:11,593 INFO L93 Difference]: Finished difference Result 2482 states and 6160 transitions. [2021-04-15 03:31:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:31:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:11,596 INFO L225 Difference]: With dead ends: 2482 [2021-04-15 03:31:11,596 INFO L226 Difference]: Without dead ends: 2452 [2021-04-15 03:31:11,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1424.5ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:31:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-04-15 03:31:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2188. [2021-04-15 03:31:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4897119341563787) internal successors, (5445), 2187 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5445 transitions. [2021-04-15 03:31:11,615 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5445 transitions. Word has length 32 [2021-04-15 03:31:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:11,615 INFO L480 AbstractCegarLoop]: Abstraction has 2188 states and 5445 transitions. [2021-04-15 03:31:11,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5445 transitions. [2021-04-15 03:31:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:11,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:11,617 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:11,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2557 [2021-04-15 03:31:11,817 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash 766874298, now seen corresponding path program 179 times [2021-04-15 03:31:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:11,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461105449] [2021-04-15 03:31:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:12,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461105449] [2021-04-15 03:31:12,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548067228] [2021-04-15 03:31:12,063 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:12,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:31:12,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:12,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:12,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448228686] [2021-04-15 03:31:12,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:12,641 INFO L87 Difference]: Start difference. First operand 2188 states and 5445 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:12,939 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-04-15 03:31:13,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:13,741 INFO L93 Difference]: Finished difference Result 2458 states and 6100 transitions. [2021-04-15 03:31:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:31:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:13,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:13,744 INFO L225 Difference]: With dead ends: 2458 [2021-04-15 03:31:13,744 INFO L226 Difference]: Without dead ends: 2428 [2021-04-15 03:31:13,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1524.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:31:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-04-15 03:31:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2212. [2021-04-15 03:31:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.4898236092265944) internal successors, (5505), 2211 states have internal predecessors, (5505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 5505 transitions. [2021-04-15 03:31:13,762 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 5505 transitions. Word has length 32 [2021-04-15 03:31:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:13,762 INFO L480 AbstractCegarLoop]: Abstraction has 2212 states and 5505 transitions. [2021-04-15 03:31:13,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 5505 transitions. [2021-04-15 03:31:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:13,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:13,763 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:13,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2576 [2021-04-15 03:31:13,964 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 180 times [2021-04-15 03:31:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:13,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246055319] [2021-04-15 03:31:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246055319] [2021-04-15 03:31:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734892759] [2021-04-15 03:31:14,193 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:14,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:31:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:31:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:14,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:14,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:14,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556739544] [2021-04-15 03:31:14,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:14,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:14,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:14,775 INFO L87 Difference]: Start difference. First operand 2212 states and 5505 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:15,477 INFO L93 Difference]: Finished difference Result 2482 states and 6160 transitions. [2021-04-15 03:31:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:15,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:15,480 INFO L225 Difference]: With dead ends: 2482 [2021-04-15 03:31:15,480 INFO L226 Difference]: Without dead ends: 2452 [2021-04-15 03:31:15,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1158.1ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-04-15 03:31:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2220. [2021-04-15 03:31:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.4898602974312753) internal successors, (5525), 2219 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 5525 transitions. [2021-04-15 03:31:15,499 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 5525 transitions. Word has length 32 [2021-04-15 03:31:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:15,499 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 5525 transitions. [2021-04-15 03:31:15,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 5525 transitions. [2021-04-15 03:31:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:15,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:15,504 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:15,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2592,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:15,723 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:15,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 181 times [2021-04-15 03:31:15,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:15,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048468209] [2021-04-15 03:31:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:15,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048468209] [2021-04-15 03:31:15,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269898190] [2021-04-15 03:31:15,975 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:15,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:16,456 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:16,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:16,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168580257] [2021-04-15 03:31:16,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:16,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:16,600 INFO L87 Difference]: Start difference. First operand 2220 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:17,582 INFO L93 Difference]: Finished difference Result 2482 states and 6156 transitions. [2021-04-15 03:31:17,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:17,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:17,585 INFO L225 Difference]: With dead ends: 2482 [2021-04-15 03:31:17,585 INFO L226 Difference]: Without dead ends: 2444 [2021-04-15 03:31:17,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1476.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-04-15 03:31:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2228. [2021-04-15 03:31:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.4898967220475976) internal successors, (5545), 2227 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 5545 transitions. [2021-04-15 03:31:17,605 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 5545 transitions. Word has length 32 [2021-04-15 03:31:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:17,605 INFO L480 AbstractCegarLoop]: Abstraction has 2228 states and 5545 transitions. [2021-04-15 03:31:17,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 5545 transitions. [2021-04-15 03:31:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:17,607 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:17,607 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:17,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:17,809 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 182 times [2021-04-15 03:31:17,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:17,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328429565] [2021-04-15 03:31:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328429565] [2021-04-15 03:31:18,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401231177] [2021-04-15 03:31:18,060 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:18,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:18,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:18,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:18,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671324083] [2021-04-15 03:31:18,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:18,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:18,737 INFO L87 Difference]: Start difference. First operand 2228 states and 5545 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,053 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-04-15 03:31:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:19,660 INFO L93 Difference]: Finished difference Result 2450 states and 6084 transitions. [2021-04-15 03:31:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:19,663 INFO L225 Difference]: With dead ends: 2450 [2021-04-15 03:31:19,663 INFO L226 Difference]: Without dead ends: 2428 [2021-04-15 03:31:19,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1436.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-04-15 03:31:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2220. [2021-04-15 03:31:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.4898602974312753) internal successors, (5525), 2219 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 5525 transitions. [2021-04-15 03:31:19,682 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 5525 transitions. Word has length 32 [2021-04-15 03:31:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:19,682 INFO L480 AbstractCegarLoop]: Abstraction has 2220 states and 5525 transitions. [2021-04-15 03:31:19,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 5525 transitions. [2021-04-15 03:31:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:19,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:19,684 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:19,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:19,889 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:19,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:19,889 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 183 times [2021-04-15 03:31:19,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:19,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772731017] [2021-04-15 03:31:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:20,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772731017] [2021-04-15 03:31:20,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374966917] [2021-04-15 03:31:20,250 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:20,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 03:31:20,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:20,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:20,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219927555] [2021-04-15 03:31:20,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:20,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:20,679 INFO L87 Difference]: Start difference. First operand 2220 states and 5525 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:22,078 INFO L93 Difference]: Finished difference Result 2526 states and 6260 transitions. [2021-04-15 03:31:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:31:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:22,081 INFO L225 Difference]: With dead ends: 2526 [2021-04-15 03:31:22,081 INFO L226 Difference]: Without dead ends: 2480 [2021-04-15 03:31:22,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1717.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1874, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 03:31:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-04-15 03:31:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2296. [2021-04-15 03:31:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.4893246187363833) internal successors, (5713), 2295 states have internal predecessors, (5713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5713 transitions. [2021-04-15 03:31:22,099 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5713 transitions. Word has length 32 [2021-04-15 03:31:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:22,099 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 5713 transitions. [2021-04-15 03:31:22,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5713 transitions. [2021-04-15 03:31:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:22,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:22,102 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:22,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2648 [2021-04-15 03:31:22,305 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1646820354, now seen corresponding path program 184 times [2021-04-15 03:31:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:22,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709996936] [2021-04-15 03:31:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709996936] [2021-04-15 03:31:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591095422] [2021-04-15 03:31:22,587 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:22,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:22,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:23,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:23,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:23,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056445741] [2021-04-15 03:31:23,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:23,198 INFO L87 Difference]: Start difference. First operand 2296 states and 5713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:23,485 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 03:31:24,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:24,070 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-04-15 03:31:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:24,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:24,074 INFO L225 Difference]: With dead ends: 2486 [2021-04-15 03:31:24,074 INFO L226 Difference]: Without dead ends: 2456 [2021-04-15 03:31:24,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1404.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:31:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-04-15 03:31:24,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2304. [2021-04-15 03:31:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.4893617021276597) internal successors, (5733), 2303 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5733 transitions. [2021-04-15 03:31:24,096 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5733 transitions. Word has length 32 [2021-04-15 03:31:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:24,096 INFO L480 AbstractCegarLoop]: Abstraction has 2304 states and 5733 transitions. [2021-04-15 03:31:24,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5733 transitions. [2021-04-15 03:31:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:24,098 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:24,098 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:24,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2664 [2021-04-15 03:31:24,298 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 391349374, now seen corresponding path program 185 times [2021-04-15 03:31:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:24,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238269548] [2021-04-15 03:31:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238269548] [2021-04-15 03:31:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211481225] [2021-04-15 03:31:24,519 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:24,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:31:24,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:25,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:25,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:25,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939948352] [2021-04-15 03:31:25,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:25,007 INFO L87 Difference]: Start difference. First operand 2304 states and 5733 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:25,608 INFO L93 Difference]: Finished difference Result 2430 states and 6024 transitions. [2021-04-15 03:31:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:31:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:25,611 INFO L225 Difference]: With dead ends: 2430 [2021-04-15 03:31:25,611 INFO L226 Difference]: Without dead ends: 2392 [2021-04-15 03:31:25,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 965.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:31:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-04-15 03:31:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2312. [2021-04-15 03:31:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.489398528775422) internal successors, (5753), 2311 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5753 transitions. [2021-04-15 03:31:25,632 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5753 transitions. Word has length 32 [2021-04-15 03:31:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:25,632 INFO L480 AbstractCegarLoop]: Abstraction has 2312 states and 5753 transitions. [2021-04-15 03:31:25,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5753 transitions. [2021-04-15 03:31:25,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:25,634 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:25,634 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:25,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:25,835 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:25,835 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 186 times [2021-04-15 03:31:25,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:25,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821980456] [2021-04-15 03:31:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:26,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821980456] [2021-04-15 03:31:26,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452874012] [2021-04-15 03:31:26,097 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:26,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:31:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:26,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:26,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195202854] [2021-04-15 03:31:26,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:26,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:26,744 INFO L87 Difference]: Start difference. First operand 2312 states and 5753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:27,575 INFO L93 Difference]: Finished difference Result 2590 states and 6424 transitions. [2021-04-15 03:31:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:27,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:27,578 INFO L225 Difference]: With dead ends: 2590 [2021-04-15 03:31:27,578 INFO L226 Difference]: Without dead ends: 2544 [2021-04-15 03:31:27,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1382.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:31:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-04-15 03:31:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2320. [2021-04-15 03:31:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.4894351013367833) internal successors, (5773), 2319 states have internal predecessors, (5773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5773 transitions. [2021-04-15 03:31:27,601 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5773 transitions. Word has length 32 [2021-04-15 03:31:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:27,601 INFO L480 AbstractCegarLoop]: Abstraction has 2320 states and 5773 transitions. [2021-04-15 03:31:27,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5773 transitions. [2021-04-15 03:31:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:27,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:27,603 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2704 [2021-04-15 03:31:27,804 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 187 times [2021-04-15 03:31:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:27,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301069898] [2021-04-15 03:31:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:27,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301069898] [2021-04-15 03:31:27,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504817907] [2021-04-15 03:31:27,994 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:28,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:28,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702935752] [2021-04-15 03:31:28,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:28,545 INFO L87 Difference]: Start difference. First operand 2320 states and 5773 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:29,660 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-04-15 03:31:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:31:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:29,663 INFO L225 Difference]: With dead ends: 2590 [2021-04-15 03:31:29,663 INFO L226 Difference]: Without dead ends: 2552 [2021-04-15 03:31:29,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1626, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:31:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-04-15 03:31:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2328. [2021-04-15 03:31:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4894714224323162) internal successors, (5793), 2327 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5793 transitions. [2021-04-15 03:31:29,685 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5793 transitions. Word has length 32 [2021-04-15 03:31:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:29,685 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 5793 transitions. [2021-04-15 03:31:29,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5793 transitions. [2021-04-15 03:31:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:29,687 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:29,687 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:29,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2719,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:29,887 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:29,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 188 times [2021-04-15 03:31:29,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:29,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121025265] [2021-04-15 03:31:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121025265] [2021-04-15 03:31:30,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545568586] [2021-04-15 03:31:30,090 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:30,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:30,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655004896] [2021-04-15 03:31:30,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:30,756 INFO L87 Difference]: Start difference. First operand 2328 states and 5793 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:31,638 INFO L93 Difference]: Finished difference Result 2574 states and 6388 transitions. [2021-04-15 03:31:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:31:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:31,641 INFO L225 Difference]: With dead ends: 2574 [2021-04-15 03:31:31,641 INFO L226 Difference]: Without dead ends: 2544 [2021-04-15 03:31:31,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:31:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-04-15 03:31:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2328. [2021-04-15 03:31:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4894714224323162) internal successors, (5793), 2327 states have internal predecessors, (5793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5793 transitions. [2021-04-15 03:31:31,661 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5793 transitions. Word has length 32 [2021-04-15 03:31:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:31,661 INFO L480 AbstractCegarLoop]: Abstraction has 2328 states and 5793 transitions. [2021-04-15 03:31:31,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5793 transitions. [2021-04-15 03:31:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:31,663 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:31,663 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:31,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-04-15 03:31:31,863 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:31,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 189 times [2021-04-15 03:31:31,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:31,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295973484] [2021-04-15 03:31:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295973484] [2021-04-15 03:31:32,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295087287] [2021-04-15 03:31:32,107 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:32,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:31:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:32,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:32,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725447670] [2021-04-15 03:31:32,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:32,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:32,734 INFO L87 Difference]: Start difference. First operand 2328 states and 5793 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:33,550 INFO L93 Difference]: Finished difference Result 2550 states and 6328 transitions. [2021-04-15 03:31:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:33,566 INFO L225 Difference]: With dead ends: 2550 [2021-04-15 03:31:33,566 INFO L226 Difference]: Without dead ends: 2520 [2021-04-15 03:31:33,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1354.