java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:58:50,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:58:51,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:58:51,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:58:51,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:58:51,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:58:51,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:58:51,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:58:51,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:58:51,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:58:51,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:58:51,043 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:58:51,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:58:51,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:58:51,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:58:51,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:58:51,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:58:51,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:58:51,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:58:51,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:58:51,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:58:51,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:58:51,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:58:51,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:58:51,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:58:51,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:58:51,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:58:51,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:58:51,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:58:51,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:58:51,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:58:51,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:58:51,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:58:51,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:58:51,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:58:51,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:58:51,086 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 [2019-10-14 21:58:51,112 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:58:51,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:58:51,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:58:51,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:58:51,114 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:58:51,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:58:51,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:58:51,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:58:51,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:58:51,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:58:51,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:58:51,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:58:51,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:58:51,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:58:51,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:58:51,116 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:58:51,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:58:51,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:58:51,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:58:51,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:58:51,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:58:51,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:51,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:58:51,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:58:51,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:58:51,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:58:51,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:58:51,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:58:51,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:58:51,393 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:58:51,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:58:51,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:58:51,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:58:51,424 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:58:51,425 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2019-10-14 21:58:51,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae73a154/e74761d8ea4e419d8ee394aebb4eb4e1/FLAGd323cac1e [2019-10-14 21:58:52,106 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:58:52,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label18.c [2019-10-14 21:58:52,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae73a154/e74761d8ea4e419d8ee394aebb4eb4e1/FLAGd323cac1e [2019-10-14 21:58:52,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ae73a154/e74761d8ea4e419d8ee394aebb4eb4e1 [2019-10-14 21:58:52,330 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:58:52,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:58:52,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:52,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:58:52,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:58:52,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:52" (1/1) ... [2019-10-14 21:58:52,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558657d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:52, skipping insertion in model container [2019-10-14 21:58:52,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:52" (1/1) ... [2019-10-14 21:58:52,351 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:58:52,415 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:58:53,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:53,153 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:58:53,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:53,416 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:58:53,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53 WrapperNode [2019-10-14 21:58:53,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:53,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:58:53,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:58:53,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:58:53,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (1/1) ... [2019-10-14 21:58:53,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:58:53,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:58:53,613 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:58:53,613 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:58:53,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (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 [2019-10-14 21:58:53,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:58:53,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:58:53,682 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:58:53,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:58:53,683 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:58:53,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:58:53,684 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:58:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:58:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:58:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:58:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:58:55,369 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:58:55,369 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:58:55,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:55 BoogieIcfgContainer [2019-10-14 21:58:55,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:58:55,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:58:55,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:58:55,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:58:55,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:52" (1/3) ... [2019-10-14 21:58:55,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb2a037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:55, skipping insertion in model container [2019-10-14 21:58:55,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:53" (2/3) ... [2019-10-14 21:58:55,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb2a037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:55, skipping insertion in model container [2019-10-14 21:58:55,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:55" (3/3) ... [2019-10-14 21:58:55,380 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label18.c [2019-10-14 21:58:55,391 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:58:55,401 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:58:55,414 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:58:55,445 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:58:55,445 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:58:55,445 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:58:55,445 