/usr/bin/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/Problem15_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:15:39,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:15:39,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:15:39,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:15:39,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:15:39,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:15:39,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:15:39,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:15:39,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:15:39,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:15:39,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:15:39,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:15:39,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:15:39,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:15:39,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:15:39,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:15:39,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:15:39,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:15:39,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:15:39,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:15:39,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:15:39,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:15:39,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:15:39,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:15:39,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:15:39,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:15:39,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:15:39,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:15:39,715 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 [2019-11-06 19:15:39,744 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:15:39,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:15:39,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:15:39,745 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:15:39,746 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:15:39,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:15:39,746 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:15:39,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:15:39,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:15:39,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:15:39,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:15:39,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:15:39,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:15:39,748 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:15:39,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:15:39,748 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:15:39,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:15:39,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:15:39,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:15:39,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:15:39,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:15:39,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:15:39,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:15:39,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:15:39,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:15:39,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:15:39,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:15:39,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:15:39,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:15:40,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:15:40,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:15:40,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:15:40,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:15:40,091 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:15:40,092 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-11-06 19:15:40,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9070a/ac8fa0a3661e46379ec73962cb7f7ffc/FLAGc0ee20c1b [2019-11-06 19:15:40,907 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:15:40,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label33.c [2019-11-06 19:15:40,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9070a/ac8fa0a3661e46379ec73962cb7f7ffc/FLAGc0ee20c1b [2019-11-06 19:15:41,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78ad9070a/ac8fa0a3661e46379ec73962cb7f7ffc [2019-11-06 19:15:41,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:15:41,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:15:41,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:41,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:15:41,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:15:41,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19891321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:41, skipping insertion in model container [2019-11-06 19:15:41,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:15:41" (1/1) ... [2019-11-06 19:15:41,069 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:15:41,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:15:42,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:42,073 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:15:42,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:15:42,344 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:15:42,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42 WrapperNode [2019-11-06 19:15:42,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:15:42,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:15:42,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:15:42,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:15:42,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (1/1) ... [2019-11-06 19:15:42,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:15:42,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:15:42,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:15:42,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:15:42,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (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 [2019-11-06 19:15:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:15:42,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:15:42,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:15:42,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:15:42,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:15:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:15:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:15:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:15:42,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:15:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:15:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:15:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:15:42,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:15:46,454 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:15:46,454 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:15:46,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:46 BoogieIcfgContainer [2019-11-06 19:15:46,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:15:46,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:15:46,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:15:46,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:15:46,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:15:41" (1/3) ... [2019-11-06 19:15:46,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e51ec98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:46, skipping insertion in model container [2019-11-06 19:15:46,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:15:42" (2/3) ... [2019-11-06 19:15:46,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e51ec98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:15:46, skipping insertion in model container [2019-11-06 19:15:46,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:15:46" (3/3) ... [2019-11-06 19:15:46,464 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label33.c [2019-11-06 19:15:46,474 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:15:46,482 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:15:46,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:15:46,524 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:15:46,524 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:15:46,524 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:15:46,524 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:15:46,524 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:15:46,525 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:15:46,525 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:15:46,525 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:15:46,553 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-11-06 19:15:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 19:15:46,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:46,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:46,562 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash 726540760, now seen corresponding path program 1 times [2019-11-06 19:15:46,577 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:46,577 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731920367] [2019-11-06 19:15:46,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:46,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731920367] [2019-11-06 