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-04-15 03:31:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2336. [2021-04-15 03:31:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.489507494646681) internal successors, (5813), 2335 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5813 transitions. [2021-04-15 03:31:33,586 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5813 transitions. Word has length 32 [2021-04-15 03:31:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:33,586 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 5813 transitions. [2021-04-15 03:31:33,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5813 transitions. [2021-04-15 03:31:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:33,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:33,588 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:33,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-04-15 03:31:33,788 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 190 times [2021-04-15 03:31:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:33,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678505710] [2021-04-15 03:31:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678505710] [2021-04-15 03:31:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892319929] [2021-04-15 03:31:34,075 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:34,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:34,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:34,615 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:34,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:34,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:34,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610375872] [2021-04-15 03:31:34,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:34,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:34,782 INFO L87 Difference]: Start difference. First operand 2336 states and 5813 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:35,892 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-04-15 03:31:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:31:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:35,895 INFO L225 Difference]: With dead ends: 2526 [2021-04-15 03:31:35,896 INFO L226 Difference]: Without dead ends: 2504 [2021-04-15 03:31:35,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:31:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-04-15 03:31:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2344. [2021-04-15 03:31:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 2.489543320529236) internal successors, (5833), 2343 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:35,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 5833 transitions. [2021-04-15 03:31:35,919 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 5833 transitions. Word has length 32 [2021-04-15 03:31:35,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:35,919 INFO L480 AbstractCegarLoop]: Abstraction has 2344 states and 5833 transitions. [2021-04-15 03:31:35,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:35,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 5833 transitions. [2021-04-15 03:31:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:35,921 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:35,921 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:36,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2783 [2021-04-15 03:31:36,121 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:36,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 191 times [2021-04-15 03:31:36,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:36,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872615536] [2021-04-15 03:31:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872615536] [2021-04-15 03:31:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465478789] [2021-04-15 03:31:36,427 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:36,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:31:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:31:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:36,914 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-04-15 03:31:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:37,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:37,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466091232] [2021-04-15 03:31:37,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:37,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:37,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:37,053 INFO L87 Difference]: Start difference. First operand 2344 states and 5833 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:37,837 INFO L93 Difference]: Finished difference Result 2550 states and 6332 transitions. [2021-04-15 03:31:37,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:37,842 INFO L225 Difference]: With dead ends: 2550 [2021-04-15 03:31:37,842 INFO L226 Difference]: Without dead ends: 2528 [2021-04-15 03:31:37,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1350.8ms TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:31:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-04-15 03:31:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2336. [2021-04-15 03:31:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.489507494646681) internal successors, (5813), 2335 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5813 transitions. [2021-04-15 03:31:37,865 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5813 transitions. Word has length 32 [2021-04-15 03:31:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:37,865 INFO L480 AbstractCegarLoop]: Abstraction has 2336 states and 5813 transitions. [2021-04-15 03:31:37,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5813 transitions. [2021-04-15 03:31:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:37,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:37,867 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:38,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2803,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:38,067 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1300556614, now seen corresponding path program 192 times [2021-04-15 03:31:38,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:38,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833782248] [2021-04-15 03:31:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:38,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833782248] [2021-04-15 03:31:38,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614954402] [2021-04-15 03:31:38,278 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:38,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:31:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181954347] [2021-04-15 03:31:38,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:38,839 INFO L87 Difference]: Start difference. First operand 2336 states and 5813 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:39,869 INFO L93 Difference]: Finished difference Result 2494 states and 6184 transitions. [2021-04-15 03:31:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:31:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:39,872 INFO L225 Difference]: With dead ends: 2494 [2021-04-15 03:31:39,872 INFO L226 Difference]: Without dead ends: 2456 [2021-04-15 03:31:39,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1318.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:31:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-04-15 03:31:39,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2352. [2021-04-15 03:31:39,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4895789025946407) internal successors, (5853), 2351 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5853 transitions. [2021-04-15 03:31:39,892 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5853 transitions. Word has length 32 [2021-04-15 03:31:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:39,892 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 5853 transitions. [2021-04-15 03:31:39,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5853 transitions. [2021-04-15 03:31:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:39,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:39,894 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:40,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2821,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:40,095 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash 279565882, now seen corresponding path program 193 times [2021-04-15 03:31:40,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:40,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750630955] [2021-04-15 03:31:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:40,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750630955] [2021-04-15 03:31:40,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026152520] [2021-04-15 03:31:40,361 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:40,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:40,900 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:41,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:41,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:41,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203906944] [2021-04-15 03:31:41,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:41,062 INFO L87 Difference]: Start difference. First operand 2352 states and 5853 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:42,044 INFO L93 Difference]: Finished difference Result 2582 states and 6408 transitions. [2021-04-15 03:31:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:42,048 INFO L225 Difference]: With dead ends: 2582 [2021-04-15 03:31:42,048 INFO L226 Difference]: Without dead ends: 2544 [2021-04-15 03:31:42,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1520.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-04-15 03:31:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2352. [2021-04-15 03:31:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4895789025946407) internal successors, (5853), 2351 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5853 transitions. [2021-04-15 03:31:42,071 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5853 transitions. Word has length 32 [2021-04-15 03:31:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:42,071 INFO L480 AbstractCegarLoop]: Abstraction has 2352 states and 5853 transitions. [2021-04-15 03:31:42,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5853 transitions. [2021-04-15 03:31:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:42,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:42,073 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:42,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2843 [2021-04-15 03:31:42,274 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:42,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:42,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1554708282, now seen corresponding path program 194 times [2021-04-15 03:31:42,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:42,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225179614] [2021-04-15 03:31:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225179614] [2021-04-15 03:31:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083724056] [2021-04-15 03:31:42,562 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:42,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:43,018 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:43,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:43,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:43,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039668156] [2021-04-15 03:31:43,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:43,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:43,170 INFO L87 Difference]: Start difference. First operand 2352 states and 5853 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:44,031 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-04-15 03:31:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:44,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:44,035 INFO L225 Difference]: With dead ends: 2526 [2021-04-15 03:31:44,035 INFO L226 Difference]: Without dead ends: 2488 [2021-04-15 03:31:44,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1349.0ms TimeCoverageRelationStatistics Valid=302, Invalid=1338, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-04-15 03:31:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2368. [2021-04-15 03:31:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-04-15 03:31:44,057 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-04-15 03:31:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:44,057 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-04-15 03:31:44,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-04-15 03:31:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:44,059 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:44,059 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:44,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:44,259 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash -176061450, now seen corresponding path program 195 times [2021-04-15 03:31:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:44,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732775322] [2021-04-15 03:31:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732775322] [2021-04-15 03:31:44,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639300819] [2021-04-15 03:31:44,473 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:44,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:31:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:44,937 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:31:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:45,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:45,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61287769] [2021-04-15 03:31:45,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:45,106 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:45,905 INFO L93 Difference]: Finished difference Result 2494 states and 6192 transitions. [2021-04-15 03:31:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:45,908 INFO L225 Difference]: With dead ends: 2494 [2021-04-15 03:31:45,908 INFO L226 Difference]: Without dead ends: 2472 [2021-04-15 03:31:45,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1260.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-04-15 03:31:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2360. [2021-04-15 03:31:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.4896142433234423) internal successors, (5873), 2359 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5873 transitions. [2021-04-15 03:31:45,931 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5873 transitions. Word has length 32 [2021-04-15 03:31:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:45,931 INFO L480 AbstractCegarLoop]: Abstraction has 2360 states and 5873 transitions. [2021-04-15 03:31:45,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5873 transitions. [2021-04-15 03:31:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:45,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:45,933 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:46,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2895 [2021-04-15 03:31:46,134 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -381999882, now seen corresponding path program 196 times [2021-04-15 03:31:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:46,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273876898] [2021-04-15 03:31:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:46,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273876898] [2021-04-15 03:31:46,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367877235] [2021-04-15 03:31:46,522 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:46,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:31:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:47,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:47,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:47,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689896837] [2021-04-15 03:31:47,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:47,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:47,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:47,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:47,030 INFO L87 Difference]: Start difference. First operand 2360 states and 5873 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:47,712 INFO L93 Difference]: Finished difference Result 2534 states and 6284 transitions. [2021-04-15 03:31:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:47,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:47,715 INFO L225 Difference]: With dead ends: 2534 [2021-04-15 03:31:47,716 INFO L226 Difference]: Without dead ends: 2496 [2021-04-15 03:31:47,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1009.1ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:31:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-04-15 03:31:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2368. [2021-04-15 03:31:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-04-15 03:31:47,737 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-04-15 03:31:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:47,737 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-04-15 03:31:47,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-04-15 03:31:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:47,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:47,739 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:47,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:47,940 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 197 times [2021-04-15 03:31:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:47,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724014450] [2021-04-15 03:31:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724014450] [2021-04-15 03:31:48,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531731004] [2021-04-15 03:31:48,214 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:48,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:31:48,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:48,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:31:48,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:48,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:48,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736243604] [2021-04-15 03:31:48,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:48,580 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:49,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:49,217 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-04-15 03:31:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:31:49,217 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:49,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:49,220 INFO L225 Difference]: With dead ends: 2470 [2021-04-15 03:31:49,220 INFO L226 Difference]: Without dead ends: 2440 [2021-04-15 03:31:49,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 951.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:31:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-04-15 03:31:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2360. [2021-04-15 03:31:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.4896142433234423) internal successors, (5873), 2359 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5873 transitions. [2021-04-15 03:31:49,243 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5873 transitions. Word has length 32 [2021-04-15 03:31:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:49,243 INFO L480 AbstractCegarLoop]: Abstraction has 2360 states and 5873 transitions. [2021-04-15 03:31:49,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5873 transitions. [2021-04-15 03:31:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:49,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:49,245 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:49,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-04-15 03:31:49,446 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 198 times [2021-04-15 03:31:49,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:49,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526423686] [2021-04-15 03:31:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526423686] [2021-04-15 03:31:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101525143] [2021-04-15 03:31:49,715 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:49,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:31:49,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:49,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:50,198 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 03:31:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:50,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:50,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543033002] [2021-04-15 03:31:50,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:50,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:50,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:50,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:50,377 INFO L87 Difference]: Start difference. First operand 2360 states and 5873 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:51,344 INFO L93 Difference]: Finished difference Result 2558 states and 6352 transitions. [2021-04-15 03:31:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:51,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:51,347 INFO L225 Difference]: With dead ends: 2558 [2021-04-15 03:31:51,347 INFO L226 Difference]: Without dead ends: 2536 [2021-04-15 03:31:51,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1451.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2021-04-15 03:31:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2376. [2021-04-15 03:31:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.489684210526316) internal successors, (5913), 2375 states have internal predecessors, (5913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 5913 transitions. [2021-04-15 03:31:51,376 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 5913 transitions. Word has length 32 [2021-04-15 03:31:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:51,376 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 5913 transitions. [2021-04-15 03:31:51,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 5913 transitions. [2021-04-15 03:31:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:51,378 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:51,378 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:51,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2946,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:51,581 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:51,582 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 199 times [2021-04-15 03:31:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:51,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082807085] [2021-04-15 03:31:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082807085] [2021-04-15 03:31:51,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204704616] [2021-04-15 03:31:51,770 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:52,258 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-04-15 03:31:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:52,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:52,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:52,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233371306] [2021-04-15 03:31:52,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:52,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:52,425 INFO L87 Difference]: Start difference. First operand 2376 states and 5913 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:53,434 INFO L93 Difference]: Finished difference Result 2590 states and 6432 transitions. [2021-04-15 03:31:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:53,438 INFO L225 Difference]: With dead ends: 2590 [2021-04-15 03:31:53,438 INFO L226 Difference]: Without dead ends: 2568 [2021-04-15 03:31:53,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1393.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:31:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-04-15 03:31:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2368. [2021-04-15 03:31:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.489649345162653) internal successors, (5893), 2367 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 5893 transitions. [2021-04-15 03:31:53,463 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 5893 transitions. Word has length 32 [2021-04-15 03:31:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 2368 states and 5893 transitions. [2021-04-15 03:31:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 5893 transitions. [2021-04-15 03:31:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:53,465 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:53,465 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:53,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2968,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:53,665 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 200 times [2021-04-15 03:31:53,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:53,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785123819] [2021-04-15 03:31:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:53,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785123819] [2021-04-15 03:31:53,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744807300] [2021-04-15 03:31:53,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:53,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:54,321 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 03:31:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:54,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:54,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:54,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472975781] [2021-04-15 03:31:54,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:54,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:54,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:54,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:54,579 INFO L87 Difference]: Start difference. First operand 2368 states and 5893 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:55,433 INFO L93 Difference]: Finished difference Result 2622 states and 6504 transitions. [2021-04-15 03:31:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:55,437 INFO L225 Difference]: With dead ends: 2622 [2021-04-15 03:31:55,438 INFO L226 Difference]: Without dead ends: 2584 [2021-04-15 03:31:55,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1316.0ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-04-15 03:31:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2392. [2021-04-15 03:31:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.4897532413216226) internal successors, (5953), 2391 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5953 transitions. [2021-04-15 03:31:55,461 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5953 transitions. Word has length 32 [2021-04-15 03:31:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:55,461 INFO L480 AbstractCegarLoop]: Abstraction has 2392 states and 5953 transitions. [2021-04-15 03:31:55,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5953 transitions. [2021-04-15 03:31:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:55,463 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:55,463 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:55,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2996 [2021-04-15 03:31:55,664 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 201 times [2021-04-15 03:31:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:55,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701872744] [2021-04-15 03:31:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:55,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701872744] [2021-04-15 03:31:55,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67098600] [2021-04-15 03:31:55,981 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:55,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:31:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:56,378 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 03:31:56,536 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 03:31:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:56,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:56,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989666317] [2021-04-15 03:31:56,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:56,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:56,702 INFO L87 Difference]: Start difference. First operand 2392 states and 5953 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:57,765 INFO L93 Difference]: Finished difference Result 2662 states and 6604 transitions. [2021-04-15 03:31:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:57,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:57,769 INFO L225 Difference]: With dead ends: 2662 [2021-04-15 03:31:57,769 INFO L226 Difference]: Without dead ends: 2624 [2021-04-15 03:31:57,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1587.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:31:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-04-15 03:31:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2384. [2021-04-15 03:31:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 2.4897188417960554) internal successors, (5933), 2383 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 5933 transitions. [2021-04-15 03:31:57,794 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 5933 transitions. Word has length 32 [2021-04-15 03:31:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:57,794 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 5933 transitions. [2021-04-15 03:31:57,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 5933 transitions. [2021-04-15 03:31:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:57,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:57,796 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:57,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3016,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:57,997 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 202 times [2021-04-15 03:31:57,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:57,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575873944] [2021-04-15 03:31:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575873944] [2021-04-15 03:31:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094454760] [2021-04-15 03:31:58,218 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:58,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:58,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:31:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:58,702 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 03:31:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:58,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:58,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:31:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322523183] [2021-04-15 03:31:58,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:31:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:31:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:58,882 INFO L87 Difference]: Start difference. First operand 2384 states and 5933 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:59,873 INFO L93 Difference]: Finished difference Result 2654 states and 6580 transitions. [2021-04-15 03:31:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:31:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:31:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:59,877 INFO L225 Difference]: With dead ends: 2654 [2021-04-15 03:31:59,877 INFO L226 Difference]: Without dead ends: 2608 [2021-04-15 03:31:59,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1448.