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/Problem14_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:16,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:16,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:16,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:16,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:16,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:16,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:16,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:16,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:16,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:16,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:16,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:16,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:16,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:16,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:16,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:16,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:16,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:16,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:16,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:16,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:16,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:16,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:16,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:16,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:16,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:16,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:16,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:16,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:16,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:16,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:16,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:16,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:16,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:16,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:16,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:16,806 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 18:03:16,820 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:16,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:16,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:16,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:16,822 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:16,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:16,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:16,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:16,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:16,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:16,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:16,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:16,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:16,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:16,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:16,824 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:16,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:16,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:16,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:16,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:16,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:16,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:16,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:16,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:16,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:16,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:16,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:16,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:16,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:17,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:17,110 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:17,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:17,115 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:17,116 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:17,116 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-13 18:03:17,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f59e61cc/aec20f373c8b492fafd98f2862213138/FLAG87ee5840f [2019-10-13 18:03:17,720 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:17,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label44.c [2019-10-13 18:03:17,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f59e61cc/aec20f373c8b492fafd98f2862213138/FLAG87ee5840f [2019-10-13 18:03:18,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f59e61cc/aec20f373c8b492fafd98f2862213138 [2019-10-13 18:03:18,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:18,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:18,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:18,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:18,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:18,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18, skipping insertion in model container [2019-10-13 18:03:18,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,050 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:18,109 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:18,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:18,723 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:18,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:18,852 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:18,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18 WrapperNode [2019-10-13 18:03:18,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:18,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:18,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:18,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:18,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (1/1) ... [2019-10-13 18:03:18,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:18,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:18,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:18,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:18,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (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 18:03:19,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:19,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:19,042 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:19,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:19,042 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:19,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:19,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:19,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:19,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:19,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:20,388 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:20,389 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:20,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:20 BoogieIcfgContainer [2019-10-13 18:03:20,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:20,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:20,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:20,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:20,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:18" (1/3) ... [2019-10-13 18:03:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:20, skipping insertion in model container [2019-10-13 18:03:20,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:18" (2/3) ... [2019-10-13 18:03:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45323431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:20, skipping insertion in model container [2019-10-13 18:03:20,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:20" (3/3) ... [2019-10-13 18:03:20,399 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2019-10-13 18:03:20,408 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:20,416 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:20,427 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:20,453 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:20,454 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:20,454 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:20,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:20,454 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:20,455 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:20,455 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:20,455 