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:58:55,446 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:58:55,446 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:58:55,446 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:58:55,446 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:58:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:58:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:58:55,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:55,482 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:55,484 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1626993173, now seen corresponding path program 1 times [2019-10-14 21:58:55,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:55,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819217914] [2019-10-14 21:58:55,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:55,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:55,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:55,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819217914] [2019-10-14 21:58:55,917 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:55,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:58:55,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324175003] [2019-10-14 21:58:55,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:55,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:58:55,942 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:58:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:59,136 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2019-10-14 21:58:59,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:59,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-10-14 21:58:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:59,160 INFO L225 Difference]: With dead ends: 998 [2019-10-14 21:58:59,161 INFO L226 Difference]: Without dead ends: 638 [2019-10-14 21:58:59,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:59,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-14 21:58:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2019-10-14 21:58:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-14 21:58:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2019-10-14 21:58:59,276 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 40 [2019-10-14 21:58:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:59,276 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2019-10-14 21:58:59,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2019-10-14 21:58:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:58:59,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:59,283 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:58:59,284 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:59,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1781272370, now seen corresponding path program 1 times [2019-10-14 21:58:59,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:59,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061862496] [2019-10-14 21:58:59,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:59,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:59,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:59,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061862496] [2019-10-14 21:58:59,649 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:59,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:58:59,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612942906] [2019-10-14 21:58:59,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:58:59,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:58:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:58:59,653 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states. [2019-10-14 21:59:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:03,577 INFO L93 Difference]: Finished difference Result 2487 states and 4246 transitions. [2019-10-14 21:59:03,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:59:03,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 110 [2019-10-14 21:59:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:03,615 INFO L225 Difference]: With dead ends: 2487 [2019-10-14 21:59:03,615 INFO L226 Difference]: Without dead ends: 1872 [2019-10-14 21:59:03,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:59:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2019-10-14 21:59:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816. [2019-10-14 21:59:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:59:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2598 transitions. [2019-10-14 21:59:03,780 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2598 transitions. Word has length 110 [2019-10-14 21:59:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:03,783 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2598 transitions. [2019-10-14 21:59:03,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2598 transitions. [2019-10-14 21:59:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:59:03,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:03,797 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:03,798 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash 559014170, now seen corresponding path program 1 times [2019-10-14 21:59:03,799 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:03,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515303365] [2019-10-14 21:59:03,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:03,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:03,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:04,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515303365] [2019-10-14 21:59:04,131 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:04,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:04,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509886829] [2019-10-14 21:59:04,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:04,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:04,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:04,132 INFO L87 Difference]: Start difference. First operand 1816 states and 2598 transitions. Second operand 8 states. [2019-10-14 21:59:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:07,239 INFO L93 Difference]: Finished difference Result 5266 states and 7937 transitions. [2019-10-14 21:59:07,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:07,248 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 120 [2019-10-14 21:59:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:07,272 INFO L225 Difference]: With dead ends: 5266 [2019-10-14 21:59:07,273 INFO L226 Difference]: Without dead ends: 3456 [2019-10-14 21:59:07,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3456 states. [2019-10-14 21:59:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3456 to 3233. [2019-10-14 21:59:07,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2019-10-14 21:59:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions. [2019-10-14 21:59:07,417 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 120 [2019-10-14 21:59:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:07,420 INFO L462 AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions. [2019-10-14 21:59:07,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions. [2019-10-14 21:59:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-14 21:59:07,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:07,431 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:07,431 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:07,432 INFO L82 PathProgramCache]: Analyzing trace with hash 384966816, now seen corresponding path program 1 times [2019-10-14 21:59:07,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:07,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019111937] [2019-10-14 21:59:07,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:07,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:07,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:07,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019111937] [2019-10-14 21:59:07,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935610237] [2019-10-14 21:59:07,792 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 [2019-10-14 21:59:07,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:07,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:59:07,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:07,999 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:07,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:59:07,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811319476] [2019-10-14 21:59:08,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:08,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:08,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:08,002 INFO L87 Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states. [2019-10-14 