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:31:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-04-15 03:31:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2408. [2021-04-15 03:31:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4898213543830496) internal successors, (5993), 2407 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5993 transitions. [2021-04-15 03:31:59,902 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5993 transitions. Word has length 32 [2021-04-15 03:31:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:59,902 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 5993 transitions. [2021-04-15 03:31:59,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5993 transitions. [2021-04-15 03:31:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:31:59,904 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:59,904 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:00,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-04-15 03:32:00,104 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 203 times [2021-04-15 03:32:00,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:00,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581621136] [2021-04-15 03:32:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581621136] [2021-04-15 03:32:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941538543] [2021-04-15 03:32:00,359 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:00,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:32:00,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:00,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:00,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:00,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822596016] [2021-04-15 03:32:00,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:00,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:00,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:00,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:00,933 INFO L87 Difference]: Start difference. First operand 2408 states and 5993 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:02,120 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-04-15 03:32:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:32:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:02,124 INFO L225 Difference]: With dead ends: 2598 [2021-04-15 03:32:02,124 INFO L226 Difference]: Without dead ends: 2568 [2021-04-15 03:32:02,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1450.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:32:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-04-15 03:32:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2400. [2021-04-15 03:32:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4897874114214256) internal successors, (5973), 2399 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5973 transitions. [2021-04-15 03:32:02,147 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5973 transitions. Word has length 32 [2021-04-15 03:32:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:02,147 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 5973 transitions. [2021-04-15 03:32:02,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5973 transitions. [2021-04-15 03:32:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:02,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:02,149 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:02,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-04-15 03:32:02,350 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:02,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 204 times [2021-04-15 03:32:02,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:02,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101443773] [2021-04-15 03:32:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:02,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101443773] [2021-04-15 03:32:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929826124] [2021-04-15 03:32:02,618 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:02,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:32:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:03,087 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-04-15 03:32:03,261 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 03:32:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:03,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:03,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:03,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199296969] [2021-04-15 03:32:03,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:03,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:03,513 INFO L87 Difference]: Start difference. First operand 2400 states and 5973 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:03,995 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 03:32:04,421 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 03:32:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:04,674 INFO L93 Difference]: Finished difference Result 2686 states and 6660 transitions. [2021-04-15 03:32:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:32:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:04,679 INFO L225 Difference]: With dead ends: 2686 [2021-04-15 03:32:04,679 INFO L226 Difference]: Without dead ends: 2640 [2021-04-15 03:32:04,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1848.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:32:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-04-15 03:32:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2400. [2021-04-15 03:32:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4897874114214256) internal successors, (5973), 2399 states have internal predecessors, (5973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5973 transitions. [2021-04-15 03:32:04,702 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5973 transitions. Word has length 32 [2021-04-15 03:32:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:04,702 INFO L480 AbstractCegarLoop]: Abstraction has 2400 states and 5973 transitions. [2021-04-15 03:32:04,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5973 transitions. [2021-04-15 03:32:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:04,704 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:04,704 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:04,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3081,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:04,905 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 205 times [2021-04-15 03:32:04,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:04,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842823425] [2021-04-15 03:32:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:05,133 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-04-15 03:32:05,384 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 10 [2021-04-15 03:32:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:05,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842823425] [2021-04-15 03:32:05,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927998649] [2021-04-15 03:32:05,491 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:06,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:06,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:06,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107451267] [2021-04-15 03:32:06,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:06,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:06,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:06,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:06,131 INFO L87 Difference]: Start difference. First operand 2400 states and 5973 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:06,839 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-04-15 03:32:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:32:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:06,842 INFO L225 Difference]: With dead ends: 2558 [2021-04-15 03:32:06,842 INFO L226 Difference]: Without dead ends: 2520 [2021-04-15 03:32:06,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1281.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:32:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-04-15 03:32:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2416. [2021-04-15 03:32:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4898550724637682) internal successors, (6013), 2415 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6013 transitions. [2021-04-15 03:32:06,860 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6013 transitions. Word has length 32 [2021-04-15 03:32:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:06,860 INFO L480 AbstractCegarLoop]: Abstraction has 2416 states and 6013 transitions. [2021-04-15 03:32:06,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6013 transitions. [2021-04-15 03:32:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:06,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:06,862 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:07,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3106,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:07,062 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:07,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 206 times [2021-04-15 03:32:07,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:07,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106560979] [2021-04-15 03:32:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106560979] [2021-04-15 03:32:07,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64234761] [2021-04-15 03:32:07,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:07,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:07,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:07,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:08,073 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 03:32:08,235 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 03:32:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:08,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:08,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:08,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866505338] [2021-04-15 03:32:08,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:08,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:08,430 INFO L87 Difference]: Start difference. First operand 2416 states and 6013 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:08,987 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 03:32:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:09,696 INFO L93 Difference]: Finished difference Result 2662 states and 6604 transitions. [2021-04-15 03:32:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:32:09,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:09,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:09,700 INFO L225 Difference]: With dead ends: 2662 [2021-04-15 03:32:09,700 INFO L226 Difference]: Without dead ends: 2624 [2021-04-15 03:32:09,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2055.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:32:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-04-15 03:32:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2424. [2021-04-15 03:32:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.489888567891044) internal successors, (6033), 2423 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6033 transitions. [2021-04-15 03:32:09,725 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6033 transitions. Word has length 32 [2021-04-15 03:32:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:09,725 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6033 transitions. [2021-04-15 03:32:09,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6033 transitions. [2021-04-15 03:32:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:09,728 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:09,728 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:09,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3129,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:09,929 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:09,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:09,929 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 207 times [2021-04-15 03:32:09,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:09,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991767824] [2021-04-15 03:32:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:10,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991767824] [2021-04-15 03:32:10,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647873155] [2021-04-15 03:32:10,251 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:10,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:32:10,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:10,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:10,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337345207] [2021-04-15 03:32:10,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:10,953 INFO L87 Difference]: Start difference. First operand 2424 states and 6033 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:12,000 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-04-15 03:32:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:32:12,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:12,004 INFO L225 Difference]: With dead ends: 2702 [2021-04-15 03:32:12,004 INFO L226 Difference]: Without dead ends: 2672 [2021-04-15 03:32:12,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:32:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-15 03:32:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2392. [2021-04-15 03:32:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.4897532413216226) internal successors, (5953), 2391 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5953 transitions. [2021-04-15 03:32:12,032 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5953 transitions. Word has length 32 [2021-04-15 03:32:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:12,032 INFO L480 AbstractCegarLoop]: Abstraction has 2392 states and 5953 transitions. [2021-04-15 03:32:12,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5953 transitions. [2021-04-15 03:32:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:12,034 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:12,034 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:12,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3146,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:12,235 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:12,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:12,235 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 208 times [2021-04-15 03:32:12,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:12,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076753621] [2021-04-15 03:32:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076753621] [2021-04-15 03:32:12,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268998315] [2021-04-15 03:32:12,567 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:12,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:12,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:13,149 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-04-15 03:32:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:13,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:13,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:13,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954937609] [2021-04-15 03:32:13,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:13,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:13,358 INFO L87 Difference]: Start difference. First operand 2392 states and 5953 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:13,758 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 03:32:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:14,456 INFO L93 Difference]: Finished difference Result 2654 states and 6584 transitions. [2021-04-15 03:32:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:32:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:14,460 INFO L225 Difference]: With dead ends: 2654 [2021-04-15 03:32:14,460 INFO L226 Difference]: Without dead ends: 2616 [2021-04-15 03:32:14,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1793.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:32:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-04-15 03:32:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-04-15 03:32:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4898213543830496) internal successors, (5993), 2407 states have internal predecessors, (5993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5993 transitions. [2021-04-15 03:32:14,483 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5993 transitions. Word has length 32 [2021-04-15 03:32:14,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:14,483 INFO L480 AbstractCegarLoop]: Abstraction has 2408 states and 5993 transitions. [2021-04-15 03:32:14,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5993 transitions. [2021-04-15 03:32:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:14,485 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:14,485 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:14,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:14,686 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 209 times [2021-04-15 03:32:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:14,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307098761] [2021-04-15 03:32:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:14,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307098761] [2021-04-15 03:32:14,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481557148] [2021-04-15 03:32:14,934 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:14,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:32:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:14,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:15,382 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-04-15 03:32:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:15,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:15,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:15,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249248361] [2021-04-15 03:32:15,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:15,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:15,645 INFO L87 Difference]: Start difference. First operand 2408 states and 5993 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:16,156 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 03:32:16,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:16,969 INFO L93 Difference]: Finished difference Result 2726 states and 6764 transitions. [2021-04-15 03:32:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:32:16,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:16,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:16,973 INFO L225 Difference]: With dead ends: 2726 [2021-04-15 03:32:16,973 INFO L226 Difference]: Without dead ends: 2688 [2021-04-15 03:32:16,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1796.7ms TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-04-15 03:32:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2416. [2021-04-15 03:32:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4898550724637682) internal successors, (6013), 2415 states have internal predecessors, (6013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6013 transitions. [2021-04-15 03:32:16,997 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6013 transitions. Word has length 32 [2021-04-15 03:32:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:16,997 INFO L480 AbstractCegarLoop]: Abstraction has 2416 states and 6013 transitions. [2021-04-15 03:32:16,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6013 transitions. [2021-04-15 03:32:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:16,999 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:16,999 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:17,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3175 [2021-04-15 03:32:17,199 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:17,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 210 times [2021-04-15 03:32:17,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:17,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914567008] [2021-04-15 03:32:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:17,448 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-04-15 03:32:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914567008] [2021-04-15 03:32:17,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133703598] [2021-04-15 03:32:17,624 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:17,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:32:17,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:18,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:18,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160158654] [2021-04-15 03:32:18,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:18,248 INFO L87 Difference]: Start difference. First operand 2416 states and 6013 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:18,630 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 03:32:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:19,482 INFO L93 Difference]: Finished difference Result 2766 states and 6868 transitions. [2021-04-15 03:32:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:32:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:19,486 INFO L225 Difference]: With dead ends: 2766 [2021-04-15 03:32:19,486 INFO L226 Difference]: Without dead ends: 2736 [2021-04-15 03:32:19,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1830.6ms TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-04-15 03:32:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2440. [2021-04-15 03:32:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4899548995489953) internal successors, (6073), 2439 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6073 transitions. [2021-04-15 03:32:19,511 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6073 transitions. Word has length 32 [2021-04-15 03:32:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:19,511 INFO L480 AbstractCegarLoop]: Abstraction has 2440 states and 6073 transitions. [2021-04-15 03:32:19,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6073 transitions. [2021-04-15 03:32:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:19,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:19,513 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:19,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-04-15 03:32:19,713 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 211 times [2021-04-15 03:32:19,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:19,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863533893] [2021-04-15 03:32:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:19,900 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-04-15 03:32:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:20,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863533893] [2021-04-15 03:32:20,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351406306] [2021-04-15 03:32:20,070 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:20,734 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 03:32:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:20,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:20,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251722696] [2021-04-15 03:32:20,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:20,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:20,921 INFO L87 Difference]: Start difference. First operand 2440 states and 6073 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:21,476 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-04-15 03:32:21,913 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-04-15 03:32:22,056 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 03:32:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:22,295 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-04-15 03:32:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:32:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:22,298 INFO L225 Difference]: With dead ends: 2622 [2021-04-15 03:32:22,298 INFO L226 Difference]: Without dead ends: 2600 [2021-04-15 03:32:22,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 2104.6ms TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:32:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-04-15 03:32:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2432. [2021-04-15 03:32:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.489921842863019) internal successors, (6053), 2431 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6053 transitions. [2021-04-15 03:32:22,319 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6053 transitions. Word has length 32 [2021-04-15 03:32:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:22,319 INFO L480 AbstractCegarLoop]: Abstraction has 2432 states and 6053 transitions. [2021-04-15 03:32:22,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6053 transitions. [2021-04-15 03:32:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:22,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:22,321 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:22,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:22,522 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 212 times [2021-04-15 03:32:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:22,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805569555] [2021-04-15 03:32:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805569555] [2021-04-15 03:32:22,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302227353] [2021-04-15 03:32:22,720 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:22,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:22,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:23,201 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-04-15 03:32:23,367 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 03:32:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:23,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:23,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:23,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827615641] [2021-04-15 03:32:23,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:23,548 INFO L87 Difference]: Start difference. First operand 2432 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:23,927 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 03:32:24,189 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-04-15 03:32:24,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:24,978 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-04-15 03:32:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:24,982 INFO L225 Difference]: With dead ends: 2718 [2021-04-15 03:32:24,982 INFO L226 Difference]: Without dead ends: 2680 [2021-04-15 03:32:24,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1974.9ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-04-15 03:32:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2440. [2021-04-15 03:32:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4899548995489953) internal successors, (6073), 2439 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6073 transitions. [2021-04-15 03:32:25,007 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6073 transitions. Word has length 32 [2021-04-15 03:32:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:25,007 INFO L480 AbstractCegarLoop]: Abstraction has 2440 states and 6073 transitions. [2021-04-15 03:32:25,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6073 transitions. [2021-04-15 03:32:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:25,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:25,009 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:25,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3235 [2021-04-15 03:32:25,210 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 213 times [2021-04-15 03:32:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:25,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224662378] [2021-04-15 03:32:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:25,455 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-04-15 03:32:25,672 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-04-15 03:32:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:25,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224662378] [2021-04-15 03:32:25,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634480860] [2021-04-15 03:32:25,764 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:25,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:32:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:25,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:26,295 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 03:32:26,492 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:32:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:26,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:26,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:26,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785523492] [2021-04-15 03:32:26,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:26,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:26,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:26,686 INFO L87 Difference]: Start difference. First operand 2440 states and 6073 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:27,235 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-04-15 03:32:27,630 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 03:32:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:27,815 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-04-15 03:32:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:32:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:27,819 INFO L225 Difference]: With dead ends: 2646 [2021-04-15 03:32:27,819 INFO L226 Difference]: Without dead ends: 2624 [2021-04-15 03:32:27,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 2108.