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 18:03:20,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:20,488 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:20,489 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash -989093190, now seen corresponding path program 1 times [2019-10-13 18:03:20,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:20,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-13 18:03:20,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:20,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:20,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,796 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 18:03:20,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648795367] [2019-10-13 18:03:20,800 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:20,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:20,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093372571] [2019-10-13 18:03:20,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:20,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:20,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:20,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:20,831 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:23,503 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-10-13 18:03:23,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:23,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-13 18:03:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:23,524 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:03:23,524 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:23,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-10-13 18:03:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-13 18:03:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-13 18:03:23,641 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 17 [2019-10-13 18:03:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:23,641 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-13 18:03:23,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-13 18:03:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 18:03:23,654 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:23,656 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:03:23,656 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:23,658 INFO L82 PathProgramCache]: Analyzing trace with hash 649942285, now seen corresponding path program 1 times [2019-10-13 18:03:23,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:23,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490573447] [2019-10-13 18:03:23,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:23,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:23,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:23,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490573447] [2019-10-13 18:03:23,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915740085] [2019-10-13 18:03:23,896 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 18:03:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:23,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:24,054 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:24,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:24,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20381152] [2019-10-13 18:03:24,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:24,056 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:24,057 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-13 18:03:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:24,910 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-10-13 18:03:24,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:24,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-13 18:03:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:24,916 INFO L225 Difference]: With dead ends: 1114 [2019-10-13 18:03:24,916 INFO L226 Difference]: Without dead ends: 744 [2019-10-13 18:03:24,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-13 18:03:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-13 18:03:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-13 18:03:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-10-13 18:03:24,957 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 100 [2019-10-13 18:03:24,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:24,960 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-10-13 18:03:24,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-10-13 18:03:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 18:03:24,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:24,963 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:25,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:25,167 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2036174565, now seen corresponding path program 1 times [2019-10-13 18:03:25,168 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:25,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645396783] [2019-10-13 18:03:25,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:25,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645396783] [2019-10-13 18:03:25,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:25,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 18:03:25,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688192695] [2019-10-13 18:03:25,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 18:03:25,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 18:03:25,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:25,667 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 10 states. [2019-10-13 18:03:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:28,217 INFO L93 Difference]: Finished difference Result 2058 states and 2654 transitions. [2019-10-13 18:03:28,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 18:03:28,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 112 [2019-10-13 18:03:28,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:28,225 INFO L225 Difference]: With dead ends: 2058 [2019-10-13 18:03:28,225 INFO L226 Difference]: Without dead ends: 1320 [2019-10-13 18:03:28,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2019-10-13 18:03:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1122. [2019-10-13 18:03:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1122 states. [2019-10-13 18:03:28,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1418 transitions. [2019-10-13 18:03:28,270 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1418 transitions. Word has length 112 [2019-10-13 18:03:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:28,270 INFO L462 AbstractCegarLoop]: Abstraction has 1122 states and 1418 transitions. [2019-10-13 18:03:28,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 18:03:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1418 transitions. [2019-10-13 18:03:28,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 18:03:28,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:28,274 INFO L380 BasicCegarLoop]: trace histogram [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, 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 18:03:28,274 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1995624033, now seen corresponding path program 1 times [2019-10-13 18:03:28,275 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:28,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272258887] [2019-10-13 18:03:28,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:03:28,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272258887] [2019-10-13 18:03:28,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757620388] [2019-10-13 18:03:28,471 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 18:03:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:28,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:28,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:28,612 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:28,612 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416843727] [2019-10-13 18:03:28,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:28,613 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:28,614 INFO L87 Difference]: Start difference. First operand 1122 states and 1418 transitions. Second operand 3 states. [2019-10-13 18:03:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:29,375 INFO L93 Difference]: Finished difference Result 1676 states and 2187 transitions. [2019-10-13 18:03:29,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:29,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-13 