19:15:46,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:46,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:15:46,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409153547] [2019-11-06 19:15:46,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:15:46,857 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:15:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:15:46,875 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-11-06 19:15:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:15:54,897 INFO L93 Difference]: Finished difference Result 1568 states and 2863 transitions. [2019-11-06 19:15:54,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:15:54,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 19:15:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:15:54,943 INFO L225 Difference]: With dead ends: 1568 [2019-11-06 19:15:54,943 INFO L226 Difference]: Without dead ends: 1048 [2019-11-06 19:15:54,953 INFO L630 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 [2019-11-06 19:15:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2019-11-06 19:15:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1025. [2019-11-06 19:15:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2019-11-06 19:15:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1590 transitions. [2019-11-06 19:15:55,085 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1590 transitions. Word has length 28 [2019-11-06 19:15:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:15:55,086 INFO L462 AbstractCegarLoop]: Abstraction has 1025 states and 1590 transitions. [2019-11-06 19:15:55,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:15:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1590 transitions. [2019-11-06 19:15:55,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 19:15:55,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:15:55,094 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:15:55,095 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:15:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:15:55,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1804858835, now seen corresponding path program 1 times [2019-11-06 19:15:55,095 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:15:55,095 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251849964] [2019-11-06 19:15:55,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:15:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:15:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:15:55,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251849964] [2019-11-06 19:15:55,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:15:55,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:15:55,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531953713] [2019-11-06 19:15:55,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:15:55,441 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:15:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:15:55,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:15:55,442 INFO L87 Difference]: Start difference. First operand 1025 states and 1590 transitions. Second operand 8 states. [2019-11-06 19:16:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:01,199 INFO L93 Difference]: Finished difference Result 3048 states and 4814 transitions. [2019-11-06 19:16:01,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:16:01,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2019-11-06 19:16:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:01,216 INFO L225 Difference]: With dead ends: 3048 [2019-11-06 19:16:01,216 INFO L226 Difference]: Without dead ends: 2029 [2019-11-06 19:16:01,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:16:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2019-11-06 19:16:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1671. [2019-11-06 19:16:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1671 states. [2019-11-06 19:16:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2347 transitions. [2019-11-06 19:16:01,304 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2347 transitions. Word has length 100 [2019-11-06 19:16:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:01,305 INFO L462 AbstractCegarLoop]: Abstraction has 1671 states and 2347 transitions. [2019-11-06 19:16:01,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:16:01,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2347 transitions. [2019-11-06 19:16:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-06 19:16:01,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:01,317 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:01,317 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:01,319 INFO L82 PathProgramCache]: Analyzing trace with hash 278762691, now seen corresponding path program 1 times [2019-11-06 19:16:01,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:01,319 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554154234] [2019-11-06 19:16:01,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:01,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554154234] [2019-11-06 19:16:01,598 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344970880] [2019-11-06 19:16:01,598 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 [2019-11-06 19:16:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:01,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 19:16:01,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:01,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:16:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:01,882 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:16:01,882 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-11-06 19:16:01,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150473625] [2019-11-06 19:16:01,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:16:01,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:16:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:16:01,885 INFO L87 Difference]: Start difference. First operand 1671 states and 2347 transitions. Second operand 5 states. [2019-11-06 19:16:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:16:05,976 INFO L93 Difference]: Finished difference Result 3683 states and 5100 transitions. [2019-11-06 19:16:05,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:16:05,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2019-11-06 19:16:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:16:05,988 INFO L225 Difference]: With dead ends: 3683 [2019-11-06 19:16:05,988 INFO L226 Difference]: Without dead ends: 2018 [2019-11-06 19:16:05,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:16:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2019-11-06 19:16:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1985. [2019-11-06 19:16:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1985 states. [2019-11-06 19:16:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2671 transitions. [2019-11-06 19:16:06,095 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2671 transitions. Word has length 108 [2019-11-06 19:16:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:16:06,096 INFO L462 AbstractCegarLoop]: Abstraction has 1985 states and 2671 transitions. [2019-11-06 19:16:06,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:16:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2671 transitions. [2019-11-06 19:16:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 19:16:06,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:16:06,099 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:16:06,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:16:06,304 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:16:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:16:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1676050277, now seen corresponding path program 1 times [2019-11-06 19:16:06,305 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:16:06,305 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517587200] [2019-11-06 19:16:06,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:16:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:16:07,057 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517587200] [2019-11-06 19:16:07,057 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398592788] [2019-11-06 19:16:07,057 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 [2019-11-06 19:16:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:16:07,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 19:16:07,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:16:07,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:16:07,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:16:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 96 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:16:07,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:16:07,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-11-06 19:16:07,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910666731] [2019-11-06 19:16:07,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 19:16:07,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:16:07,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 19:16:07,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-06 19:16:07,441 INFO L87 Difference]: Start difference. First operand 1985 states and 2671 transitions. Second operand 23 states. [2019-11-06 19:16:16,980 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-06 19:16:19,311 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2019-11-06 19:16:20,725 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40