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:32:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-04-15 03:32:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2432. [2021-04-15 03:32:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.489921842863019) internal successors, (6053), 2431 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6053 transitions. [2021-04-15 03:32:27,843 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6053 transitions. Word has length 32 [2021-04-15 03:32:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:27,843 INFO L480 AbstractCegarLoop]: Abstraction has 2432 states and 6053 transitions. [2021-04-15 03:32:27,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6053 transitions. [2021-04-15 03:32:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:27,845 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:27,845 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:28,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3259,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:28,046 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash 724018430, now seen corresponding path program 214 times [2021-04-15 03:32:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:28,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233744098] [2021-04-15 03:32:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:28,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233744098] [2021-04-15 03:32:28,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112602250] [2021-04-15 03:32:28,687 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:28,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:29,086 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:29,239 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-04-15 03:32:29,409 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 03:32:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:29,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:29,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:29,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847694570] [2021-04-15 03:32:29,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:29,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:29,599 INFO L87 Difference]: Start difference. First operand 2432 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:30,016 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 03:32:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:30,822 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-04-15 03:32:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:30,825 INFO L225 Difference]: With dead ends: 2718 [2021-04-15 03:32:30,825 INFO L226 Difference]: Without dead ends: 2680 [2021-04-15 03:32:30,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2029.5ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-04-15 03:32:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2464. [2021-04-15 03:32:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 2.4900527811611854) internal successors, (6133), 2463 states have internal predecessors, (6133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 6133 transitions. [2021-04-15 03:32:30,845 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 6133 transitions. Word has length 32 [2021-04-15 03:32:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:30,845 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 6133 transitions. [2021-04-15 03:32:30,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:30,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 6133 transitions. [2021-04-15 03:32:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:30,847 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:30,847 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:31,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3276,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:31,048 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash 367432762, now seen corresponding path program 215 times [2021-04-15 03:32:31,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:31,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008910064] [2021-04-15 03:32:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:31,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008910064] [2021-04-15 03:32:31,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909411229] [2021-04-15 03:32:31,450 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:31,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:32:31,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:31,813 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:32,126 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-04-15 03:32:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:32,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:32,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373616253] [2021-04-15 03:32:32,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:32,345 INFO L87 Difference]: Start difference. First operand 2464 states and 6133 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:32,693 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 03:32:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:33,677 INFO L93 Difference]: Finished difference Result 2630 states and 6524 transitions. [2021-04-15 03:32:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:32:33,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:33,680 INFO L225 Difference]: With dead ends: 2630 [2021-04-15 03:32:33,681 INFO L226 Difference]: Without dead ends: 2592 [2021-04-15 03:32:33,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2087.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:32:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-04-15 03:32:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2472. [2021-04-15 03:32:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-04-15 03:32:33,703 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-04-15 03:32:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:33,703 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-04-15 03:32:33,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-04-15 03:32:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:33,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:33,705 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:33,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-04-15 03:32:33,906 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1363336970, now seen corresponding path program 216 times [2021-04-15 03:32:33,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:33,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239552395] [2021-04-15 03:32:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:34,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239552395] [2021-04-15 03:32:34,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578074215] [2021-04-15 03:32:34,258 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:34,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:32:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:34,882 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-04-15 03:32:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:35,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:35,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:35,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029461600] [2021-04-15 03:32:35,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:35,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:35,046 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:36,125 INFO L93 Difference]: Finished difference Result 2590 states and 6432 transitions. [2021-04-15 03:32:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:36,129 INFO L225 Difference]: With dead ends: 2590 [2021-04-15 03:32:36,129 INFO L226 Difference]: Without dead ends: 2568 [2021-04-15 03:32:36,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1723.5ms TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-04-15 03:32:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2472. [2021-04-15 03:32:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-04-15 03:32:36,150 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-04-15 03:32:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:36,150 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-04-15 03:32:36,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-04-15 03:32:36,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:36,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:36,152 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:36,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:36,353 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1660823294, now seen corresponding path program 217 times [2021-04-15 03:32:36,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:36,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612618772] [2021-04-15 03:32:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:36,564 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 18 [2021-04-15 03:32:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:36,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612618772] [2021-04-15 03:32:36,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117496857] [2021-04-15 03:32:36,776 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:37,123 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:37,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:37,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:37,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485795762] [2021-04-15 03:32:37,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:37,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:37,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:37,470 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,290 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 03:32:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:38,720 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-04-15 03:32:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:38,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:38,724 INFO L225 Difference]: With dead ends: 2710 [2021-04-15 03:32:38,724 INFO L226 Difference]: Without dead ends: 2680 [2021-04-15 03:32:38,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1846.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:32:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-04-15 03:32:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2488. [2021-04-15 03:32:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4901487736228387) internal successors, (6193), 2487 states have internal predecessors, (6193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6193 transitions. [2021-04-15 03:32:38,747 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6193 transitions. Word has length 32 [2021-04-15 03:32:38,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:38,747 INFO L480 AbstractCegarLoop]: Abstraction has 2488 states and 6193 transitions. [2021-04-15 03:32:38,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6193 transitions. [2021-04-15 03:32:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:38,749 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:38,749 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:38,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-04-15 03:32:38,950 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 218 times [2021-04-15 03:32:38,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:38,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924779358] [2021-04-15 03:32:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:39,539 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-04-15 03:32:40,168 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-04-15 03:32:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:40,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924779358] [2021-04-15 03:32:40,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14157945] [2021-04-15 03:32:40,374 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:40,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:40,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:40,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:40,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:40,750 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051432856] [2021-04-15 03:32:41,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:41,178 INFO L87 Difference]: Start difference. First operand 2488 states and 6193 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:41,734 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-04-15 03:32:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:42,576 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-04-15 03:32:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:32:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:42,579 INFO L225 Difference]: With dead ends: 2718 [2021-04-15 03:32:42,579 INFO L226 Difference]: Without dead ends: 2688 [2021-04-15 03:32:42,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2166.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:32:42,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-04-15 03:32:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2480. [2021-04-15 03:32:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.490116982654296) internal successors, (6173), 2479 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6173 transitions. [2021-04-15 03:32:42,602 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6173 transitions. Word has length 32 [2021-04-15 03:32:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:42,603 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 6173 transitions. [2021-04-15 03:32:42,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6173 transitions. [2021-04-15 03:32:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:42,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:42,605 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:42,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3347,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:42,805 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 219 times [2021-04-15 03:32:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:42,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655565602] [2021-04-15 03:32:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655565602] [2021-04-15 03:32:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087736546] [2021-04-15 03:32:43,105 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:43,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:32:43,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:43,485 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:43,810 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 03:32:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:43,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:43,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:43,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400802515] [2021-04-15 03:32:43,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:43,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:43,989 INFO L87 Difference]: Start difference. First operand 2480 states and 6173 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:44,207 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 24 [2021-04-15 03:32:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:45,271 INFO L93 Difference]: Finished difference Result 2782 states and 6912 transitions. [2021-04-15 03:32:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:32:45,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:45,276 INFO L225 Difference]: With dead ends: 2782 [2021-04-15 03:32:45,276 INFO L226 Difference]: Without dead ends: 2752 [2021-04-15 03:32:45,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1909.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:32:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-04-15 03:32:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2472. [2021-04-15 03:32:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-04-15 03:32:45,303 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-04-15 03:32:45,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:45,304 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-04-15 03:32:45,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-04-15 03:32:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:45,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:45,306 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:45,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3369 [2021-04-15 03:32:45,506 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -614222406, now seen corresponding path program 220 times [2021-04-15 03:32:45,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:45,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817621849] [2021-04-15 03:32:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:45,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817621849] [2021-04-15 03:32:45,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132463118] [2021-04-15 03:32:45,908 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:45,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:45,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:45,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:46,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 03:32:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:46,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:46,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:46,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185145395] [2021-04-15 03:32:46,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:46,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:46,695 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:47,065 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 03:32:48,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:48,273 INFO L93 Difference]: Finished difference Result 2814 states and 6988 transitions. [2021-04-15 03:32:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:32:48,274 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:48,277 INFO L225 Difference]: With dead ends: 2814 [2021-04-15 03:32:48,277 INFO L226 Difference]: Without dead ends: 2784 [2021-04-15 03:32:48,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 2248.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 03:32:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-04-15 03:32:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2472. [2021-04-15 03:32:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.490084985835694) internal successors, (6153), 2471 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6153 transitions. [2021-04-15 03:32:48,300 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6153 transitions. Word has length 32 [2021-04-15 03:32:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:48,300 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 6153 transitions. [2021-04-15 03:32:48,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6153 transitions. [2021-04-15 03:32:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:48,302 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:48,302 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:48,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-04-15 03:32:48,502 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 221 times [2021-04-15 03:32:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:48,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049522446] [2021-04-15 03:32:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049522446] [2021-04-15 03:32:49,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846990177] [2021-04-15 03:32:49,015 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:49,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:32:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:49,567 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 03:32:49,786 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:32:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:50,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:50,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318566390] [2021-04-15 03:32:50,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:50,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:50,030 INFO L87 Difference]: Start difference. First operand 2472 states and 6153 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:50,477 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 03:32:51,118 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 03:32:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:51,802 INFO L93 Difference]: Finished difference Result 2790 states and 6928 transitions. [2021-04-15 03:32:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:32:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:51,807 INFO L225 Difference]: With dead ends: 2790 [2021-04-15 03:32:51,807 INFO L226 Difference]: Without dead ends: 2760 [2021-04-15 03:32:51,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2684.8ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:32:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-04-15 03:32:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2480. [2021-04-15 03:32:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.490116982654296) internal successors, (6173), 2479 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6173 transitions. [2021-04-15 03:32:51,831 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6173 transitions. Word has length 32 [2021-04-15 03:32:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:51,831 INFO L480 AbstractCegarLoop]: Abstraction has 2480 states and 6173 transitions. [2021-04-15 03:32:51,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6173 transitions. [2021-04-15 03:32:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:51,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:51,833 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:52,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3406,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:52,034 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -188856194, now seen corresponding path program 222 times [2021-04-15 03:32:52,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:52,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474791789] [2021-04-15 03:32:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:52,287 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 22 [2021-04-15 03:32:52,773 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 12 [2021-04-15 03:32:53,571 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 27 [2021-04-15 03:32:54,000 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 11 [2021-04-15 03:32:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:54,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474791789] [2021-04-15 03:32:54,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282116229] [2021-04-15 03:32:54,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:54,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:32:54,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:54,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:54,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:54,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114382040] [2021-04-15 03:32:54,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:54,830 INFO L87 Difference]: Start difference. First operand 2480 states and 6173 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:55,905 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-04-15 03:32:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:56,117 INFO L93 Difference]: Finished difference Result 2726 states and 6764 transitions. [2021-04-15 03:32:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:32:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:56,121 INFO L225 Difference]: With dead ends: 2726 [2021-04-15 03:32:56,121 INFO L226 Difference]: Without dead ends: 2688 [2021-04-15 03:32:56,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1647.6ms TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:32:56,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-04-15 03:32:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2504. [2021-04-15 03:32:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4902117459049142) internal successors, (6233), 2503 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6233 transitions. [2021-04-15 03:32:56,144 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6233 transitions. Word has length 32 [2021-04-15 03:32:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:56,144 INFO L480 AbstractCegarLoop]: Abstraction has 2504 states and 6233 transitions. [2021-04-15 03:32:56,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6233 transitions. [2021-04-15 03:32:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:56,146 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:56,146 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:56,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-04-15 03:32:56,346 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 223 times [2021-04-15 03:32:56,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:56,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169827857] [2021-04-15 03:32:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169827857] [2021-04-15 03:32:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767892506] [2021-04-15 03:32:56,691 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:56,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:57,175 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 03:32:57,396 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:32:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:57,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:57,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:32:57,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518460761] [2021-04-15 03:32:57,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:32:57,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:57,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:32:57,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:32:57,640 INFO L87 Difference]: Start difference. First operand 2504 states and 6233 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:57,840 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 03:32:58,737 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 03:32:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:59,175 INFO L93 Difference]: Finished difference Result 2742 states and 6800 transitions. [2021-04-15 03:32:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:32:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:32:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:59,179 INFO L225 Difference]: With dead ends: 2742 [2021-04-15 03:32:59,180 INFO L226 Difference]: Without dead ends: 2696 [2021-04-15 03:32:59,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2217.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:32:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-04-15 03:32:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2528. [2021-04-15 03:32:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-04-15 03:32:59,205 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-04-15 03:32:59,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:59,205 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-04-15 03:32:59,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-04-15 03:32:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:32:59,208 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:59,208 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:59,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:59,408 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 919634934, now seen corresponding path program 224 times [2021-04-15 03:32:59,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:59,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944763233] [2021-04-15 03:32:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:59,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944763233] [2021-04-15 03:32:59,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290920173] [2021-04-15 03:32:59,789 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:59,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:32:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:00,341 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:33:00,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:00,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:00,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:00,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916802184] [2021-04-15 03:33:00,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:00,538 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:00,780 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 03:33:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:01,886 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-04-15 03:33:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:33:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:01,891 INFO L225 Difference]: With dead ends: 2718 [2021-04-15 03:33:01,891 INFO L226 Difference]: Without dead ends: 2696 [2021-04-15 03:33:01,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1951.