java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:30,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:30,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:30,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:30,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:30,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:30,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:30,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:30,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:30,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:30,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:30,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:30,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:30,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:30,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:30,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:30,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:30,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:30,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:30,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:30,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:30,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:30,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:30,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:30,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:59:30,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:30,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:30,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:30,760 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:59:30,784 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:30,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:30,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:30,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:30,789 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:30,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:30,789 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:30,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:30,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:30,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:30,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:30,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:30,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:30,792 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:30,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:30,793 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:30,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:30,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:30,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:30,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:30,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:30,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:30,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:30,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:30,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:30,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:30,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:30,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:30,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:31,104 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:31,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:31,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:31,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:31,123 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:31,124 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-13 17:59:31,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9997a5374/e614c9793092435e926d7855e62bb30b/FLAG54055ad04 [2019-10-13 17:59:31,908 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:31,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label10.c [2019-10-13 17:59:31,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9997a5374/e614c9793092435e926d7855e62bb30b/FLAG54055ad04 [2019-10-13 17:59:32,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9997a5374/e614c9793092435e926d7855e62bb30b [2019-10-13 17:59:32,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:32,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:32,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:32,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:32,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:32,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:32" (1/1) ... [2019-10-13 17:59:32,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128bbf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:32, skipping insertion in model container [2019-10-13 17:59:32,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:32" (1/1) ... [2019-10-13 17:59:32,124 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:32,183 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:32,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:32,964 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:33,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:33,282 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:33,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33 WrapperNode [2019-10-13 17:59:33,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:33,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:33,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:33,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:33,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:33,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:33,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:33,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:33,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (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 [2019-10-13 17:59:33,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:35,359 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:35,361 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:35,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:35 BoogieIcfgContainer [2019-10-13 17:59:35,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:35,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:35,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:35,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:35,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:32" (1/3) ... [2019-10-13 17:59:35,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109af779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:35, skipping insertion in model container [2019-10-13 17:59:35,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33" (2/3) ... [2019-10-13 17:59:35,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109af779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:35, skipping insertion in model container [2019-10-13 17:59:35,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:35" (3/3) ... [2019-10-13 17:59:35,384 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label10.c [2019-10-13 17:59:35,397 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:35,410 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:35,427 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:35,479 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:35,480 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:35,480 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:35,480 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:35,481 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:35,481 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:35,481 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:35,481 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 17:59:35,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:59:35,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:35,546 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:35,548 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:35,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:35,555 INFO L82 PathProgramCache]: Analyzing trace with hash 734030971, now seen corresponding path program 1 times [2019-10-13 17:59:35,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:35,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611910685] [2019-10-13 17:59:35,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:35,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:35,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:36,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611910685] [2019-10-13 17:59:36,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:36,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:36,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614870904] [2019-10-13 17:59:36,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:36,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:36,138 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 17:59:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:39,898 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-13 17:59:39,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:39,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-13 17:59:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:39,946 INFO L225 Difference]: With dead ends: 1009 [2019-10-13 17:59:39,946 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 17:59:39,955 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 17:59:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-13 17:59:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 17:59:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-13 17:59:40,058 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 28 [2019-10-13 17:59:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:40,059 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-13 17:59:40,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-13 17:59:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 17:59:40,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:40,065 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:40,065 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1011694458, now seen corresponding path program 1 times [2019-10-13 17:59:40,066 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:40,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845256419] [2019-10-13 17:59:40,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:40,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:40,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:40,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845256419] [2019-10-13 17:59:40,417 