/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/Problem11_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:20,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:20,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:20,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:20,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:20,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:20,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:20,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:20,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:20,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:20,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:20,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:20,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:20,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:20,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:20,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:20,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:20,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:20,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:20,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:20,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:20,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:20,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:20,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:20,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:07:20,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:20,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:20,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:20,892 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 19:07:20,919 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:20,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:20,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:20,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:20,922 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:20,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:20,923 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:20,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:20,923 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:20,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:20,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:20,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:20,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:20,925 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:20,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:20,926 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:20,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:20,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:20,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:20,927 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:20,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:20,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:20,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:20,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:20,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:20,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:20,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:20,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:20,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:21,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:21,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:21,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:21,297 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:21,297 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:21,298 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-11-06 19:07:21,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93f2742c/7d93dc73152047449b4c9dc786a6a028/FLAG930b81cb3 [2019-11-06 19:07:22,005 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:22,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-11-06 19:07:22,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93f2742c/7d93dc73152047449b4c9dc786a6a028/FLAG930b81cb3 [2019-11-06 19:07:22,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93f2742c/7d93dc73152047449b4c9dc786a6a028 [2019-11-06 19:07:22,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:22,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:22,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:22,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:22,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:22,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55416243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22, skipping insertion in model container [2019-11-06 19:07:22,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,246 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:22,321 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:23,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:23,060 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:23,253 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:23,279 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:23,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23 WrapperNode [2019-11-06 19:07:23,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:23,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:23,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:23,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:23,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (1/1) ... [2019-11-06 19:07:23,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:23,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:23,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:23,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:23,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (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 19:07:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:23,522 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:23,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:23,523 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:23,524 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:23,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:25,417 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:25,417 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:25,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:25 BoogieIcfgContainer [2019-11-06 19:07:25,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:25,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:25,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:25,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:25,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:22" (1/3) ... [2019-11-06 19:07:25,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc17e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:25, skipping insertion in model container [2019-11-06 19:07:25,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:23" (2/3) ... [2019-11-06 19:07:25,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5edc17e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:25, skipping insertion in model container [2019-11-06 19:07:25,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:25" (3/3) ... [2019-11-06 19:07:25,439 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label01.c [2019-11-06 19:07:25,450 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:25,464 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:25,477 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:25,530 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:25,530 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:25,532 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:25,532 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:25,532 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:25,532 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:25,532 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:25,532 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:07:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 19:07:25,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:25,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:07:25,581 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:25,586 INFO L82 PathProgramCache]: Analyzing trace with hash 155474906, now seen corresponding path program 1 times [2019-11-06 19:07:25,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:25,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670125449] [2019-11-06 19:07:25,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:25,992 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 19:07:25,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670125449] [2019-11-06 19:07:25,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:25,994 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:07:25,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65917249] [2019-11-06 19:07:26,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:26,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:26,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:07:26,018 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:07:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:29,125 INFO L93 Difference]: Finished difference Result 999 states and 1795 transitions. [2019-11-06 19:07:29,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:07:29,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-11-06 19:07:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:29,147 INFO L225 Difference]: With dead ends: 999 [2019-11-06 19:07:29,147 INFO L226 Difference]: Without dead ends: 639 [2019-11-06 19:07:29,156 INFO L630 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 [2019-11-06 19:07:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-11-06 19:07:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 621. [2019-11-06 19:07:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-11-06 19:07:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 956 transitions. [2019-11-06 19:07:29,253 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 956 transitions. Word has length 63 [2019-11-06 19:07:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:29,254 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 956 transitions. [2019-11-06 19:07:29,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 956 transitions. [2019-11-06 19:07:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:07:29,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:29,262 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:29,263 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1591482302, now seen corresponding path program 1 times [2019-11-06 19:07:29,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:29,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904814394] [2019-11-06 19:07:29,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:29,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904814394] [2019-11-06 19:07:29,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711668855] [2019-11-06 19:07:29,596 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 19:07:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:29,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:07:29,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:29,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:29,878 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:29,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:07:29,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340679946] [2019-11-06 19:07:29,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:29,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:07:29,895 INFO L87 Difference]: Start difference. First operand 621 states and 956 transitions. Second operand 5 states. [2019-11-06 19:07:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:31,655 INFO L93 Difference]: Finished difference Result 1833 states and 2866 transitions. [2019-11-06 19:07:31,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:07:31,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-11-06 19:07:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:31,669 INFO L225 Difference]: With dead ends: 1833 [2019-11-06 19:07:31,670 INFO L226 Difference]: Without dead ends: 1218 [2019-11-06 19:07:31,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:07:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-11-06 19:07:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1009. [2019-11-06 19:07:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1009 states. [2019-11-06 19:07:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1374 transitions. [2019-11-06 19:07:31,728 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1374 transitions. Word has length 137 [2019-11-06 19:07:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:31,729 INFO L462 AbstractCegarLoop]: Abstraction has 1009 states and 1374 transitions. [2019-11-06 19:07:31,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1374 transitions. [2019-11-06 19:07:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-11-06 19:07:31,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:31,741 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:31,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:31,942 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:31,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:31,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1188297820, now seen corresponding path program 1 times [2019-11-06 19:07:31,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:31,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420261828] [2019-11-06 19:07:31,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:07:32,442 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420261828] [2019-11-06 19:07:32,443 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738013662] [2019-11-06 19:07:32,443 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 19:07:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:07:32,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:32,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:42,878 WARN L191 SmtUtils]: Spent 8.18 s on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2019-11-06 19:07:45,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:07:47,383 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:47,383 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 19:07:47,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233421789] [2019-11-06 19:07:47,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 19:07:47,387 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 19:07:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=62, Unknown=2, NotChecked=0, Total=90 [2019-11-06 19:07:47,388 INFO L87 Difference]: Start difference. First operand 1009 states and 1374 transitions. Second operand 10 states.