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:33:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-04-15 03:33:01,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2520. [2021-04-15 03:33:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4902739182215163) internal successors, (6273), 2519 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6273 transitions. [2021-04-15 03:33:01,914 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6273 transitions. Word has length 32 [2021-04-15 03:33:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:01,914 INFO L480 AbstractCegarLoop]: Abstraction has 2520 states and 6273 transitions. [2021-04-15 03:33:01,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6273 transitions. [2021-04-15 03:33:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:01,917 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:01,917 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:02,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3467 [2021-04-15 03:33:02,117 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 225 times [2021-04-15 03:33:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:02,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804841793] [2021-04-15 03:33:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804841793] [2021-04-15 03:33:02,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385692704] [2021-04-15 03:33:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:02,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:33:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:02,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:02,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:03,099 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 03:33:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:03,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:03,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588080440] [2021-04-15 03:33:03,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:03,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:03,324 INFO L87 Difference]: Start difference. First operand 2520 states and 6273 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:03,533 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-04-15 03:33:04,332 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-04-15 03:33:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:04,653 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-04-15 03:33:04,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:33:04,654 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:04,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:04,657 INFO L225 Difference]: With dead ends: 2742 [2021-04-15 03:33:04,657 INFO L226 Difference]: Without dead ends: 2704 [2021-04-15 03:33:04,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1933.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:33:04,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-04-15 03:33:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2536. [2021-04-15 03:33:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 2.490335305719921) internal successors, (6313), 2535 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 6313 transitions. [2021-04-15 03:33:04,682 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 6313 transitions. Word has length 32 [2021-04-15 03:33:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:04,682 INFO L480 AbstractCegarLoop]: Abstraction has 2536 states and 6313 transitions. [2021-04-15 03:33:04,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 6313 transitions. [2021-04-15 03:33:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:04,684 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:04,684 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:04,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3484 [2021-04-15 03:33:04,884 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:04,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 226 times [2021-04-15 03:33:04,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:04,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946624478] [2021-04-15 03:33:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:05,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946624478] [2021-04-15 03:33:05,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326086211] [2021-04-15 03:33:05,313 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:05,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:33:05,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:05,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:06,002 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 03:33:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:06,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:06,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532644551] [2021-04-15 03:33:06,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:06,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:06,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:06,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:06,231 INFO L87 Difference]: Start difference. First operand 2536 states and 6313 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:07,492 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-04-15 03:33:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:33:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:07,495 INFO L225 Difference]: With dead ends: 2702 [2021-04-15 03:33:07,495 INFO L226 Difference]: Without dead ends: 2680 [2021-04-15 03:33:07,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1972.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:33:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-04-15 03:33:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2520. [2021-04-15 03:33:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4902739182215163) internal successors, (6273), 2519 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6273 transitions. [2021-04-15 03:33:07,517 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6273 transitions. Word has length 32 [2021-04-15 03:33:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:07,517 INFO L480 AbstractCegarLoop]: Abstraction has 2520 states and 6273 transitions. [2021-04-15 03:33:07,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6273 transitions. [2021-04-15 03:33:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:07,519 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:07,519 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:07,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:07,719 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 227 times [2021-04-15 03:33:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822648467] [2021-04-15 03:33:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:08,049 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-04-15 03:33:08,606 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 10 [2021-04-15 03:33:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822648467] [2021-04-15 03:33:08,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468501813] [2021-04-15 03:33:08,779 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:08,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:33:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:09,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:09,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:09,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098656793] [2021-04-15 03:33:09,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:09,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:09,502 INFO L87 Difference]: Start difference. First operand 2520 states and 6273 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:10,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:10,604 INFO L93 Difference]: Finished difference Result 2734 states and 6784 transitions. [2021-04-15 03:33:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:33:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:10,609 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 03:33:10,609 INFO L226 Difference]: Without dead ends: 2696 [2021-04-15 03:33:10,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1580.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:33:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-04-15 03:33:10,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2528. [2021-04-15 03:33:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-04-15 03:33:10,639 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-04-15 03:33:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:10,639 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-04-15 03:33:10,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-04-15 03:33:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:10,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:10,642 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:10,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3519,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:10,842 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 228 times [2021-04-15 03:33:10,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:10,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356084637] [2021-04-15 03:33:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:11,364 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-04-15 03:33:11,487 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 16 [2021-04-15 03:33:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356084637] [2021-04-15 03:33:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389069722] [2021-04-15 03:33:11,640 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:11,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:33:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:12,312 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 03:33:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:12,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:12,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739903936] [2021-04-15 03:33:12,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:12,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:12,542 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:13,453 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-04-15 03:33:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:13,688 INFO L93 Difference]: Finished difference Result 2814 states and 6988 transitions. [2021-04-15 03:33:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:33:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:13,693 INFO L225 Difference]: With dead ends: 2814 [2021-04-15 03:33:13,693 INFO L226 Difference]: Without dead ends: 2784 [2021-04-15 03:33:13,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1937.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:33:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-04-15 03:33:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2512. [2021-04-15 03:33:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.490242931103146) internal successors, (6253), 2511 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 6253 transitions. [2021-04-15 03:33:13,718 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 6253 transitions. Word has length 32 [2021-04-15 03:33:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:13,718 INFO L480 AbstractCegarLoop]: Abstraction has 2512 states and 6253 transitions. [2021-04-15 03:33:13,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 6253 transitions. [2021-04-15 03:33:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:13,720 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:13,720 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:13,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-04-15 03:33:13,925 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash -726005898, now seen corresponding path program 229 times [2021-04-15 03:33:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:13,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725688719] [2021-04-15 03:33:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725688719] [2021-04-15 03:33:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41277947] [2021-04-15 03:33:14,207 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:33:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:14,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:14,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:14,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184654633] [2021-04-15 03:33:14,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:14,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:14,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:14,812 INFO L87 Difference]: Start difference. First operand 2512 states and 6253 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:15,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:15,638 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-04-15 03:33:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:33:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:15,642 INFO L225 Difference]: With dead ends: 2622 [2021-04-15 03:33:15,642 INFO L226 Difference]: Without dead ends: 2600 [2021-04-15 03:33:15,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1217.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:33:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-04-15 03:33:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2512. [2021-04-15 03:33:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.490242931103146) internal successors, (6253), 2511 states have internal predecessors, (6253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 6253 transitions. [2021-04-15 03:33:15,668 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 6253 transitions. Word has length 32 [2021-04-15 03:33:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:15,668 INFO L480 AbstractCegarLoop]: Abstraction has 2512 states and 6253 transitions. [2021-04-15 03:33:15,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 6253 transitions. [2021-04-15 03:33:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:15,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:15,671 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:15,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:15,871 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:15,871 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 230 times [2021-04-15 03:33:15,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:15,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71216153] [2021-04-15 03:33:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:16,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71216153] [2021-04-15 03:33:16,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895292871] [2021-04-15 03:33:16,156 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:33:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:16,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:16,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:16,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549913660] [2021-04-15 03:33:16,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:16,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:16,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:16,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:16,910 INFO L87 Difference]: Start difference. First operand 2512 states and 6253 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:17,842 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-04-15 03:33:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:33:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:17,845 INFO L225 Difference]: With dead ends: 2702 [2021-04-15 03:33:17,846 INFO L226 Difference]: Without dead ends: 2672 [2021-04-15 03:33:17,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1509.9ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:33:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-04-15 03:33:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2528. [2021-04-15 03:33:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.490304709141274) internal successors, (6293), 2527 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6293 transitions. [2021-04-15 03:33:17,868 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6293 transitions. Word has length 32 [2021-04-15 03:33:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:17,868 INFO L480 AbstractCegarLoop]: Abstraction has 2528 states and 6293 transitions. [2021-04-15 03:33:17,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6293 transitions. [2021-04-15 03:33:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:17,870 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:17,870 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:18,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-04-15 03:33:18,071 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1873094462, now seen corresponding path program 231 times [2021-04-15 03:33:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:18,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417387980] [2021-04-15 03:33:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:18,755 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-04-15 03:33:18,882 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2021-04-15 03:33:25,402 WARN L205 SmtUtils]: Spent 6.52 s on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-04-15 03:33:25,578 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2021-04-15 03:33:32,830 WARN L205 SmtUtils]: Spent 7.25 s on a formula simplification. DAG size of input: 76 DAG size of output: 18 [2021-04-15 03:33:37,320 WARN L205 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2021-04-15 03:33:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417387980] [2021-04-15 03:33:37,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392708064] [2021-04-15 03:33:37,514 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:37,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:33:37,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:38,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:38,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:38,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111835443] [2021-04-15 03:33:38,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:38,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:38,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:38,096 INFO L87 Difference]: Start difference. First operand 2528 states and 6293 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:39,536 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-04-15 03:33:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:33:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:39,539 INFO L225 Difference]: With dead ends: 2742 [2021-04-15 03:33:39,539 INFO L226 Difference]: Without dead ends: 2712 [2021-04-15 03:33:39,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2117.0ms TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 03:33:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-04-15 03:33:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2552. [2021-04-15 03:33:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.490395923167385) internal successors, (6353), 2551 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6353 transitions. [2021-04-15 03:33:39,560 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6353 transitions. Word has length 32 [2021-04-15 03:33:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:39,561 INFO L480 AbstractCegarLoop]: Abstraction has 2552 states and 6353 transitions. [2021-04-15 03:33:39,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6353 transitions. [2021-04-15 03:33:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:39,562 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:39,562 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:39,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3583,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:39,763 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -663644998, now seen corresponding path program 232 times [2021-04-15 03:33:39,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:39,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168414900] [2021-04-15 03:33:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:40,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168414900] [2021-04-15 03:33:40,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182322570] [2021-04-15 03:33:40,032 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:40,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:33:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:40,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:40,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440462027] [2021-04-15 03:33:40,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:40,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:40,663 INFO L87 Difference]: Start difference. First operand 2552 states and 6353 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:41,935 INFO L93 Difference]: Finished difference Result 2846 states and 7064 transitions. [2021-04-15 03:33:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:33:41,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:41,939 INFO L225 Difference]: With dead ends: 2846 [2021-04-15 03:33:41,939 INFO L226 Difference]: Without dead ends: 2800 [2021-04-15 03:33:41,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1761.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:33:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-04-15 03:33:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2552. [2021-04-15 03:33:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.490395923167385) internal successors, (6353), 2551 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6353 transitions. [2021-04-15 03:33:41,961 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6353 transitions. Word has length 32 [2021-04-15 03:33:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:41,961 INFO L480 AbstractCegarLoop]: Abstraction has 2552 states and 6353 transitions. [2021-04-15 03:33:41,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6353 transitions. [2021-04-15 03:33:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:41,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:41,963 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:42,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3607 [2021-04-15 03:33:42,164 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 233 times [2021-04-15 03:33:42,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:42,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007040885] [2021-04-15 03:33:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:42,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007040885] [2021-04-15 03:33:42,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853484478] [2021-04-15 03:33:42,527 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:42,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:33:42,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:42,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:43,038 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-04-15 03:33:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:43,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:43,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:43,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834203174] [2021-04-15 03:33:43,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:43,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:43,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:43,214 INFO L87 Difference]: Start difference. First operand 2552 states and 6353 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:43,976 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 03:33:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:44,374 INFO L93 Difference]: Finished difference Result 2862 states and 7104 transitions. [2021-04-15 03:33:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:33:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:44,377 INFO L225 Difference]: With dead ends: 2862 [2021-04-15 03:33:44,377 INFO L226 Difference]: Without dead ends: 2824 [2021-04-15 03:33:44,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1735.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:33:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-04-15 03:33:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2568. [2021-04-15 03:33:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.490455784962992) internal successors, (6393), 2567 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6393 transitions. [2021-04-15 03:33:44,401 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6393 transitions. Word has length 32 [2021-04-15 03:33:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:44,401 INFO L480 AbstractCegarLoop]: Abstraction has 2568 states and 6393 transitions. [2021-04-15 03:33:44,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6393 transitions. [2021-04-15 03:33:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:44,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:44,403 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:44,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3624 [2021-04-15 03:33:44,604 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 234 times [2021-04-15 03:33:44,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:44,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005835653] [2021-04-15 03:33:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:45,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005835653] [2021-04-15 03:33:45,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324920596] [2021-04-15 03:33:45,082 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:45,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:33:45,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:45,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:45,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:45,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507509450] [2021-04-15 03:33:45,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:45,676 INFO L87 Difference]: Start difference. First operand 2568 states and 6393 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:46,863 INFO L93 Difference]: Finished difference Result 2870 states and 7124 transitions. [2021-04-15 03:33:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:33:46,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:46,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:46,867 INFO L225 Difference]: With dead ends: 2870 [2021-04-15 03:33:46,867 INFO L226 Difference]: Without dead ends: 2832 [2021-04-15 03:33:46,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1634.2ms TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:33:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-04-15 03:33:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2576. [2021-04-15 03:33:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.490485436893204) internal successors, (6413), 2575 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6413 transitions. [2021-04-15 03:33:46,899 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6413 transitions. Word has length 32 [2021-04-15 03:33:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:46,899 INFO L480 AbstractCegarLoop]: Abstraction has 2576 states and 6413 transitions. [2021-04-15 03:33:46,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6413 transitions. [2021-04-15 03:33:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:46,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:46,901 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:47,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3647,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:47,101 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 235 times [2021-04-15 03:33:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:47,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247135721] [2021-04-15 03:33:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:47,321 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-04-15 03:33:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247135721] [2021-04-15 03:33:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131010211] [2021-04-15 03:33:47,423 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:47,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:48,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:48,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:48,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267251580] [2021-04-15 03:33:48,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:48,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:48,004 INFO L87 Difference]: Start difference. First operand 2576 states and 6413 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:49,040 INFO L93 Difference]: Finished difference Result 2870 states and 7128 transitions. [2021-04-15 03:33:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:33:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:49,044 INFO L225 Difference]: With dead ends: 2870 [2021-04-15 03:33:49,044 INFO L226 Difference]: Without dead ends: 2840 [2021-04-15 03:33:49,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1494.9ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:33:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-04-15 03:33:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2584. [2021-04-15 03:33:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 2.4905149051490514) internal successors, (6433), 2583 states have internal predecessors, (6433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 6433 transitions. [2021-04-15 03:33:49,065 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 6433 transitions. Word has length 32 [2021-04-15 03:33:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:49,065 INFO L480 AbstractCegarLoop]: Abstraction has 2584 states and 6433 transitions. [2021-04-15 03:33:49,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 6433 transitions. [2021-04-15 03:33:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:49,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:49,067 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:49,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3668,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:49,268 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 236 times [2021-04-15 03:33:49,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:49,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026281702] [2021-04-15 03:33:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026281702] [2021-04-15 03:33:49,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023148657] [2021-04-15 03:33:49,754 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:49,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:33:49,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:49,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:50,267 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-04-15 03:33:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:50,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:50,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:50,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977716206] [2021-04-15 03:33:50,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:50,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:50,407 INFO L87 Difference]: Start difference. First operand 2584 states and 6433 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:51,405 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-04-15 03:33:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:33:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:51,409 INFO L225 Difference]: With dead ends: 2822 [2021-04-15 03:33:51,409 INFO L226 Difference]: Without dead ends: 2792 [2021-04-15 03:33:51,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1594.