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:40,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:40,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519026394] [2019-10-13 17:59:40,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:40,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:40,423 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-13 17:59:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:43,599 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-13 17:59:43,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:59:43,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 100 [2019-10-13 17:59:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:43,613 INFO L225 Difference]: With dead ends: 2436 [2019-10-13 17:59:43,614 INFO L226 Difference]: Without dead ends: 1816 [2019-10-13 17:59:43,617 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:59:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-13 17:59:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-13 17:59:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-13 17:59:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-13 17:59:43,711 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 100 [2019-10-13 17:59:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:43,712 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-13 17:59:43,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-13 17:59:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 17:59:43,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:43,717 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:43,717 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash -356402163, now seen corresponding path program 1 times [2019-10-13 17:59:43,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:43,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497760813] [2019-10-13 17:59:43,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:43,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:43,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:43,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497760813] [2019-10-13 17:59:43,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232822748] [2019-10-13 17:59:43,969 INFO L94 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 [2019-10-13 17:59:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:44,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:44,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:44,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:44,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:44,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380529295] [2019-10-13 17:59:44,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:44,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:44,155 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-13 17:59:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:45,170 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-13 17:59:45,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:45,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-10-13 17:59:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:45,192 INFO L225 Difference]: With dead ends: 4128 [2019-10-13 17:59:45,192 INFO L226 Difference]: Without dead ends: 2357 [2019-10-13 17:59:45,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-13 17:59:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-13 17:59:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 17:59:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-13 17:59:45,282 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 101 [2019-10-13 17:59:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:45,283 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-13 17:59:45,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:45,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-13 17:59:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:59:45,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:45,287 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:45,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:45,491 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash 306354774, now seen corresponding path program 1 times [2019-10-13 17:59:45,492 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:45,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643810954] [2019-10-13 17:59:45,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:45,492 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:45,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:45,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643810954] [2019-10-13 17:59:45,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825740580] [2019-10-13 17:59:45,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:45,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:45,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:45,852 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:45,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:45,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333120811] [2019-10-13 17:59:45,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:45,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:45,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:45,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:45,857 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-13 17:59:46,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:46,864 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-13 17:59:46,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:46,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2019-10-13 17:59:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:46,889 INFO L225 Difference]: With dead ends: 4704 [2019-10-13 17:59:46,890 INFO L226 Difference]: Without dead ends: 2361 [2019-10-13 17:59:46,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-13 17:59:46,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-13 17:59:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 17:59:46,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-13 17:59:46,961 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 102 [2019-10-13 17:59:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:46,962 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-13 17:59:46,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-13 17:59:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:59:46,965 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:46,965 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:47,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:47,169 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1268458330, now seen corresponding path program 1 times [2019-10-13 17:59:47,171 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:47,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278384295] [2019-10-13 17:59:47,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:47,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:47,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:47,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278384295] [2019-10-13 17:59:47,480 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:47,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:59:47,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986432133] [2019-10-13 17:59:47,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:59:47,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:59:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:47,485 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-13 17:59:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:49,716 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-13 17:59:49,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:59:49,716 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2019-10-13 17:59:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:49,747 INFO L225 Difference]: With dead ends: 6927 [2019-10-13 17:59:49,747 INFO L226 Difference]: Without dead ends: 4584 [2019-10-13 17:59:49,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:59:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-13 17:59:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-10-13 17:59:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-10-13 17:59:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-10-13 17:59:49,887 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 126 [2019-10-13 17:59:49,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:49,888 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-10-13 17:59:49,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:59:49,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-10-13 17:59:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 17:59:49,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:49,894 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:49,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1769948106, now seen corresponding path program 1 times [2019-10-13 17:59:49,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:49,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267116464] [2019-10-13 17:59:49,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:49,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:49,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:50,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267116464] [2019-10-13 17:59:50,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437539109] [2019-10-13 17:59:50,191 INFO L94 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 [2019-10-13 17:59:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:50,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:59:50,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:50,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:50,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-13 17:59:50,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896758166] [2019-10-13 17:59:50,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:59:50,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:50,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:59:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:59:50,334 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-10-13 17:59:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:52,532 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-10-13 17:59:52,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:59:52,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2019-10-13 17:59:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:52,567 INFO L225 Difference]: With dead ends: 10686 [2019-10-13 17:59:52,567 INFO