18:03:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:29,386 INFO L225 Difference]: With dead ends: 1676 [2019-10-13 18:03:29,387 INFO L226 Difference]: Without dead ends: 1674 [2019-10-13 18:03:29,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2019-10-13 18:03:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1308. [2019-10-13 18:03:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2019-10-13 18:03:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1736 transitions. [2019-10-13 18:03:29,450 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1736 transitions. Word has length 126 [2019-10-13 18:03:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:29,454 INFO L462 AbstractCegarLoop]: Abstraction has 1308 states and 1736 transitions. [2019-10-13 18:03:29,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1736 transitions. [2019-10-13 18:03:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 18:03:29,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:29,465 INFO L380 BasicCegarLoop]: trace histogram [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, 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 18:03:29,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:29,672 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1918057, now seen corresponding path program 1 times [2019-10-13 18:03:29,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:29,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117161578] [2019-10-13 18:03:29,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,674 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:03:29,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117161578] [2019-10-13 18:03:29,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029661458] [2019-10-13 18:03:29,888 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 18:03:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:30,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:30,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 18:03:30,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:30,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:03:30,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811207551] [2019-10-13 18:03:30,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:30,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:30,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:30,078 INFO L87 Difference]: Start difference. First operand 1308 states and 1736 transitions. Second operand 5 states. [2019-10-13 18:03:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:31,226 INFO L93 Difference]: Finished difference Result 3396 states and 4755 transitions. [2019-10-13 18:03:31,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:31,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-10-13 18:03:31,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:31,243 INFO L225 Difference]: With dead ends: 3396 [2019-10-13 18:03:31,244 INFO L226 Difference]: Without dead ends: 2094 [2019-10-13 18:03:31,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:31,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2019-10-13 18:03:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 2062. [2019-10-13 18:03:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2062 states. [2019-10-13 18:03:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2698 transitions. [2019-10-13 18:03:31,335 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2698 transitions. Word has length 182 [2019-10-13 18:03:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:31,336 INFO L462 AbstractCegarLoop]: Abstraction has 2062 states and 2698 transitions. [2019-10-13 18:03:31,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2698 transitions. [2019-10-13 18:03:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 18:03:31,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:31,342 INFO L380 BasicCegarLoop]: trace histogram [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, 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 18:03:31,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:31,569 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:31,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1202443494, now seen corresponding path program 1 times [2019-10-13 18:03:31,570 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:31,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177190926] [2019-10-13 18:03:31,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:31,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:31,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:32,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177190926] [2019-10-13 18:03:32,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999866268] [2019-10-13 18:03:32,326 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 18:03:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:32,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:32,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 18:03:32,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:32,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-13 18:03:32,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397058125] [2019-10-13 18:03:32,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:32,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:32,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:32,559 INFO L87 Difference]: Start difference. First operand 2062 states and 2698 transitions. Second operand 5 states. [2019-10-13 18:03:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:33,772 INFO L93 Difference]: Finished difference Result 4868 states and 6267 transitions. [2019-10-13 18:03:33,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:33,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-13 18:03:33,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:33,789 INFO L225 Difference]: With dead ends: 4868 [2019-10-13 18:03:33,790 INFO L226 Difference]: Without dead ends: 2812 [2019-10-13 18:03:33,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:03:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2019-10-13 18:03:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2434. [2019-10-13 18:03:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2019-10-13 18:03:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2019-10-13 18:03:33,858 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 185 [2019-10-13 18:03:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:33,858 INFO L462 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2019-10-13 18:03:33,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2019-10-13 18:03:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 18:03:33,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:33,861 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:34,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:34,065 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:34,066 INFO L82 PathProgramCache]: Analyzing trace with hash -438667603, now seen corresponding path program 1 times [2019-10-13 18:03:34,066 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:34,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840752472] [2019-10-13 18:03:34,066 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:34,067 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:34,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:34,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840752472] [2019-10-13 18:03:34,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337799278] [2019-10-13 18:03:34,830 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 18:03:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:34,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:34,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:34,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 51 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:35,130 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:35,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-13 18:03:35,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477657111] [2019-10-13 18:03:35,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:35,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:35,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:35,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:35,132 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand 16 states. [2019-10-13 18:03:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:38,055 INFO L93 