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:33:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-04-15 03:33:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2576. [2021-04-15 03:33:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.490485436893204) internal successors, (6413), 2575 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6413 transitions. [2021-04-15 03:33:51,430 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6413 transitions. Word has length 32 [2021-04-15 03:33:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:51,430 INFO L480 AbstractCegarLoop]: Abstraction has 2576 states and 6413 transitions. [2021-04-15 03:33:51,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6413 transitions. [2021-04-15 03:33:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:51,432 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:51,432 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:51,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3689 [2021-04-15 03:33:51,632 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 237 times [2021-04-15 03:33:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:51,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834128005] [2021-04-15 03:33:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:52,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834128005] [2021-04-15 03:33:52,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903603988] [2021-04-15 03:33:52,067 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:52,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:33:52,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:52,609 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:33:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:52,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:52,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:52,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117956623] [2021-04-15 03:33:52,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:52,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:52,767 INFO L87 Difference]: Start difference. First operand 2576 states and 6413 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:53,291 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-04-15 03:33:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:54,014 INFO L93 Difference]: Finished difference Result 2862 states and 7112 transitions. [2021-04-15 03:33:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:33:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:54,018 INFO L225 Difference]: With dead ends: 2862 [2021-04-15 03:33:54,018 INFO L226 Difference]: Without dead ends: 2840 [2021-04-15 03:33:54,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1955.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:33:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-04-15 03:33:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2592. [2021-04-15 03:33:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.4905441914318796) internal successors, (6453), 2591 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 6453 transitions. [2021-04-15 03:33:54,040 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 6453 transitions. Word has length 32 [2021-04-15 03:33:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:54,040 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 6453 transitions. [2021-04-15 03:33:54,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 6453 transitions. [2021-04-15 03:33:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:54,042 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:54,042 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:54,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3712,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:54,243 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:54,243 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 238 times [2021-04-15 03:33:54,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:54,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390435891] [2021-04-15 03:33:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390435891] [2021-04-15 03:33:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598166998] [2021-04-15 03:33:54,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:54,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:33:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:33:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:55,039 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-04-15 03:33:55,177 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 03:33:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:55,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:55,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:33:55,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697159595] [2021-04-15 03:33:55,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:55,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:55,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:55,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:55,334 INFO L87 Difference]: Start difference. First operand 2592 states and 6453 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:55,711 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-04-15 03:33:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:56,363 INFO L93 Difference]: Finished difference Result 2846 states and 7072 transitions. [2021-04-15 03:33:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:33:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:33:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:56,367 INFO L225 Difference]: With dead ends: 2846 [2021-04-15 03:33:56,367 INFO L226 Difference]: Without dead ends: 2824 [2021-04-15 03:33:56,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1729.3ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:33:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-04-15 03:33:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2592. [2021-04-15 03:33:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 2.4905441914318796) internal successors, (6453), 2591 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 6453 transitions. [2021-04-15 03:33:56,389 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 6453 transitions. Word has length 32 [2021-04-15 03:33:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:56,389 INFO L480 AbstractCegarLoop]: Abstraction has 2592 states and 6453 transitions. [2021-04-15 03:33:56,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 6453 transitions. [2021-04-15 03:33:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:33:56,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:56,391 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:56,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3732 [2021-04-15 03:33:56,591 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 239 times [2021-04-15 03:33:56,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:56,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400909921] [2021-04-15 03:33:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:57,398 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 12 [2021-04-15 03:33:58,412 WARN L205 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2021-04-15 03:34:00,848 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 64 DAG size of output: 24 [2021-04-15 03:34:01,741 WARN L205 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 13 [2021-04-15 03:34:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400909921] [2021-04-15 03:34:01,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438977262] [2021-04-15 03:34:01,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:01,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:34:01,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:01,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:34:01,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:02,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:02,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:34:02,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358459401] [2021-04-15 03:34:02,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:34:02,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:34:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:34:02,387 INFO L87 Difference]: Start difference. First operand 2592 states and 6453 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:03,228 INFO L93 Difference]: Finished difference Result 2830 states and 7024 transitions. [2021-04-15 03:34:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:34:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:34:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:03,231 INFO L225 Difference]: With dead ends: 2830 [2021-04-15 03:34:03,231 INFO L226 Difference]: Without dead ends: 2792 [2021-04-15 03:34:03,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1260.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:34:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-04-15 03:34:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2608. [2021-04-15 03:34:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 2.49060222477944) internal successors, (6493), 2607 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 6493 transitions. [2021-04-15 03:34:03,254 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 6493 transitions. Word has length 32 [2021-04-15 03:34:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:03,254 INFO L480 AbstractCegarLoop]: Abstraction has 2608 states and 6493 transitions. [2021-04-15 03:34:03,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 6493 transitions. [2021-04-15 03:34:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:34:03,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:03,256 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:03,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3747,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:03,456 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 240 times [2021-04-15 03:34:03,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:03,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779326358] [2021-04-15 03:34:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:03,835 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 12 [2021-04-15 03:34:04,183 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-04-15 03:34:04,809 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 18 [2021-04-15 03:34:05,465 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 14 [2021-04-15 03:34:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:05,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779326358] [2021-04-15 03:34:05,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851922541] [2021-04-15 03:34:05,551 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:05,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:34:05,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:34:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:06,016 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-04-15 03:34:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:06,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:06,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:34:06,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328412648] [2021-04-15 03:34:06,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:34:06,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:06,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:34:06,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:34:06,157 INFO L87 Difference]: Start difference. First operand 2608 states and 6493 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:07,004 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-04-15 03:34:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:34:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:34:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:07,008 INFO L225 Difference]: With dead ends: 2782 [2021-04-15 03:34:07,008 INFO L226 Difference]: Without dead ends: 2752 [2021-04-15 03:34:07,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1226.4ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:34:07,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-04-15 03:34:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 2616. [2021-04-15 03:34:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4906309751434033) internal successors, (6513), 2615 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6513 transitions. [2021-04-15 03:34:07,030 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6513 transitions. Word has length 32 [2021-04-15 03:34:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:07,030 INFO L480 AbstractCegarLoop]: Abstraction has 2616 states and 6513 transitions. [2021-04-15 03:34:07,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6513 transitions. [2021-04-15 03:34:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:34:07,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:07,032 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:07,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3764,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:07,232 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:07,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 241 times [2021-04-15 03:34:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:07,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482025501] [2021-04-15 03:34:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482025501] [2021-04-15 03:34:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823621213] [2021-04-15 03:34:07,437 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:07,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:34:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:07,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:07,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:34:07,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557359716] [2021-04-15 03:34:07,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:34:07,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:34:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:34:07,957 INFO L87 Difference]: Start difference. First operand 2616 states and 6513 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:09,271 INFO L93 Difference]: Finished difference Result 2894 states and 7188 transitions. [2021-04-15 03:34:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:34:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:34:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:09,288 INFO L225 Difference]: With dead ends: 2894 [2021-04-15 03:34:09,288 INFO L226 Difference]: Without dead ends: 2864 [2021-04-15 03:34:09,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1604.2ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 03:34:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-04-15 03:34:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2624. [2021-04-15 03:34:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.490659550133435) internal successors, (6533), 2623 states have internal predecessors, (6533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6533 transitions. [2021-04-15 03:34:09,310 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6533 transitions. Word has length 32 [2021-04-15 03:34:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:09,310 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 6533 transitions. [2021-04-15 03:34:09,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6533 transitions. [2021-04-15 03:34:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:34:09,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:09,312 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:09,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3783,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:09,517 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1601078774, now seen corresponding path program 242 times [2021-04-15 03:34:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:09,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355597410] [2021-04-15 03:34:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:23,279 WARN L205 SmtUtils]: Spent 13.70 s on a formula simplification. DAG size of input: 63 DAG size of output: 15 [2021-04-15 03:35:15,761 WARN L205 SmtUtils]: Spent 52.45 s on a formula simplification. DAG size of input: 84 DAG size of output: 43 [2021-04-15 03:36:59,480 WARN L205 SmtUtils]: Spent 1.73 m on a formula simplification. DAG size of input: 83 DAG size of output: 28 [2021-04-15 03:37:07,177 WARN L205 SmtUtils]: Spent 7.61 s on a formula simplification. DAG size of input: 69 DAG size of output: 10 [2021-04-15 03:37:07,601 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 3 [2021-04-15 03:37:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355597410] [2021-04-15 03:37:07,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829990127] [2021-04-15 03:37:07,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:07,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:37:07,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:07,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:07,999 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 03:37:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:08,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:08,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505630941] [2021-04-15 03:37:08,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:08,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:08,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:08,219 INFO L87 Difference]: Start difference. First operand 2624 states and 6533 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:09,170 INFO L93 Difference]: Finished difference Result 2870 states and 7132 transitions. [2021-04-15 03:37:09,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:37:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:09,173 INFO L225 Difference]: With dead ends: 2870 [2021-04-15 03:37:09,173 INFO L226 Difference]: Without dead ends: 2840 [2021-04-15 03:37:09,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1385.8ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:37:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-04-15 03:37:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2632. [2021-04-15 03:37:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.490687951349297) internal successors, (6553), 2631 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6553 transitions. [2021-04-15 03:37:09,195 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6553 transitions. Word has length 32 [2021-04-15 03:37:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:09,195 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6553 transitions. [2021-04-15 03:37:09,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6553 transitions. [2021-04-15 03:37:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:09,197 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:09,197 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:09,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3804 [2021-04-15 03:37:09,397 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 243 times [2021-04-15 03:37:09,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:09,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771636198] [2021-04-15 03:37:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:09,619 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-04-15 03:37:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771636198] [2021-04-15 03:37:09,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500493436] [2021-04-15 03:37:09,714 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:09,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:37:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:10,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:10,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:10,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280169640] [2021-04-15 03:37:10,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:10,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:10,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:10,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:10,306 INFO L87 Difference]: Start difference. First operand 2632 states and 6553 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:11,435 INFO L93 Difference]: Finished difference Result 2958 states and 7340 transitions. [2021-04-15 03:37:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:37:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:11,439 INFO L225 Difference]: With dead ends: 2958 [2021-04-15 03:37:11,439 INFO L226 Difference]: Without dead ends: 2912 [2021-04-15 03:37:11,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:37:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-04-15 03:37:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2632. [2021-04-15 03:37:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.490687951349297) internal successors, (6553), 2631 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6553 transitions. [2021-04-15 03:37:11,464 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6553 transitions. Word has length 32 [2021-04-15 03:37:11,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:11,464 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6553 transitions. [2021-04-15 03:37:11,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6553 transitions. [2021-04-15 03:37:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:11,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:11,466 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:11,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3825 [2021-04-15 03:37:11,667 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash 161376374, now seen corresponding path program 244 times [2021-04-15 03:37:11,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:11,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482636061] [2021-04-15 03:37:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:11,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482636061] [2021-04-15 03:37:11,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329473072] [2021-04-15 03:37:11,894 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:11,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:37:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:12,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:12,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:12,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974226950] [2021-04-15 03:37:12,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:12,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:12,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:12,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:12,427 INFO L87 Difference]: Start difference. First operand 2632 states and 6553 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:13,293 INFO L93 Difference]: Finished difference Result 2734 states and 6788 transitions. [2021-04-15 03:37:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:37:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:13,297 INFO L225 Difference]: With dead ends: 2734 [2021-04-15 03:37:13,297 INFO L226 Difference]: Without dead ends: 2704 [2021-04-15 03:37:13,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1220.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 03:37:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-04-15 03:37:13,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2640. [2021-04-15 03:37:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.490716180371353) internal successors, (6573), 2639 states have internal predecessors, (6573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6573 transitions. [2021-04-15 03:37:13,319 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6573 transitions. Word has length 32 [2021-04-15 03:37:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:13,320 INFO L480 AbstractCegarLoop]: Abstraction has 2640 states and 6573 transitions. [2021-04-15 03:37:13,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6573 transitions. [2021-04-15 03:37:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:13,322 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:13,322 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:13,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3844,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:13,522 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 245 times [2021-04-15 03:37:13,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:13,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621186945] [2021-04-15 03:37:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:17,712 WARN L205 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-04-15 03:37:26,118 WARN L205 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2021-04-15 03:37:33,283 WARN L205 SmtUtils]: Spent 7.09 s on a formula simplification. DAG size of input: 77 DAG size of output: 22 [2021-04-15 03:37:37,911 WARN L205 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-04-15 03:37:38,042 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 15 [2021-04-15 03:37:38,405 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 9 [2021-04-15 03:37:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621186945] [2021-04-15 03:37:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702642163] [2021-04-15 03:37:38,441 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:38,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:37:38,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:38,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:38,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:38,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:38,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284224985] [2021-04-15 03:37:38,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:38,968 INFO L87 Difference]: Start difference. First operand 2640 states and 6573 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:39,834 INFO L93 Difference]: Finished difference Result 2854 states and 7088 transitions. [2021-04-15 03:37:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:37:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:39,837 INFO L225 Difference]: With dead ends: 2854 [2021-04-15 03:37:39,837 INFO L226 Difference]: Without dead ends: 2824 [2021-04-15 03:37:39,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1469.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:37:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-04-15 03:37:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2648. [2021-04-15 03:37:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.490744238760861) internal successors, (6593), 2647 states have internal predecessors, (6593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6593 transitions. [2021-04-15 03:37:39,858 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6593 transitions. Word has length 32 [2021-04-15 03:37:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:39,859 INFO L480 AbstractCegarLoop]: Abstraction has 2648 states and 6593 transitions. [2021-04-15 03:37:39,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6593 transitions. [2021-04-15 03:37:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:39,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:39,860 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:40,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3867 [2021-04-15 03:37:40,061 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 246 times [2021-04-15 03:37:40,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:40,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230163469] [2021-04-15 03:37:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230163469] [2021-04-15 03:37:40,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351670068] [2021-04-15 03:37:40,306 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:40,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:37:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:40,793 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-04-15 03:37:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:40,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:40,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:40,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054559462] [2021-04-15 03:37:40,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:40,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:40,971 INFO L87 Difference]: Start difference. First operand 2648 states and 6593 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:41,849 INFO L93 Difference]: Finished difference Result 2862 states and 7104 transitions. [2021-04-15 03:37:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:37:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:41,852 INFO L225 Difference]: With dead ends: 2862 [2021-04-15 03:37:41,853 INFO L226 Difference]: Without dead ends: 2824 [2021-04-15 03:37:41,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1335.