21:59:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:10,407 INFO L93 Difference]: Finished difference Result 6540 states and 9941 transitions. [2019-10-14 21:59:10,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:59:10,409 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 183 [2019-10-14 21:59:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:10,432 INFO L225 Difference]: With dead ends: 6540 [2019-10-14 21:59:10,432 INFO L226 Difference]: Without dead ends: 3313 [2019-10-14 21:59:10,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-10-14 21:59:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993. [2019-10-14 21:59:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2019-10-14 21:59:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3904 transitions. [2019-10-14 21:59:10,558 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3904 transitions. Word has length 183 [2019-10-14 21:59:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:10,559 INFO L462 AbstractCegarLoop]: Abstraction has 2993 states and 3904 transitions. [2019-10-14 21:59:10,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3904 transitions. [2019-10-14 21:59:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 21:59:10,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:10,563 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:10,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:10,769 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1968960108, now seen corresponding path program 1 times [2019-10-14 21:59:10,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:10,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301334288] [2019-10-14 21:59:10,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:10,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:10,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:11,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301334288] [2019-10-14 21:59:11,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542961812] [2019-10-14 21:59:11,137 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 [2019-10-14 21:59:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:11,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:11,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:11,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:11,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 21:59:11,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903590568] [2019-10-14 21:59:11,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:11,340 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:59:11,341 INFO L87 Difference]: Start difference. First operand 2993 states and 3904 transitions. Second operand 3 states. [2019-10-14 21:59:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:12,414 INFO L93 Difference]: Finished difference Result 7515 states and 10042 transitions. [2019-10-14 21:59:12,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:12,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-10-14 21:59:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:12,437 INFO L225 Difference]: With dead ends: 7515 [2019-10-14 21:59:12,437 INFO L226 Difference]: Without dead ends: 4528 [2019-10-14 21:59:12,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:59:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2019-10-14 21:59:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 4528. [2019-10-14 21:59:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4528 states. [2019-10-14 21:59:12,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5974 transitions. [2019-10-14 21:59:12,619 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5974 transitions. Word has length 193 [2019-10-14 21:59:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:12,620 INFO L462 AbstractCegarLoop]: Abstraction has 4528 states and 5974 transitions. [2019-10-14 21:59:12,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5974 transitions. [2019-10-14 21:59:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-14 21:59:12,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:12,627 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:12,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:12,839 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:12,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1007038762, now seen corresponding path program 1 times [2019-10-14 21:59:12,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:12,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034835146] [2019-10-14 21:59:12,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:12,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:12,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:13,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034835146] [2019-10-14 21:59:13,244 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240949232] [2019-10-14 21:59:13,244 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 [2019-10-14 21:59:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:13,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:13,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:13,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:59:13,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:13,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-14 21:59:13,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134218294] [2019-10-14 21:59:13,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:13,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:13,506 INFO L87 Difference]: Start difference. First operand 4528 states and 5974 transitions. Second operand 5 states. [2019-10-14 21:59:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:15,141 INFO L93 Difference]: Finished difference Result 9113 states and 12144 transitions. [2019-10-14 21:59:15,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:15,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2019-10-14 21:59:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:15,162 INFO L225 Difference]: With dead ends: 9113 [2019-10-14 21:59:15,162 INFO L226 Difference]: Without dead ends: 4591 [2019-10-14 21:59:15,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:59:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2019-10-14 21:59:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4548. [2019-10-14 21:59:15,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4548 states. [2019-10-14 21:59:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 6010 transitions. [2019-10-14 21:59:15,290 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 6010 transitions. Word has length 215 [2019-10-14 21:59:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:15,291 INFO L462 AbstractCegarLoop]: Abstraction has 4548 states and 6010 transitions. [2019-10-14 21:59:15,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 6010 transitions. [2019-10-14 21:59:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-10-14 21:59:15,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:15,298 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:15,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:15,503 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:15,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1219984608, now seen corresponding path program 1 times [2019-10-14 21:59:15,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:15,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976017035] [2019-10-14 21:59:15,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:15,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:15,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 67 proven. 2 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-14 21:59:15,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976017035] [2019-10-14 21:59:15,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7258411] [2019-10-14 21:59:15,864 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 [2019-10-14 21:59:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:15,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:59:15,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:16,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:16,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:18,167 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2019-10-14 21:59:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-14 21:59:20,401 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:20,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:59:20,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019156826] [2019-10-14 21:59:20,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:59:20,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:20,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:59:20,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2019-10-14 21:59:20,403 INFO L87 Difference]: Start difference. First operand 4548 states and 6010 transitions. Second operand 10 states.