Difference]: Finished difference Result 5358 states and 6839 transitions. [2019-10-13 18:03:38,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 18:03:38,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 196 [2019-10-13 18:03:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:38,066 INFO L225 Difference]: With dead ends: 5358 [2019-10-13 18:03:38,066 INFO L226 Difference]: Without dead ends: 2883 [2019-10-13 18:03:38,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-10-13 18:03:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2019-10-13 18:03:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2802. [2019-10-13 18:03:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2802 states. [2019-10-13 18:03:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3301 transitions. [2019-10-13 18:03:38,140 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3301 transitions. Word has length 196 [2019-10-13 18:03:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:38,141 INFO L462 AbstractCegarLoop]: Abstraction has 2802 states and 3301 transitions. [2019-10-13 18:03:38,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3301 transitions. [2019-10-13 18:03:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 18:03:38,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:38,144 INFO L380 BasicCegarLoop]: trace histogram [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, 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 18:03:38,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:38,348 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:38,348 INFO L82 PathProgramCache]: Analyzing trace with hash 629311762, now seen corresponding path program 1 times [2019-10-13 18:03:38,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:38,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147546570] [2019-10-13 18:03:38,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:38,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:38,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:38,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147546570] [2019-10-13 18:03:38,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645901698] [2019-10-13 18:03:38,499 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 18:03:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:38,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:38,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:38,673 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:38,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:38,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148285216] [2019-10-13 18:03:38,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:38,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:38,682 INFO L87 Difference]: Start difference. First operand 2802 states and 3301 transitions. Second operand 3 states. [2019-10-13 18:03:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:39,283 INFO L93 Difference]: Finished difference Result 6336 states and 7506 transitions. [2019-10-13 18:03:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:39,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 199 [2019-10-13 18:03:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:39,296 INFO L225 Difference]: With dead ends: 6336 [2019-10-13 18:03:39,297 INFO L226 Difference]: Without dead ends: 3356 [2019-10-13 18:03:39,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2019-10-13 18:03:39,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2618. [2019-10-13 18:03:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2618 states. [2019-10-13 18:03:39,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3077 transitions. [2019-10-13 18:03:39,401 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3077 transitions. Word has length 199 [2019-10-13 18:03:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:39,401 INFO L462 AbstractCegarLoop]: Abstraction has 2618 states and 3077 transitions. [2019-10-13 18:03:39,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3077 transitions. [2019-10-13 18:03:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-13 18:03:39,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:39,404 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:39,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:39,608 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1137862238, now seen corresponding path program 1 times [2019-10-13 18:03:39,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:39,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192617685] [2019-10-13 18:03:39,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:39,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:40,456 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192617685] [2019-10-13 18:03:40,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907516983] [2019-10-13 18:03:40,457 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 18:03:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:40,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:40,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:40,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 18:03:40,669 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:40,669 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-10-13 18:03:40,670 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88888039] [2019-10-13 18:03:40,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:40,670 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:40,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:40,671 INFO L87 Difference]: Start difference. First operand 2618 states and 3077 transitions. Second operand 5 states. [2019-10-13 18:03:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:41,740 INFO L93 Difference]: Finished difference Result 5440 states and 6574 transitions. [2019-10-13 18:03:41,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:41,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-10-13 18:03:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:41,753 INFO L225 Difference]: With dead ends: 5440 [2019-10-13 18:03:41,753 INFO L226 Difference]: Without dead ends: 3194 [2019-10-13 18:03:41,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-13 18:03:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2019-10-13 18:03:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3008. [2019-10-13 18:03:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2019-10-13 18:03:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 3552 transitions. [2019-10-13 18:03:41,821 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 3552 transitions. Word has length 221 [2019-10-13 18:03:41,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:41,822 INFO L462 AbstractCegarLoop]: Abstraction has 3008 states and 3552 transitions. [2019-10-13 18:03:41,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 3552 transitions. [2019-10-13 18:03:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2019-10-13 18:03:41,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:41,827 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:42,030 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:42,032 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1035337430, now seen corresponding path program 1 times [2019-10-13 18:03:42,033 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:42,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278236237] [2019-10-13 18:03:42,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:42,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 134 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-13 18:03:42,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278236237] [2019-10-13 18:03:42,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267624091] [2019-10-13 18:03:42,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 18:03:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:42,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:03:42,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:42,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-13 18:03:42,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117398309] [2019-10-13 18:03:42,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 18:03:42,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 18:03:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:42,871 INFO L87 Difference]: Start difference. First operand 3008 states and 3552 transitions. Second operand 13 states. [2019-10-13 18:03:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:46,555 