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:37:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-04-15 03:37:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2672. [2021-04-15 03:37:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 2.4908274054661175) internal successors, (6653), 2671 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 6653 transitions. [2021-04-15 03:37:41,876 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 6653 transitions. Word has length 32 [2021-04-15 03:37:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:41,876 INFO L480 AbstractCegarLoop]: Abstraction has 2672 states and 6653 transitions. [2021-04-15 03:37:41,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 6653 transitions. [2021-04-15 03:37:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:41,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:41,878 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:42,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:42,082 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 247 times [2021-04-15 03:37:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:42,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177190319] [2021-04-15 03:37:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177190319] [2021-04-15 03:37:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011504246] [2021-04-15 03:37:42,402 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:42,938 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:37:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:43,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:43,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:43,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857714059] [2021-04-15 03:37:43,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:43,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:43,104 INFO L87 Difference]: Start difference. First operand 2672 states and 6653 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:44,202 INFO L93 Difference]: Finished difference Result 3006 states and 7460 transitions. [2021-04-15 03:37:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:37:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:44,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:44,206 INFO L225 Difference]: With dead ends: 3006 [2021-04-15 03:37:44,206 INFO L226 Difference]: Without dead ends: 2960 [2021-04-15 03:37:44,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1678.4ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:37:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-04-15 03:37:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2688. [2021-04-15 03:37:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.4908820245627092) internal successors, (6693), 2687 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 6693 transitions. [2021-04-15 03:37:44,234 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 6693 transitions. Word has length 32 [2021-04-15 03:37:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:44,234 INFO L480 AbstractCegarLoop]: Abstraction has 2688 states and 6693 transitions. [2021-04-15 03:37:44,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 6693 transitions. [2021-04-15 03:37:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:44,236 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:44,236 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:44,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3902,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:44,437 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:44,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 248 times [2021-04-15 03:37:44,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:44,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014830961] [2021-04-15 03:37:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:44,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014830961] [2021-04-15 03:37:44,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118318374] [2021-04-15 03:37:44,878 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:44,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:37:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:45,397 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-04-15 03:37:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:45,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:45,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819403705] [2021-04-15 03:37:45,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:45,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:45,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:45,542 INFO L87 Difference]: Start difference. First operand 2688 states and 6693 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:46,574 INFO L93 Difference]: Finished difference Result 2918 states and 7252 transitions. [2021-04-15 03:37:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:37:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:46,577 INFO L225 Difference]: With dead ends: 2918 [2021-04-15 03:37:46,578 INFO L226 Difference]: Without dead ends: 2896 [2021-04-15 03:37:46,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1465.2ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:37:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-04-15 03:37:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2672. [2021-04-15 03:37:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2671 states have (on average 2.4908274054661175) internal successors, (6653), 2671 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:46,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 6653 transitions. [2021-04-15 03:37:46,600 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 6653 transitions. Word has length 32 [2021-04-15 03:37:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 2672 states and 6653 transitions. [2021-04-15 03:37:46,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 6653 transitions. [2021-04-15 03:37:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:46,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:46,602 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:46,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-04-15 03:37:46,803 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1399331386, now seen corresponding path program 249 times [2021-04-15 03:37:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:46,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700371062] [2021-04-15 03:37:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:47,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700371062] [2021-04-15 03:37:47,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739797265] [2021-04-15 03:37:47,143 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:47,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:37:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:47,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:47,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:47,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869910634] [2021-04-15 03:37:47,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:47,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:47,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:47,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:47,769 INFO L87 Difference]: Start difference. First operand 2672 states and 6653 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:47,962 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-04-15 03:37:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:48,832 INFO L93 Difference]: Finished difference Result 2950 states and 7320 transitions. [2021-04-15 03:37:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:37:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:48,836 INFO L225 Difference]: With dead ends: 2950 [2021-04-15 03:37:48,836 INFO L226 Difference]: Without dead ends: 2904 [2021-04-15 03:37:48,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1546.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:37:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-04-15 03:37:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2696. [2021-04-15 03:37:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.4909090909090907) internal successors, (6713), 2695 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6713 transitions. [2021-04-15 03:37:48,859 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6713 transitions. Word has length 32 [2021-04-15 03:37:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:48,859 INFO L480 AbstractCegarLoop]: Abstraction has 2696 states and 6713 transitions. [2021-04-15 03:37:48,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6713 transitions. [2021-04-15 03:37:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:48,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:48,861 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:49,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3946,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:49,064 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -331438346, now seen corresponding path program 250 times [2021-04-15 03:37:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:49,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043187171] [2021-04-15 03:37:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:49,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043187171] [2021-04-15 03:37:49,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195145067] [2021-04-15 03:37:49,360 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:49,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:37:49,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:49,827 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 03:37:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061238373] [2021-04-15 03:37:49,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:49,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:49,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:49,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:49,969 INFO L87 Difference]: Start difference. First operand 2696 states and 6713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:50,969 INFO L93 Difference]: Finished difference Result 2902 states and 7212 transitions. [2021-04-15 03:37:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:37:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:50,972 INFO L225 Difference]: With dead ends: 2902 [2021-04-15 03:37:50,972 INFO L226 Difference]: Without dead ends: 2880 [2021-04-15 03:37:50,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1488.8ms TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:37:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-04-15 03:37:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2688. [2021-04-15 03:37:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.4908820245627092) internal successors, (6693), 2687 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 6693 transitions. [2021-04-15 03:37:50,996 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 6693 transitions. Word has length 32 [2021-04-15 03:37:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:50,996 INFO L480 AbstractCegarLoop]: Abstraction has 2688 states and 6693 transitions. [2021-04-15 03:37:50,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 6693 transitions. [2021-04-15 03:37:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:50,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:50,998 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:51,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-04-15 03:37:51,205 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash -537376778, now seen corresponding path program 251 times [2021-04-15 03:37:51,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:51,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983592918] [2021-04-15 03:37:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:51,454 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-04-15 03:37:51,749 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-04-15 03:37:52,345 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 18 [2021-04-15 03:37:52,504 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 11 [2021-04-15 03:37:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:52,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983592918] [2021-04-15 03:37:52,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714574048] [2021-04-15 03:37:52,542 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:52,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:37:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:53,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:53,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687230821] [2021-04-15 03:37:53,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:53,070 INFO L87 Difference]: Start difference. First operand 2688 states and 6693 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:54,094 INFO L93 Difference]: Finished difference Result 2982 states and 7404 transitions. [2021-04-15 03:37:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:37:54,095 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:54,098 INFO L225 Difference]: With dead ends: 2982 [2021-04-15 03:37:54,098 INFO L226 Difference]: Without dead ends: 2944 [2021-04-15 03:37:54,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1487.6ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:37:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-04-15 03:37:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2712. [2021-04-15 03:37:54,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.4909627443747695) internal successors, (6753), 2711 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6753 transitions. [2021-04-15 03:37:54,121 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6753 transitions. Word has length 32 [2021-04-15 03:37:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:54,121 INFO L480 AbstractCegarLoop]: Abstraction has 2712 states and 6753 transitions. [2021-04-15 03:37:54,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6753 transitions. [2021-04-15 03:37:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:54,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:54,123 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:54,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:54,324 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:54,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:54,325 INFO L82 PathProgramCache]: Analyzing trace with hash -349686478, now seen corresponding path program 252 times [2021-04-15 03:37:54,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:54,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827176747] [2021-04-15 03:37:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:54,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827176747] [2021-04-15 03:37:54,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519146600] [2021-04-15 03:37:54,805 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:54,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:37:54,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:54,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:55,302 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-04-15 03:37:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535181244] [2021-04-15 03:37:55,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:55,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:55,468 INFO L87 Difference]: Start difference. First operand 2712 states and 6753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:56,598 INFO L93 Difference]: Finished difference Result 2990 states and 7428 transitions. [2021-04-15 03:37:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:37:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:56,602 INFO L225 Difference]: With dead ends: 2990 [2021-04-15 03:37:56,602 INFO L226 Difference]: Without dead ends: 2960 [2021-04-15 03:37:56,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1725.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 03:37:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-04-15 03:37:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2696. [2021-04-15 03:37:56,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2695 states have (on average 2.4909090909090907) internal successors, (6713), 2695 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 6713 transitions. [2021-04-15 03:37:56,626 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 6713 transitions. Word has length 32 [2021-04-15 03:37:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:56,626 INFO L480 AbstractCegarLoop]: Abstraction has 2696 states and 6713 transitions. [2021-04-15 03:37:56,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 6713 transitions. [2021-04-15 03:37:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:56,628 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:56,628 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:56,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-04-15 03:37:56,828 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2141866486, now seen corresponding path program 253 times [2021-04-15 03:37:56,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:56,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299231544] [2021-04-15 03:37:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299231544] [2021-04-15 03:37:57,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195122478] [2021-04-15 03:37:57,080 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:57,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:57,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:57,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892491323] [2021-04-15 03:37:57,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:57,622 INFO L87 Difference]: Start difference. First operand 2696 states and 6713 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:58,481 INFO L93 Difference]: Finished difference Result 2894 states and 7188 transitions. [2021-04-15 03:37:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:37:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:37:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:58,485 INFO L225 Difference]: With dead ends: 2894 [2021-04-15 03:37:58,485 INFO L226 Difference]: Without dead ends: 2864 [2021-04-15 03:37:58,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:37:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-04-15 03:37:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2712. [2021-04-15 03:37:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.4909627443747695) internal successors, (6753), 2711 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:58,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 6753 transitions. [2021-04-15 03:37:58,507 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 6753 transitions. Word has length 32 [2021-04-15 03:37:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:58,507 INFO L480 AbstractCegarLoop]: Abstraction has 2712 states and 6753 transitions. [2021-04-15 03:37:58,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 6753 transitions. [2021-04-15 03:37:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:37:58,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:58,509 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:58,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-04-15 03:37:58,710 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 254 times [2021-04-15 03:37:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:58,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335370539] [2021-04-15 03:37:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:58,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335370539] [2021-04-15 03:37:58,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125270920] [2021-04-15 03:37:58,978 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:58,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:37:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:37:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:37:59,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:59,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:37:59,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995220852] [2021-04-15 03:37:59,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:37:59,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:37:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:37:59,531 INFO L87 Difference]: Start difference. First operand 2712 states and 6753 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:59,941 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-04-15 03:38:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:00,739 INFO L93 Difference]: Finished difference Result 2854 states and 7092 transitions. [2021-04-15 03:38:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:38:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:38:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:00,743 INFO L225 Difference]: With dead ends: 2854 [2021-04-15 03:38:00,743 INFO L226 Difference]: Without dead ends: 2824 [2021-04-15 03:38:00,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1632.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:38:00,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-04-15 03:38:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2704. [2021-04-15 03:38:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2703 states have (on average 2.4909359970403258) internal successors, (6733), 2703 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 6733 transitions. [2021-04-15 03:38:00,765 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 6733 transitions. Word has length 32 [2021-04-15 03:38:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:00,765 INFO L480 AbstractCegarLoop]: Abstraction has 2704 states and 6733 transitions. [2021-04-15 03:38:00,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 6733 transitions. [2021-04-15 03:38:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:38:00,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:00,767 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:00,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:00,968 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:00,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:00,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 255 times [2021-04-15 03:38:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425435853] [2021-04-15 03:38:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:01,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425435853] [2021-04-15 03:38:01,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421564423] [2021-04-15 03:38:01,244 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:01,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:38:01,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:38:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:01,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:01,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:38:01,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322777126] [2021-04-15 03:38:01,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:38:01,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:38:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:38:01,820 INFO L87 Difference]: Start difference. First operand 2704 states and 6733 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:02,742 INFO L93 Difference]: Finished difference Result 2986 states and 7359 transitions. [2021-04-15 03:38:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:38:02,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:38:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:02,746 INFO L225 Difference]: With dead ends: 2986 [2021-04-15 03:38:02,746 INFO L226 Difference]: Without dead ends: 2956 [2021-04-15 03:38:02,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1333.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:38:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-04-15 03:38:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2752. [2021-04-15 03:38:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 2.4925481643038894) internal successors, (6857), 2751 states have internal predecessors, (6857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 6857 transitions. [2021-04-15 03:38:02,770 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 6857 transitions. Word has length 32 [2021-04-15 03:38:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:02,770 INFO L480 AbstractCegarLoop]: Abstraction has 2752 states and 6857 transitions. [2021-04-15 03:38:02,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 6857 transitions. [2021-04-15 03:38:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:38:02,772 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:02,772 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:02,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4051,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:02,973 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 256 times [2021-04-15 03:38:02,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:02,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637041983] [2021-04-15 03:38:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637041983] [2021-04-15 03:38:03,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435648627] [2021-04-15 03:38:03,265 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:03,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:38:03,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:03,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:38:03,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:03,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:03,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:38:03,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926808245] [2021-04-15 03:38:03,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:38:03,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:03,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:38:03,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:38:03,801 INFO L87 Difference]: Start difference. First operand 2752 states and 6857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:04,490 INFO L93 Difference]: Finished difference Result 2838 states and 7048 transitions. [2021-04-15 03:38:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:38:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:38:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:04,494 INFO L225 Difference]: With dead ends: 2838 [2021-04-15 03:38:04,494 INFO L226 Difference]: Without dead ends: 2808 [2021-04-15 03:38:04,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1169.6ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:38:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-04-15 03:38:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2744. [2021-04-15 03:38:04,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2744 states, 2743 states have (on average 2.4910681735326285) internal successors, (6833), 2743 states have internal predecessors, (6833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2744 states to 2744 states and 6833 transitions. [2021-04-15 03:38:04,517 INFO L78 Accepts]: Start accepts. Automaton has 2744 states and 6833 transitions. Word has length 32 [2021-04-15 03:38:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:04,517 INFO L480 AbstractCegarLoop]: Abstraction has 2744 states and 6833 transitions. [2021-04-15 03:38:04,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:04,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2744 states and 6833 transitions. [2021-04-15 03:38:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:38:04,519 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:04,519 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:04,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-04-15 03:38:04,720 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 257 times [2021-04-15 03:38:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:04,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219053982] [2021-04-15 03:38:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219053982] [2021-04-15 03:38:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901472349] [2021-04-15 03:38:05,274 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:05,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:38:05,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:38:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:05,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:05,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:38:05,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429900669] [2021-04-15 03:38:05,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:38:05,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:05,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:38:05,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:38:05,843 INFO L87 Difference]: Start difference. First operand 2744 states and 6833 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:07,058 INFO L93 Difference]: Finished difference Result 2950 states and 7324 transitions. [2021-04-15 03:38:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:38:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:38:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:07,062 INFO L225 Difference]: With dead ends: 2950 [2021-04-15 03:38:07,062 INFO L226 Difference]: Without dead ends: 2912 [2021-04-15 03:38:07,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1607.