L226 Difference]: Without dead ends: 6353 [2019-10-13 17:59:52,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-10-13 17:59:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-10-13 17:59:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-10-13 17:59:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-10-13 17:59:52,785 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 173 [2019-10-13 17:59:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:52,787 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-10-13 17:59:52,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:59:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-10-13 17:59:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-13 17:59:52,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:52,793 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:52,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:52,998 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 651997042, now seen corresponding path program 1 times [2019-10-13 17:59:52,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:53,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759139068] [2019-10-13 17:59:53,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:53,000 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:53,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:53,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759139068] [2019-10-13 17:59:53,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018124863] [2019-10-13 17:59:53,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:53,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:59:53,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:53,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:53,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:59:53,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273597894] [2019-10-13 17:59:53,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:53,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:53,446 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-10-13 17:59:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:54,875 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-10-13 17:59:54,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:54,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2019-10-13 17:59:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:54,904 INFO L225 Difference]: With dead ends: 13284 [2019-10-13 17:59:54,905 INFO L226 Difference]: Without dead ends: 7218 [2019-10-13 17:59:54,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-10-13 17:59:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-10-13 17:59:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-10-13 17:59:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-10-13 17:59:55,066 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 191 [2019-10-13 17:59:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:55,067 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-10-13 17:59:55,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-10-13 17:59:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-10-13 17:59:55,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:55,071 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:55,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:55,284 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2031643392, now seen corresponding path program 1 times [2019-10-13 17:59:55,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:55,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844062220] [2019-10-13 17:59:55,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:55,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:55,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 41 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:59:55,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844062220] [2019-10-13 17:59:55,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114428508] [2019-10-13 17:59:55,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:55,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:59:55,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:55,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:59:55,929 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:55,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-10-13 17:59:55,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380077642] [2019-10-13 17:59:55,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:55,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:55,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:55,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:59:55,931 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-10-13 17:59:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:57,703 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-10-13 17:59:57,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:59:57,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 195 [2019-10-13 17:59:57,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:57,725 INFO L225 Difference]: With dead ends: 12989 [2019-10-13 17:59:57,725 INFO L226 Difference]: Without dead ends: 6533 [2019-10-13 17:59:57,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-10-13 17:59:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-10-13 17:59:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-10-13 17:59:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-10-13 17:59:57,884 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 195 [2019-10-13 17:59:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:57,884 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-10-13 17:59:57,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-10-13 17:59:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 17:59:57,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:57,890 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:58,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:58,095 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065224, now seen corresponding path program 1 times [2019-10-13 17:59:58,096 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:58,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964270443] [2019-10-13 17:59:58,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:58,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:58,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:58,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964270443] [2019-10-13 17:59:58,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470021041] [2019-10-13 17:59:58,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:59:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:58,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:58,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:58,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:58,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:59:58,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109913493] [2019-10-13 17:59:58,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:59:58,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:58,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:59:58,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:59:58,769 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-10-13 18:00:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:02,503 INFO L93 Difference]: Finished difference Result 14922 states and 20088 transitions. [2019-10-13 18:00:02,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 18:00:02,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-10-13 18:00:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:02,537 INFO L225 Difference]: With dead ends: 14922 [2019-10-13 18:00:02,537 INFO L226 Difference]: Without dead ends: 8428 [2019-10-13 18:00:02,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-13 18:00:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8428 states. [2019-10-13 18:00:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8428 to 8268. [2019-10-13 18:00:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8268 states. [2019-10-13 18:00:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8268 states to 8268 states and 10473 transitions. [2019-10-13 18:00:02,736 INFO L78 Accepts]: Start accepts. Automaton has 8268 states and 10473 transitions. Word has length 230 [2019-10-13 18:00:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:02,737 INFO L462 AbstractCegarLoop]: Abstraction has 8268 states and 10473 transitions. [2019-10-13 18:00:02,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:00:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8268 states and 10473 transitions. [2019-10-13 18:00:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-13 18:00:02,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:02,743 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:02,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:02,953 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2138370387, now seen corresponding path program 1 times [2019-10-13 18:00:02,954 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:02,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624518714] [2019-10-13 18:00:02,954 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:02,955 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:02,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 114 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:03,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624518714] [2019-10-13 18:00:03,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760610171] [2019-10-13 18:00:03,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:03,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 18:00:03,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:03,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:03,782 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2019-10-13 18:00:03,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:04,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:04,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-13 18:00:04,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046518802] [2019-10-13 18:00:04,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 18:00:04,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:04,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 18:00:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:00:04,055 INFO L87 Difference]: Start difference. First operand 8268 states and 10473 transitions. Second operand 15 states. [2019-10-13 18:00:06,802 WARN L191 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28