INFO L93 Difference]: Finished difference Result 5858 states and 7044 transitions. [2019-10-13 18:03:46,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 18:03:46,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 331 [2019-10-13 18:03:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:46,569 INFO L225 Difference]: With dead ends: 5858 [2019-10-13 18:03:46,569 INFO L226 Difference]: Without dead ends: 3038 [2019-10-13 18:03:46,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 18:03:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2019-10-13 18:03:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 3014. [2019-10-13 18:03:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3014 states. [2019-10-13 18:03:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 3465 transitions. [2019-10-13 18:03:46,663 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 3465 transitions. Word has length 331 [2019-10-13 18:03:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:46,664 INFO L462 AbstractCegarLoop]: Abstraction has 3014 states and 3465 transitions. [2019-10-13 18:03:46,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 18:03:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 3465 transitions. [2019-10-13 18:03:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-10-13 18:03:46,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:46,675 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:03:46,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:46,887 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash -854069146, now seen corresponding path program 1 times [2019-10-13 18:03:46,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:46,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297857867] [2019-10-13 18:03:46,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:46,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:03:47,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297857867] [2019-10-13 18:03:47,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947812207] [2019-10-13 18:03:47,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:47,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:47,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:47,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:47,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151698536] [2019-10-13 18:03:47,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:47,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:47,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:47,479 INFO L87 Difference]: Start difference. First operand 3014 states and 3465 transitions. Second operand 3 states. [2019-10-13 18:03:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:48,081 INFO L93 Difference]: Finished difference Result 3744 states and 4308 transitions. [2019-10-13 18:03:48,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:48,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 409 [2019-10-13 18:03:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:48,093 INFO L225 Difference]: With dead ends: 3744 [2019-10-13 18:03:48,093 INFO L226 Difference]: Without dead ends: 3742 [2019-10-13 18:03:48,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2019-10-13 18:03:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3196. [2019-10-13 18:03:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3196 states. [2019-10-13 18:03:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 3673 transitions. [2019-10-13 18:03:48,156 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 3673 transitions. Word has length 409 [2019-10-13 18:03:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:48,157 INFO L462 AbstractCegarLoop]: Abstraction has 3196 states and 3673 transitions. [2019-10-13 18:03:48,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 3673 transitions. [2019-10-13 18:03:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2019-10-13 18:03:48,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:48,161 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:48,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:48,365 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash -62690190, now seen corresponding path program 1 times [2019-10-13 18:03:48,366 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:48,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720074017] [2019-10-13 18:03:48,366 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,366 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:48,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 317 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-13 18:03:49,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720074017] [2019-10-13 18:03:49,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397713553] [2019-10-13 18:03:49,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:49,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:49,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-13 18:03:49,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:49,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:49,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158878904] [2019-10-13 18:03:49,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:49,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:49,750 INFO L87 Difference]: Start difference. First operand 3196 states and 3673 transitions. Second operand 12 states. [2019-10-13 18:03:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:51,757 INFO L93 Difference]: Finished difference Result 6275 states and 7253 transitions. [2019-10-13 18:03:51,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 18:03:51,757 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 415 [2019-10-13 18:03:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:51,769 INFO L225 Difference]: With dead ends: 6275 [2019-10-13 18:03:51,769 INFO L226 Difference]: Without dead ends: 3410 [2019-10-13 18:03:51,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 433 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:03:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2019-10-13 18:03:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3190. [2019-10-13 18:03:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3190 states. [2019-10-13 18:03:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 3520 transitions. [2019-10-13 18:03:51,831 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 3520 transitions. Word has length 415 [2019-10-13 18:03:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:51,831 INFO L462 AbstractCegarLoop]: Abstraction has 3190 states and 3520 transitions. [2019-10-13 18:03:51,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 3520 transitions. [2019-10-13 18:03:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2019-10-13 18:03:51,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:51,837 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:52,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:52,041 INFO L410 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1380853299, now seen corresponding path program 1 times [2019-10-13 18:03:52,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:52,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234252706] [2019-10-13 18:03:52,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:52,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:52,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 414 proven. 8 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-10-13 18:03:53,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234252706] [2019-10-13 18:03:53,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979177972] [2019-10-13 18:03:53,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 18:03:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:53,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:53,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 620 proven. 2 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-13 18:03:53,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:53,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:53,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675925436] [2019-10-13 18:03:53,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:53,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:53,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:53,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:53,453 INFO L87 Difference]: Start difference. First operand 3190 states and 3520 transitions. Second operand 17 states.