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:38:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2021-04-15 03:38:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2776. [2021-04-15 03:38:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.491171171171171) internal successors, (6913), 2775 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6913 transitions. [2021-04-15 03:38:07,087 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6913 transitions. Word has length 32 [2021-04-15 03:38:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:07,087 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 6913 transitions. [2021-04-15 03:38:07,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6913 transitions. [2021-04-15 03:38:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:38:07,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:07,089 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:07,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-04-15 03:38:07,290 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 258 times [2021-04-15 03:38:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:07,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674879479] [2021-04-15 03:38:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674879479] [2021-04-15 03:38:07,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736923018] [2021-04-15 03:38:07,549 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:07,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:38:07,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:38:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:08,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:08,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 03:38:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529107429] [2021-04-15 03:38:08,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:38:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:38:08,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:38:08,071 INFO L87 Difference]: Start difference. First operand 2776 states and 6913 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:08,906 INFO L93 Difference]: Finished difference Result 2910 states and 7228 transitions. [2021-04-15 03:38:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:38:08,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:38:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:08,910 INFO L225 Difference]: With dead ends: 2910 [2021-04-15 03:38:08,910 INFO L226 Difference]: Without dead ends: 2880 [2021-04-15 03:38:08,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1171.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:38:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-04-15 03:38:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2776. [2021-04-15 03:38:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.491171171171171) internal successors, (6913), 2775 states have internal predecessors, (6913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6913 transitions. [2021-04-15 03:38:08,933 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6913 transitions. Word has length 32 [2021-04-15 03:38:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:08,933 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 6913 transitions. [2021-04-15 03:38:08,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6913 transitions. [2021-04-15 03:38:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:38:08,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:08,935 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:09,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:09,136 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1175635588, now seen corresponding path program 259 times [2021-04-15 03:38:09,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:09,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554515164] [2021-04-15 03:38:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:09,320 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 16 [2021-04-15 03:38:10,372 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 15 [2021-04-15 03:38:11,747 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 112 DAG size of output: 14 [2021-04-15 03:38:13,103 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 110 DAG size of output: 12 [2021-04-15 03:38:15,731 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 116 DAG size of output: 16 [2021-04-15 03:38:16,764 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 13 [2021-04-15 03:38:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554515164] [2021-04-15 03:38:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668504108] [2021-04-15 03:38:16,816 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:38:16,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:17,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:17,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:38:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403645614] [2021-04-15 03:38:17,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:38:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:38:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:38:17,483 INFO L87 Difference]: Start difference. First operand 2776 states and 6913 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:18,650 INFO L93 Difference]: Finished difference Result 3212 states and 7928 transitions. [2021-04-15 03:38:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:38:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:38:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:18,654 INFO L225 Difference]: With dead ends: 3212 [2021-04-15 03:38:18,654 INFO L226 Difference]: Without dead ends: 3162 [2021-04-15 03:38:18,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1739.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:38:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-04-15 03:38:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2834. [2021-04-15 03:38:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 2.4909989410518882) internal successors, (7057), 2833 states have internal predecessors, (7057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 7057 transitions. [2021-04-15 03:38:18,678 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 7057 transitions. Word has length 34 [2021-04-15 03:38:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:18,679 INFO L480 AbstractCegarLoop]: Abstraction has 2834 states and 7057 transitions. [2021-04-15 03:38:18,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 7057 transitions. [2021-04-15 03:38:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:38:18,681 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:18,681 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:18,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4118 [2021-04-15 03:38:18,881 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash 985701192, now seen corresponding path program 260 times [2021-04-15 03:38:18,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:18,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171863765] [2021-04-15 03:38:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:19,071 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 15 [2021-04-15 03:38:19,519 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 13 [2021-04-15 03:38:19,965 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 12 [2021-04-15 03:38:25,017 WARN L205 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 76 DAG size of output: 7 [2021-04-15 03:38:30,240 WARN L205 SmtUtils]: Spent 5.21 s on a formula simplification. DAG size of input: 75 DAG size of output: 11 [2021-04-15 03:38:41,242 WARN L205 SmtUtils]: Spent 10.98 s on a formula simplification. DAG size of input: 79 DAG size of output: 10 [2021-04-15 03:38:48,814 WARN L205 SmtUtils]: Spent 7.55 s on a formula simplification. DAG size of input: 89 DAG size of output: 14 [2021-04-15 03:38:52,407 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 88 DAG size of output: 14 [2021-04-15 03:38:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:52,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171863765] [2021-04-15 03:38:52,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035257342] [2021-04-15 03:38:52,459 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:52,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:38:52,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:38:52,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:53,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:53,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:38:53,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90695380] [2021-04-15 03:38:53,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:38:53,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:38:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:38:53,027 INFO L87 Difference]: Start difference. First operand 2834 states and 7057 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:53,940 INFO L93 Difference]: Finished difference Result 3254 states and 8047 transitions. [2021-04-15 03:38:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:38:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:38:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:53,945 INFO L225 Difference]: With dead ends: 3254 [2021-04-15 03:38:53,945 INFO L226 Difference]: Without dead ends: 3224 [2021-04-15 03:38:53,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1237.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:38:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-04-15 03:38:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2866. [2021-04-15 03:38:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 2.4910994764397905) internal successors, (7137), 2865 states have internal predecessors, (7137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 7137 transitions. [2021-04-15 03:38:53,971 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 7137 transitions. Word has length 34 [2021-04-15 03:38:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:53,971 INFO L480 AbstractCegarLoop]: Abstraction has 2866 states and 7137 transitions. [2021-04-15 03:38:53,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 7137 transitions. [2021-04-15 03:38:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:38:53,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:53,973 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:54,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4138,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:54,174 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:54,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:54,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2050127740, now seen corresponding path program 261 times [2021-04-15 03:38:54,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:54,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413544675] [2021-04-15 03:38:54,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:54,357 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 16 [2021-04-15 03:38:54,564 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2021-04-15 03:38:54,937 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 20 [2021-04-15 03:38:55,135 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 15 [2021-04-15 03:38:55,315 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 14 [2021-04-15 03:38:55,481 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 10 [2021-04-15 03:38:56,178 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 10 [2021-04-15 03:38:56,454 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 3 [2021-04-15 03:38:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:56,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413544675] [2021-04-15 03:38:56,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751380691] [2021-04-15 03:38:56,490 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:38:56,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:38:56,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:38:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:38:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:38:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:38:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:38:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:38:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173282840] [2021-04-15 03:38:57,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:38:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:38:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:38:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:38:57,176 INFO L87 Difference]: Start difference. First operand 2866 states and 7137 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:38:58,666 INFO L93 Difference]: Finished difference Result 3304 states and 8212 transitions. [2021-04-15 03:38:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:38:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:38:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:38:58,671 INFO L225 Difference]: With dead ends: 3304 [2021-04-15 03:38:58,671 INFO L226 Difference]: Without dead ends: 3258 [2021-04-15 03:38:58,671 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1927.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 03:38:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-04-15 03:38:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 2882. [2021-04-15 03:38:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 2.4911489066296424) internal successors, (7177), 2881 states have internal predecessors, (7177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 7177 transitions. [2021-04-15 03:38:58,698 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 7177 transitions. Word has length 34 [2021-04-15 03:38:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:38:58,698 INFO L480 AbstractCegarLoop]: Abstraction has 2882 states and 7177 transitions. [2021-04-15 03:38:58,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:38:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 7177 transitions. [2021-04-15 03:38:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:38:58,700 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:38:58,700 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:38:58,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4153 [2021-04-15 03:38:58,901 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:38:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:38:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1862437440, now seen corresponding path program 262 times [2021-04-15 03:38:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:38:58,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124920668] [2021-04-15 03:38:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:38:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:38:59,152 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 15 [2021-04-15 03:39:11,075 WARN L205 SmtUtils]: Spent 11.73 s on a formula simplification. DAG size of input: 101 DAG size of output: 24 [2021-04-15 03:39:22,718 WARN L205 SmtUtils]: Spent 11.60 s on a formula simplification. DAG size of input: 101 DAG size of output: 17 [2021-04-15 03:39:34,009 WARN L205 SmtUtils]: Spent 11.26 s on a formula simplification. DAG size of input: 104 DAG size of output: 25 [2021-04-15 03:39:41,614 WARN L205 SmtUtils]: Spent 7.54 s on a formula simplification. DAG size of input: 107 DAG size of output: 21 [2021-04-15 03:39:43,544 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 81 DAG size of output: 10 [2021-04-15 03:39:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:39:43,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124920668] [2021-04-15 03:39:43,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798907930] [2021-04-15 03:39:43,587 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:39:43,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:39:43,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:39:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:39:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:39:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:39:44,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:39:44,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:39:44,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026331963] [2021-04-15 03:39:44,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:39:44,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:39:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:39:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:39:44,270 INFO L87 Difference]: Start difference. First operand 2882 states and 7177 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:39:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:39:45,726 INFO L93 Difference]: Finished difference Result 3376 states and 8352 transitions. [2021-04-15 03:39:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:39:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:39:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:39:45,730 INFO L225 Difference]: With dead ends: 3376 [2021-04-15 03:39:45,730 INFO L226 Difference]: Without dead ends: 3346 [2021-04-15 03:39:45,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2077.7ms TimeCoverageRelationStatistics Valid=529, Invalid=1823, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 03:39:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-04-15 03:39:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2914. [2021-04-15 03:39:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2914 states, 2913 states have (on average 2.49124613800206) internal successors, (7257), 2913 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:39:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2914 states to 2914 states and 7257 transitions. [2021-04-15 03:39:45,756 INFO L78 Accepts]: Start accepts. Automaton has 2914 states and 7257 transitions. Word has length 34 [2021-04-15 03:39:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:39:45,756 INFO L480 AbstractCegarLoop]: Abstraction has 2914 states and 7257 transitions. [2021-04-15 03:39:45,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:39:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2914 states and 7257 transitions. [2021-04-15 03:39:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:39:45,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:39:45,758 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:39:45,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4175 [2021-04-15 03:39:45,958 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:39:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:39:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash -470005244, now seen corresponding path program 263 times [2021-04-15 03:39:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:39:45,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684587439] [2021-04-15 03:39:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:39:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:39:46,143 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 15 [2021-04-15 03:39:59,336 WARN L205 SmtUtils]: Spent 12.97 s on a formula simplification. DAG size of input: 89 DAG size of output: 7 [2021-04-15 03:40:12,441 WARN L205 SmtUtils]: Spent 13.09 s on a formula simplification. DAG size of input: 88 DAG size of output: 17 [2021-04-15 03:40:18,210 WARN L205 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 103 DAG size of output: 10 [2021-04-15 03:40:28,942 WARN L205 SmtUtils]: Spent 10.72 s on a formula simplification. DAG size of input: 110 DAG size of output: 9 [2021-04-15 03:40:31,160 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 78 DAG size of output: 10 [2021-04-15 03:40:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:31,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684587439] [2021-04-15 03:40:31,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428871350] [2021-04-15 03:40:31,203 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:40:31,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:40:31,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:40:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:40:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:40:31,820 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-04-15 03:40:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:31,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:40:31,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:40:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637719559] [2021-04-15 03:40:31,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:40:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:40:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:40:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:40:31,991 INFO L87 Difference]: Start difference. First operand 2914 states and 7257 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:32,296 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2021-04-15 03:40:32,737 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-04-15 03:40:33,032 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-04-15 03:40:33,256 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-04-15 03:40:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:40:33,625 INFO L93 Difference]: Finished difference Result 3278 states and 8107 transitions. [2021-04-15 03:40:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:40:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:40:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:40:33,629 INFO L225 Difference]: With dead ends: 3278 [2021-04-15 03:40:33,629 INFO L226 Difference]: Without dead ends: 3248 [2021-04-15 03:40:33,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2170.8ms TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 03:40:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-04-15 03:40:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 2938. [2021-04-15 03:40:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.491317671092952) internal successors, (7317), 2937 states have internal predecessors, (7317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 7317 transitions. [2021-04-15 03:40:33,655 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 7317 transitions. Word has length 34 [2021-04-15 03:40:33,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:40:33,655 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 7317 transitions. [2021-04-15 03:40:33,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 7317 transitions. [2021-04-15 03:40:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:40:33,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:40:33,657 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:40:33,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4197,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:40:33,858 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:40:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:40:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2094192320, now seen corresponding path program 264 times [2021-04-15 03:40:33,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:40:33,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690304625] [2021-04-15 03:40:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:40:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:40:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690304625] [2021-04-15 03:40:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085426020] [2021-04-15 03:40:34,253 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:40:34,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:40:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:40:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:40:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:40:34,993 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-04-15 03:40:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:35,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:40:35,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:40:35,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478773522] [2021-04-15 03:40:35,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:40:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:40:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:40:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:40:35,188 INFO L87 Difference]: Start difference. First operand 2938 states and 7317 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:35,559 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-04-15 03:40:35,899 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-04-15 03:40:36,197 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 03:40:36,438 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-04-15 03:40:36,634 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-04-15 03:40:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:40:36,881 INFO L93 Difference]: Finished difference Result 3256 states and 8096 transitions. [2021-04-15 03:40:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:40:36,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:40:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:40:36,885 INFO L225 Difference]: With dead ends: 3256 [2021-04-15 03:40:36,885 INFO L226 Difference]: Without dead ends: 3226 [2021-04-15 03:40:36,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2283.9ms TimeCoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:40:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-04-15 03:40:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2954. [2021-04-15 03:40:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 2.491364713850322) internal successors, (7357), 2953 states have internal predecessors, (7357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 7357 transitions. [2021-04-15 03:40:36,913 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 7357 transitions. Word has length 34 [2021-04-15 03:40:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:40:36,913 INFO L480 AbstractCegarLoop]: Abstraction has 2954 states and 7357 transitions. [2021-04-15 03:40:36,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 7357 transitions. [2021-04-15 03:40:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:40:36,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:40:36,915 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:40:37,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4223,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:40:37,115 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:40:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:40:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -516270400, now seen corresponding path program 265 times [2021-04-15 03:40:37,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:40:37,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786157550] [2021-04-15 03:40:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:40:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:40:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:37,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786157550] [2021-04-15 03:40:37,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657856601] [2021-04-15 03:40:37,767 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:40:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:40:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:40:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:40:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:40:38,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:40:38,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-04-15 03:40:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146938032] [2021-04-15 03:40:38,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 03:40:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:40:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 03:40:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:40:38,463 INFO L87 Difference]: Start difference. First operand 2954 states and 7357 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:40:39,723 INFO L93 Difference]: Finished difference Result 3388 states and 8372 transitions. [2021-04-15 03:40:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:40:39,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:40:39,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:40:39,727 INFO L225 Difference]: With dead ends: 3388 [2021-04-15 03:40:39,727 INFO L226 Difference]: Without dead ends: 3346 [2021-04-15 03:40:39,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1999.5ms TimeCoverageRelationStatistics Valid=426, Invalid=1644, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:40:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-04-15 03:40:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 2986. [2021-04-15 03:40:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 2.4914572864321607) internal successors, (7437), 2985 states have internal predecessors, (7437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 7437 transitions. [2021-04-15 03:40:39,754 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 7437 transitions. Word has length 34 [2021-04-15 03:40:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:40:39,754 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 7437 transitions. [2021-04-15 03:40:39,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:40:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 7437 transitions. [2021-04-15 03:40:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:40:39,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:40:39,756 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:40:39,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-04-15 03:40:39,957 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:40:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:40:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 876161796, now seen corresponding path program 266 times [2021-04-15 03:40:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:40:39,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056868836] [2021-04-15 03:40:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:40:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:40:52,020 WARN L205 SmtUtils]: Spent 11.91 s on a formula simplification. DAG size of input: 67 DAG size of output: 30 [2021-04-15 03:41:17,074 WARN L205 SmtUtils]: Spent 24.96 s on a formula simplification. DAG size of input: 78 DAG size of output: 56 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown